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[PATCH net v5 0/4] net: netpoll: fix memory leak and add comprehensive selftests

by Breno Leitao

Fix a memory leak in netpoll and introduce netconsole selftests that expose the issue when running with kmemleak detection enabled. This patchset includes a selftest for netpoll with multiple concurrent users (netconsole + bonding), which simulates the scenario from test[1] that originally demonstrated the issue allegedly fixed by commit efa95b01da18 ("netpoll: fix use after free") - a commit that is now being reverted. Sending this to "net" branch because this is a fix, and the selftest might help with the backports validation. Link: https://lore.kernel.org/lkml/96b940137a50e5c387687bb4f57de8b0435a653f.14048… [1] Signed-off-by: Breno Leitao <leitao(a)debian.org> --- Changes in v5: - Set CONFIG_BONDING=m in selftests/drivers/net/config. - Link to v4: https://lore.kernel.org/r/20250917-netconsole_torture-v4-0-0a5b3b8f81ce@deb… Changes in v4: - Added an additional selftest to test multiple netpoll users in parallel - Link to v3: https://lore.kernel.org/r/20250905-netconsole_torture-v3-0-875c7febd316@deb… Changes in v3: - This patchset is a merge of the fix and the selftest together as recommended by Jakub. Changes in v2: - Reuse the netconsole creation from lib_netcons.sh. Thus, refactoring the create_dynamic_target() (Jakub) - Move the "wait" to after all the messages has been sent. - Link to v1: https://lore.kernel.org/r/20250902-netconsole_torture-v1-1-03c6066598e9@deb… --- Breno Leitao (4): net: netpoll: fix incorrect refcount handling causing incorrect cleanup selftest: netcons: refactor target creation selftest: netcons: create a torture test selftest: netcons: add test for netconsole over bonded interfaces net/core/netpoll.c | 7 +- tools/testing/selftests/drivers/net/Makefile | 2 + tools/testing/selftests/drivers/net/config | 1 + .../selftests/drivers/net/lib/sh/lib_netcons.sh | 197 ++++++++++++++++++--- .../selftests/drivers/net/netcons_over_bonding.sh | 76 ++++++++ .../selftests/drivers/net/netcons_torture.sh | 127 +++++++++++++ 6 files changed, 385 insertions(+), 25 deletions(-) --- base-commit: 5e87fdc37f8dc619549d49ba5c951b369ce7c136 change-id: 20250902-netconsole_torture-8fc23f0aca99 Best regards, -- Breno Leitao <leitao(a)debian.org>

16 minutes

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[PATCH v2 0/7] vma count: fixes, test and improvements

by Kalesh Singh

Hi all, This is v2 to the VMA count patch I previously posted at: https://lore.kernel.org/r/20250903232437.1454293-1-kaleshsingh@google.com/ I've split it into multiple patches to address the feedback. The main changes in v2 are: - Use a capacity-based check for VMA count limit, per Lorenzo. - Rename map_count to vma_count, per David. - Add assertions for exceeding the limit, per Pedro. - Add tests for max_vma_count, per Liam. - Emit a trace event for failure due to insufficient capacity for observability Tested on x86_64 and arm64: - Build test: - allyesconfig for rename - Selftests: cd tools/testing/selftests/mm && \ make && \ ./run_vmtests.sh -t max_vma_count (With trace_max_vma_count_exceeded enabled) - vma tests: cd tools/testing/vma && \ make && \ ./vma Thanks, Kalesh Kalesh Singh (7): mm: fix off-by-one error in VMA count limit checks mm/selftests: add max_vma_count tests mm: introduce vma_count_remaining() mm: rename mm_struct::map_count to vma_count mm: harden vma_count against direct modification mm: add assertion for VMA count limit mm/tracing: introduce max_vma_count_exceeded trace event fs/binfmt_elf.c | 2 +- fs/coredump.c | 2 +- include/linux/mm.h | 35 +- include/linux/mm_types.h | 5 +- include/trace/events/vma.h | 32 + kernel/fork.c | 2 +- mm/debug.c | 2 +- mm/internal.h | 1 + mm/mmap.c | 28 +- mm/mremap.c | 13 +- mm/nommu.c | 8 +- mm/util.c | 1 - mm/vma.c | 88 ++- tools/testing/selftests/mm/Makefile | 1 + .../selftests/mm/max_vma_count_tests.c | 709 ++++++++++++++++++ tools/testing/selftests/mm/run_vmtests.sh | 5 + tools/testing/vma/vma.c | 32 +- tools/testing/vma/vma_internal.h | 44 +- 18 files changed, 949 insertions(+), 61 deletions(-) create mode 100644 include/trace/events/vma.h create mode 100644 tools/testing/selftests/mm/max_vma_count_tests.c base-commit: f83ec76bf285bea5727f478a68b894f5543ca76e -- 2.51.0.384.g4c02a37b29-goog

29 minutes

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[PATCH v2 00/33] ns: support file handles

by Christian Brauner

For a while now we have supported file handles for pidfds. This has proven to be very useful. Extend the concept to cover namespaces as well. After this patchset it is possible to encode and decode namespace file handles using the commong name_to_handle_at() and open_by_handle_at() apis. Namespaces file descriptors can already be derived from pidfds which means they aren't subject to overmount protection bugs. IOW, it's irrelevant if the caller would not have access to an appropriate /proc/<pid>/ns/ directory as they could always just derive the namespace based on a pidfd already. It has the same advantage as pidfds. It's possible to reliably and for the lifetime of the system refer to a namespace without pinning any resources and to compare them. Permission checking is kept simple. If the caller is located in the namespace the file handle refers to they are able to open it otherwise they must hold privilege over the owning namespace of the relevant namespace. Both the network namespace and the mount namespace already have an associated cookie that isn't recycled and is fully exposed to userspace. Move this into ns_common and use the same id space for all namespaces so they can trivially and reliably be compared. There's more coming based on the iterator infrastructure but the series is large enough and focuses on file handles. Extensive selftests included. Signed-off-by: Christian Brauner <brauner(a)kernel.org> --- Changes in v2: - Address various review comments. - Use a common NS_GET_ID ioctl() instead of individual ioctls. - Link to v1: https://lore.kernel.org/20250910-work-namespace-v1-0-4dd56e7359d8@kernel.org --- Christian Brauner (33): pidfs: validate extensible ioctls nsfs: drop tautological ioctl() check nsfs: validate extensible ioctls block: use extensible_ioctl_valid() ns: move to_ns_common() to ns_common.h nsfs: add nsfs.h header ns: uniformly initialize ns_common cgroup: use ns_common_init() ipc: use ns_common_init() mnt: use ns_common_init() net: use ns_common_init() pid: use ns_common_init() time: use ns_common_init() user: use ns_common_init() uts: use ns_common_init() ns: remove ns_alloc_inum() nstree: make iterator generic mnt: support ns lookup cgroup: support ns lookup ipc: support ns lookup net: support ns lookup pid: support ns lookup time: support ns lookup user: support ns lookup uts: support ns lookup ns: add to_<type>_ns() to respective headers nsfs: add current_in_namespace() nsfs: support file handles nsfs: support exhaustive file handles nsfs: add missing id retrieval support tools: update nsfs.h uapi header selftests/namespaces: add identifier selftests selftests/namespaces: add file handle selftests block/blk-integrity.c | 8 +- fs/fhandle.c | 6 + fs/internal.h | 1 + fs/mount.h | 10 +- fs/namespace.c | 156 +-- fs/nsfs.c | 201 ++- fs/pidfs.c | 2 +- include/linux/cgroup.h | 5 + include/linux/exportfs.h | 6 + include/linux/fs.h | 14 + include/linux/ipc_namespace.h | 5 + include/linux/ns_common.h | 29 + include/linux/nsfs.h | 40 + include/linux/nsproxy.h | 11 - include/linux/nstree.h | 89 ++ include/linux/pid_namespace.h | 5 + include/linux/proc_ns.h | 32 +- include/linux/time_namespace.h | 9 + include/linux/user_namespace.h | 5 + include/linux/utsname.h | 5 + include/net/net_namespace.h | 6 + include/uapi/linux/fcntl.h | 1 + include/uapi/linux/nsfs.h | 15 +- init/main.c | 2 + ipc/msgutil.c | 1 + ipc/namespace.c | 12 +- ipc/shm.c | 2 + kernel/Makefile | 2 +- kernel/cgroup/cgroup.c | 2 + kernel/cgroup/namespace.c | 24 +- kernel/nstree.c | 233 ++++ kernel/pid_namespace.c | 13 +- kernel/time/namespace.c | 23 +- kernel/user_namespace.c | 17 +- kernel/utsname.c | 28 +- net/core/net_namespace.c | 59 +- tools/include/uapi/linux/nsfs.h | 17 +- tools/testing/selftests/namespaces/.gitignore | 2 + tools/testing/selftests/namespaces/Makefile | 7 + tools/testing/selftests/namespaces/config | 7 + .../selftests/namespaces/file_handle_test.c | 1429 ++++++++++++++++++++ tools/testing/selftests/namespaces/nsid_test.c | 986 ++++++++++++++ 42 files changed, 3257 insertions(+), 270 deletions(-) --- base-commit: 8f5ae30d69d7543eee0d70083daf4de8fe15d585 change-id: 20250905-work-namespace-c68826dda0d4

37 minutes

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[PATCH] selftests: always install UAPI headers to the correct directory

by Thomas Weißschuh

Currently the UAPI headers are always installed into the source directory. When building out-of-tree this doesn't work, as the include path will be wrong and it dirties the source tree, leading to complains by kbuild. Make sure the 'headers' target installs the UAPI headers in the correctly. The real target directory can come from multiple places. To handle them all extract the target directory from KHDR_INCLUDES. Reported-by: Jason Gunthorpe <jgg(a)nvidia.com> Closes: https://lore.kernel.org/lkml/20250917153209.GA2023406@nvidia.com/ Fixes: 1a59f5d31569 ("selftests: Add headers target") Signed-off-by: Thomas Weißschuh <thomas.weissschuh(a)linutronix.de> Reviewed-by: Jason Gunthorpe <jgg(a)nvidia.com> --- tools/testing/selftests/lib.mk | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/lib.mk b/tools/testing/selftests/lib.mk index 5303900339292e618dee4fd7ff8a7c2fa3209a68..a448fae57831d86098806adaff53f6f1a747febb 100644 --- a/tools/testing/selftests/lib.mk +++ b/tools/testing/selftests/lib.mk @@ -228,7 +228,10 @@ $(OUTPUT)/%:%.S $(LINK.S) $^ $(LDLIBS) -o $@ endif +# Extract the expected header directory +khdr_output := $(patsubst %/usr/include,%,$(filter %/usr/include,$(KHDR_INCLUDES))) + headers: - $(Q)$(MAKE) -C $(top_srcdir) headers + $(Q)$(MAKE) -f $(top_srcdir)/Makefile -C $(khdr_output) headers .PHONY: run_tests all clean install emit_tests gen_mods_dir clean_mods_dir headers --- base-commit: 8f5ae30d69d7543eee0d70083daf4de8fe15d585 change-id: 20250918-kselftest-uapi-out-of-tree-98d50f59040c Best regards, -- Thomas Weißschuh <thomas.weissschuh(a)linutronix.de>

1 hour, 2 minutes

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[PATCH v4 0/7] Add support for FEAT_{LS64, LS64_V} and related tests

by Yicong Yang

From: Yicong Yang <yangyicong(a)hisilicon.com> Armv8.7 introduces single-copy atomic 64-byte loads and stores instructions and its variants named under FEAT_{LS64, LS64_V}. Add support for Armv8.7 FEAT_{LS64, LS64_V}: - Add identifying and enabling in the cpufeature list - Expose the support of these features to userspace through HWCAP3 and cpuinfo - Add related hwcap test - Handle the trap of unsupported memory (normal/uncacheable) access in a VM A real scenario for this feature is that the userspace driver can make use of this to implement direct WQE (workqueue entry) - a mechanism to fill WQE directly into the hardware. Picked Marc's 2 patches form [1] for handling the LS64 trap in a VM on emulated MMIO and the introduce of KVM_EXIT_ARM_LDST64B. [1] https://lore.kernel.org/linux-arm-kernel/20240815125959.2097734-1-maz@kerne… Tested with updated hwcap test: [root@localhost tmp]# dmesg | grep "All CPU(s) started" [ 14.789859] CPU: All CPU(s) started at EL2 [root@localhost tmp]# ./hwcap # LS64 present ok 217 cpuinfo_match_LS64 ok 218 sigill_LS64 ok 219 # SKIP sigbus_LS64_V # LS64_V present ok 220 cpuinfo_match_LS64_V ok 221 sigill_LS64_V ok 222 # SKIP sigbus_LS64_V # 115 skipped test(s) detected. Consider enabling relevant config options to improve coverage. # Totals: pass:107 fail:0 xfail:0 xpass:0 skip:115 error:0 root@localhost:/mnt# dmesg | grep "All CPU(s) started" [ 0.281152] CPU: All CPU(s) started at EL1 root@localhost:/mnt# ./hwcap # LS64 present ok 217 cpuinfo_match_LS64 ok 218 sigill_LS64 ok 219 # SKIP sigbus_LS64 # LS64_V present ok 220 cpuinfo_match_LS64_V ok 221 sigill_LS64_V ok 222 # SKIP sigbus_LS64_V # 115 skipped test(s) detected. Consider enabling relevant config options to improve coverage. # Totals: pass:107 fail:0 xfail:0 xpass:0 skip:115 error:0 Change since v3: - Inject DABT fault for LS64 fault on unsupported memory but with valid memslot Link: https://lore.kernel.org/linux-arm-kernel/20250626080906.64230-1-yangyicong@… Change since v2: - Handle the LS64 fault to userspace and allow userspace to inject LS64 fault - Reorder the patches to make KVM handling prior to feature support Link: https://lore.kernel.org/linux-arm-kernel/20250331094320.35226-1-yangyicong@… Change since v1: - Drop the support for LS64_ACCDATA - handle the DABT of unsupported memory type after checking the memory attributes Link: https://lore.kernel.org/linux-arm-kernel/20241202135504.14252-1-yangyicong@… Marc Zyngier (2): KVM: arm64: Add exit to userspace on {LD,ST}64B* outside of memslots KVM: arm64: Add documentation for KVM_EXIT_ARM_LDST64B Yicong Yang (5): KVM: arm64: Handle DABT caused by LS64* instructions on unsupported memory arm64: Provide basic EL2 setup for FEAT_{LS64, LS64_V} usage at EL0/1 arm64: Add support for FEAT_{LS64, LS64_V} KVM: arm64: Enable FEAT_{LS64, LS64_V} in the supported guest kselftest/arm64: Add HWCAP test for FEAT_{LS64, LS64_V} Documentation/arch/arm64/booting.rst | 12 +++ Documentation/arch/arm64/elf_hwcaps.rst | 6 ++ Documentation/virt/kvm/api.rst | 43 +++++++++-- arch/arm64/include/asm/el2_setup.h | 12 ++- arch/arm64/include/asm/esr.h | 8 ++ arch/arm64/include/asm/hwcap.h | 2 + arch/arm64/include/asm/kvm_emulate.h | 7 ++ arch/arm64/include/uapi/asm/hwcap.h | 2 + arch/arm64/kernel/cpufeature.c | 51 +++++++++++++ arch/arm64/kernel/cpuinfo.c | 2 + arch/arm64/kvm/inject_fault.c | 29 ++++++++ arch/arm64/kvm/mmio.c | 27 ++++++- arch/arm64/kvm/mmu.c | 14 +++- arch/arm64/tools/cpucaps | 2 + include/uapi/linux/kvm.h | 3 +- tools/testing/selftests/arm64/abi/hwcap.c | 90 +++++++++++++++++++++++ 16 files changed, 299 insertions(+), 11 deletions(-) -- 2.24.0

1 hour, 49 minutes

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[RFC PATCH bpf-next v1 0/3] bpf: Add BPF program type for overriding tracepoint probes

by Fuyu Zhao

Hi everyone, This patchset introduces a new BPF program type that allows overriding a tracepoint probe function registered via register_trace_*. Motivation ---------- Tracepoint probe functions registered via register_trace_* in the kernel cannot be dynamically modified, changing a probe function requires recompiling the kernel and rebooting. Nor can BPF programs change an existing probe function. Overiding tracepoint supports a way to apply patches into kernel quickly (such as applying security ones), through predefined static tracepoints, without waiting for upstream integration. This patchset demonstrates the way to override probe functions by BPF program. Overview -------- This patchset adds BPF_PROG_TYPE_RAW_TRACEPOINT_OVERRIDE program type. When this type of BPF program attaches, it overrides the target tracepoint probe function. And it also extends a new struct type "tracepoint_func_snapshot", which extends the tracepoint structure. It is used to record the original probe function registered by kernel after BPF program being attached and restore from it after detachment. Critical steps -------------- 1. Attach: Attach programs via the raw_tracepoint_open syscall. 2. Override: (a) Locate the target probe by `probe_name`. (b) Override target probe with the BPF program. (c) Save the BPF program and target probe function into "tracepoint_func_snapshot". 3. Restore: When the BPF program is detached, automatically restore the original probe function from earlier saved snapshot. Future work ----------- This patchset is intended as a first step toward supporting BPF programs that can override tracepoint probes. The current implementation may not yet cover all use cases or handle every corner case. I welcome feedback and suggestions from the community, and will continue to refine and improve the design based on comments and real-world requirements. Thanks! Fuyu Fuyu Zhao (3): bpf: Introduce BPF_PROG_TYPE_RAW_TRACEPOINT_OVERRIDE libbpf: Add support for BPF_PROG_TYPE_RAW_TRACEPOINT_OVERRIDE selftests/bpf: Add selftest for "raw_tp.o" include/linux/bpf_types.h | 2 + include/linux/trace_events.h | 9 + include/linux/tracepoint-defs.h | 6 + include/linux/tracepoint.h | 3 + include/uapi/linux/bpf.h | 2 + kernel/bpf/syscall.c | 35 +++- kernel/trace/bpf_trace.c | 31 +++ kernel/tracepoint.c | 190 +++++++++++++++++- tools/include/uapi/linux/bpf.h | 2 + tools/lib/bpf/bpf.c | 1 + tools/lib/bpf/bpf.h | 3 +- tools/lib/bpf/libbpf.c | 27 ++- tools/lib/bpf/libbpf.h | 3 +- .../bpf/prog_tests/raw_tp_override_test_run.c | 23 +++ .../bpf/progs/test_raw_tp_override_test_run.c | 20 ++ .../selftests/bpf/test_kmods/bpf_testmod.c | 7 + 16 files changed, 352 insertions(+), 12 deletions(-) create mode 100644 tools/testing/selftests/bpf/prog_tests/raw_tp_override_test_run.c create mode 100644 tools/testing/selftests/bpf/progs/test_raw_tp_override_test_run.c -- 2.43.0

2 hours, 11 minutes

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[PATCH v2] mm/memory-failure: Support disabling soft offline for HugeTLB pages

by Kyle Meyer

Soft offlining a HugeTLB page reduces the HugeTLB page pool. Commit 56374430c5dfc ("mm/memory-failure: userspace controls soft-offlining pages") introduced the following sysctl interface to control soft offline: /proc/sys/vm/enable_soft_offline The interface does not distinguish between page types: 0 - Soft offline is disabled 1 - Soft offline is enabled Convert enable_soft_offline to a bitmask and support disabling soft offline for HugeTLB pages: Bits: 0 - Enable soft offline 1 - Disable soft offline for HugeTLB pages Supported values: 0 - Soft offline is disabled 1 - Soft offline is enabled 3 - Soft offline is enabled (disabled for HugeTLB pages) Existing behavior is preserved. Update documentation and HugeTLB soft offline self tests. Reported-by: Shawn Fan <shawn.fan(a)intel.com> Suggested-by: Tony Luck <tony.luck(a)intel.com> Signed-off-by: Kyle Meyer <kyle.meyer(a)hpe.com> --- Tony's patch: * https://lore.kernel.org/all/20250904155720.22149-1-tony.luck@intel.com v1: * https://lore.kernel.org/all/aMGkAI3zKlVsO0S2@hpe.com v1 -> v2: * Make the interface extensible, as suggested by David. * Preserve existing behavior, as suggested by Jiaqi and David. Why clear errno in self tests? madvise() does not set errno when it's successful and errno is set by madvise() during test_soft_offline_common(3) causing test_soft_offline_common(1) to fail: # Test soft-offline when enabled_soft_offline=1 # Hugepagesize is 1048576kB # enable_soft_offline => 1 # Before MADV_SOFT_OFFLINE nr_hugepages=7 # Allocated 0x80000000 bytes of hugetlb pages # MADV_SOFT_OFFLINE 0x7fd600000000 ret=0, errno=95 # MADV_SOFT_OFFLINE should ret 0 # After MADV_SOFT_OFFLINE nr_hugepages=6 not ok 2 Test soft-offline when enabled_soft_offline=1 --- .../ABI/testing/sysfs-memory-page-offline | 3 ++ Documentation/admin-guide/sysctl/vm.rst | 28 ++++++++++++++++--- mm/memory-failure.c | 17 +++++++++-- .../selftests/mm/hugetlb-soft-offline.c | 19 ++++++++++--- 4 files changed, 56 insertions(+), 11 deletions(-) diff --git a/Documentation/ABI/testing/sysfs-memory-page-offline b/Documentation/ABI/testing/sysfs-memory-page-offline index 00f4e35f916f..d3f05ed6605e 100644 --- a/Documentation/ABI/testing/sysfs-memory-page-offline +++ b/Documentation/ABI/testing/sysfs-memory-page-offline @@ -20,6 +20,9 @@ Description: number, or a error when the offlining failed. Reading the file is not allowed. + Soft-offline can be controlled via sysctl, see: + Documentation/admin-guide/sysctl/vm.rst + What: /sys/devices/system/memory/hard_offline_page Date: Sep 2009 KernelVersion: 2.6.33 diff --git a/Documentation/admin-guide/sysctl/vm.rst b/Documentation/admin-guide/sysctl/vm.rst index 4d71211fdad8..ace73480eb9d 100644 --- a/Documentation/admin-guide/sysctl/vm.rst +++ b/Documentation/admin-guide/sysctl/vm.rst @@ -309,19 +309,39 @@ physical memory) vs performance / capacity implications in transparent and HugeTLB cases. For all architectures, enable_soft_offline controls whether to soft offline -memory pages. When set to 1, kernel attempts to soft offline the pages -whenever it thinks needed. When set to 0, kernel returns EOPNOTSUPP to -the request to soft offline the pages. Its default value is 1. +memory pages. + +enable_soft_offline is a bitmask: + +Bits:: + + 0 - Enable soft offline + 1 - Disable soft offline for HugeTLB pages + +Supported values:: + + 0 - Soft offline is disabled + 1 - Soft offline is enabled + 3 - Soft offline is enabled (disabled for HugeTLB pages) + +The default value is 1. + +If soft offline is disabled for the requested page type, EOPNOTSUPP is returned. It is worth mentioning that after setting enable_soft_offline to 0, the following requests to soft offline pages will not be performed: +- Request to soft offline from sysfs (soft_offline_page). + - Request to soft offline pages from RAS Correctable Errors Collector. -- On ARM, the request to soft offline pages from GHES driver. +- On ARM and X86, the request to soft offline pages from GHES driver. - On PARISC, the request to soft offline pages from Page Deallocation Table. +Note: + Soft offlining a HugeTLB page reduces the HugeTLB page pool. + extfrag_threshold ================= diff --git a/mm/memory-failure.c b/mm/memory-failure.c index fc30ca4804bf..0ad9ae11d9e8 100644 --- a/mm/memory-failure.c +++ b/mm/memory-failure.c @@ -64,11 +64,14 @@ #include "internal.h" #include "ras/ras_event.h" +#define SOFT_OFFLINE_ENABLED BIT(0) +#define SOFT_OFFLINE_SKIP_HUGETLB BIT(1) + static int sysctl_memory_failure_early_kill __read_mostly; static int sysctl_memory_failure_recovery __read_mostly = 1; -static int sysctl_enable_soft_offline __read_mostly = 1; +static int sysctl_enable_soft_offline __read_mostly = SOFT_OFFLINE_ENABLED; atomic_long_t num_poisoned_pages __read_mostly = ATOMIC_LONG_INIT(0); @@ -150,7 +153,7 @@ static const struct ctl_table memory_failure_table[] = { .mode = 0644, .proc_handler = proc_dointvec_minmax, .extra1 = SYSCTL_ZERO, - .extra2 = SYSCTL_ONE, + .extra2 = SYSCTL_THREE, } }; @@ -2799,12 +2802,20 @@ int soft_offline_page(unsigned long pfn, int flags) return -EIO; } - if (!sysctl_enable_soft_offline) { + if (!(sysctl_enable_soft_offline & SOFT_OFFLINE_ENABLED)) { pr_info_once("disabled by /proc/sys/vm/enable_soft_offline\n"); put_ref_page(pfn, flags); return -EOPNOTSUPP; } + if (sysctl_enable_soft_offline & SOFT_OFFLINE_SKIP_HUGETLB) { + if (folio_test_hugetlb(pfn_folio(pfn))) { + pr_info_once("disabled for HugeTLB pages by /proc/sys/vm/enable_soft_offline\n"); + put_ref_page(pfn, flags); + return -EOPNOTSUPP; + } + } + mutex_lock(&mf_mutex); if (PageHWPoison(page)) { diff --git a/tools/testing/selftests/mm/hugetlb-soft-offline.c b/tools/testing/selftests/mm/hugetlb-soft-offline.c index f086f0e04756..b87c8778cadf 100644 --- a/tools/testing/selftests/mm/hugetlb-soft-offline.c +++ b/tools/testing/selftests/mm/hugetlb-soft-offline.c @@ -5,6 +5,8 @@ * offlining failed with EOPNOTSUPP. * - if enable_soft_offline = 1, a hugepage should be dissolved and * nr_hugepages/free_hugepages should be reduced by 1. + * - if enable_soft_offline = 3, hugepages should stay intact and soft + * offlining failed with EOPNOTSUPP. * * Before running, make sure more than 2 hugepages of default_hugepagesz * are allocated. For example, if /proc/meminfo/Hugepagesize is 2048kB: @@ -32,6 +34,9 @@ #define EPREFIX " !!! " +#define SOFT_OFFLINE_ENABLED (1 << 0) +#define SOFT_OFFLINE_SKIP_HUGETLB (1 << 1) + static int do_soft_offline(int fd, size_t len, int expect_errno) { char *filemap = NULL; @@ -56,6 +61,7 @@ static int do_soft_offline(int fd, size_t len, int expect_errno) ksft_print_msg("Allocated %#lx bytes of hugetlb pages\n", len); hwp_addr = filemap + len / 2; + errno = 0; ret = madvise(hwp_addr, pagesize, MADV_SOFT_OFFLINE); ksft_print_msg("MADV_SOFT_OFFLINE %p ret=%d, errno=%d\n", hwp_addr, ret, errno); @@ -83,7 +89,7 @@ static int set_enable_soft_offline(int value) char cmd[256] = {0}; FILE *cmdfile = NULL; - if (value != 0 && value != 1) + if (value < 0 || value > 3) return -EINVAL; sprintf(cmd, "echo %d > /proc/sys/vm/enable_soft_offline", value); @@ -155,13 +161,17 @@ static int create_hugetlbfs_file(struct statfs *file_stat) static void test_soft_offline_common(int enable_soft_offline) { int fd; - int expect_errno = enable_soft_offline ? 0 : EOPNOTSUPP; + int expect_errno = 0; struct statfs file_stat; unsigned long hugepagesize_kb = 0; unsigned long nr_hugepages_before = 0; unsigned long nr_hugepages_after = 0; int ret; + if (!(enable_soft_offline & SOFT_OFFLINE_ENABLED) || + (enable_soft_offline & SOFT_OFFLINE_SKIP_HUGETLB)) + expect_errno = EOPNOTSUPP; + ksft_print_msg("Test soft-offline when enabled_soft_offline=%d\n", enable_soft_offline); @@ -198,7 +208,7 @@ static void test_soft_offline_common(int enable_soft_offline) // No need for the hugetlbfs file from now on. close(fd); - if (enable_soft_offline) { + if (expect_errno == 0) { if (nr_hugepages_before != nr_hugepages_after + 1) { ksft_test_result_fail("MADV_SOFT_OFFLINE should reduced 1 hugepage\n"); return; @@ -219,8 +229,9 @@ static void test_soft_offline_common(int enable_soft_offline) int main(int argc, char **argv) { ksft_print_header(); - ksft_set_plan(2); + ksft_set_plan(3); + test_soft_offline_common(3); test_soft_offline_common(1); test_soft_offline_common(0); -- 2.51.0

2 hours, 25 minutes

8
16
0 0

[PATCH bpf-next v3 00/14] selftests/bpf: Integrate test_xsk.c to test_progs framework

by Bastien Curutchet (eBPF Foundation)

Hi all, This is a second version of a series I sent some time ago, it continues the work of migrating the script tests into prog_tests. The test_xsk.sh script covers many AF_XDP use cases. The tests it runs are defined in xksxceiver.c. Since this script is used to test real hardware, the goal here is to leave it as it is, and only integrate the tests that run on veth peers into the test_progs framework. Some tests are flaky so they can't be integrated in the CI as they are. I think that fixing their flakyness would require a significant amount of work. So, as first step, I've excluded them from the list of tests migrated to the CI (see PATCH 13). If these tests get fixed at some point, integrating them into the CI will be straightforward. PATCH 1 extracts test_xsk[.c/.h] from xskxceiver[.c/.h] to make the tests available to test_progs. PATCH 2 to 5 fix small issues in the current test PATCH 7 to 12 handle all errors to release resources instead of calling exit() when any error occurs. PATCH 13 isolates some flaky tests PATCH 14 integrate the non-flaky tests to the test_progs framework Maciej, I've fixed the bug you found in the initial series. I've looked for any hardware able to run test_xsk.sh in my office, but I couldn't find one ... So here again, only the veth part has been tested, sorry about that. Signed-off-by: Bastien Curutchet (eBPF Foundation) <bastien.curutchet(a)bootlin.com> --- Changes in v3: - Rebase on latest bpf-next_base to integrate commit c9110e6f7237 ("selftests/bpf: Fix count write in testapp_xdp_metadata_copy()"). - Move XDP_METADATA_COPY_* tests from flaky-tests to nominal tests - Link to v2: https://lore.kernel.org/r/20250902-xsk-v2-0-17c6345d5215@bootlin.com Changes in v2: - Rebase on the latest bpf-next_base and integrate the newly added tests to the work (adjust_tail* and tx_queue_consumer tests) - Re-order patches to split xkxceiver sooner. - Fix the bug reported by Maciej. - Fix verbose mode in test_xsk.sh by keeping kselftest (remove PATCH 1, 7 and 8) - Link to v1: https://lore.kernel.org/r/20250313-xsk-v1-0-7374729a93b9@bootlin.com --- Bastien Curutchet (eBPF Foundation) (14): selftests/bpf: test_xsk: Split xskxceiver selftests/bpf: test_xsk: Initialize bitmap before use selftests/bpf: test_xsk: Fix memory leaks selftests/bpf: test_xsk: Wrap test clean-up in functions selftests/bpf: test_xsk: Release resources when swap fails selftests/bpf: test_xsk: Add return value to init_iface() selftests/bpf: test_xsk: Don't exit immediately when xsk_attach fails selftests/bpf: test_xsk: Don't exit immediately when gettimeofday fails selftests/bpf: test_xsk: Don't exit immediately when workers fail selftests/bpf: test_xsk: Don't exit immediately if validate_traffic fails selftests/bpf: test_xsk: Don't exit immediately on allocation failures selftests/bpf: test_xsk: Move exit_with_error to xskxceiver.c selftests/bpf: test_xsk: Isolate flaky tests selftests/bpf: test_xsk: Integrate test_xsk.c to test_progs framework tools/testing/selftests/bpf/Makefile | 11 +- tools/testing/selftests/bpf/prog_tests/test_xsk.c | 2604 ++++++++++++++++++++ tools/testing/selftests/bpf/prog_tests/test_xsk.h | 294 +++ tools/testing/selftests/bpf/prog_tests/xsk.c | 146 ++ tools/testing/selftests/bpf/xskxceiver.c | 2685 +-------------------- tools/testing/selftests/bpf/xskxceiver.h | 156 -- 6 files changed, 3170 insertions(+), 2726 deletions(-) --- base-commit: e4e08c130231eb8071153ab5f056874d8f70430b change-id: 20250218-xsk-0cf90e975d14 Best regards, -- Bastien Curutchet (eBPF Foundation) <bastien.curutchet(a)bootlin.com>

2 hours, 51 minutes

4
25
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[PATCH v5 00/15] Consolidate iommu page table implementations (AMD)

by Jason Gunthorpe

[Lots of changes in comments thanks to Randy] Currently each of the iommu page table formats duplicates all of the logic to maintain the page table and perform map/unmap/etc operations. There are several different versions of the algorithms between all the different formats. The io-pgtable system provides an interface to help isolate the page table code from the iommu driver, but doesn't provide tools to implement the common algorithms. This makes it very hard to improve the state of the pagetable code under the iommu domains as any proposed improvement needs to alter a large number of different driver code paths. Combined with a lack of software based testing this makes improvement in this area very hard. iommufd wants several new page table operations: - More efficient map/unmap operations, using iommufd's batching logic - unmap that returns the physical addresses into a batch as it progresses - cut that allows splitting areas so large pages can have holes poked in them dynamically (ie guestmemfd hitless shared/private transitions) - More agressive freeing of table memory to avoid waste - Fragmenting large pages so that dirty tracking can be more granular - Reassembling large pages so that VMs can run at full IO performance in migration/dirty tracking error flows - KHO integration for kernel live upgrade Together these are algorithmically complex enough to be a very significant task to go and implement in all the page table formats we support. Just the "server" focused drivers use almost all the formats (ARMv8 S1&S2 / x86 PAE / AMDv1 / VT-D SS / RISCV) Instead of doing the duplicated work, this series takes the first step to consolidate the algorithms into one places. In spirit it is similar to the work Christoph did a few years back to pull the redundant get_user_pages() implementations out of the arch code into core MM. This unlocked a great deal of improvement in that space in the following years. I would like to see the same benefit in iommu as well. My first RFC showed a bigger picture with all most all formats and more algorithms. This series reorganizes that to be narrowly focused on just enough to convert the AMD driver to use the new mechanism. kunit tests are provided that allow good testing of the algorithms and all formats on x86, nothing is arch specific. AMD is one of the simpler options as the HW is quite uniform with few different options/bugs while still requiring the complicated contiguous pages support. The HW also has a very simple range based invalidation approach that is easy to implement. The AMD v1 and AMD v2 page table formats are implemented bit for bit identical to the current code, tested using a compare kunit test that checks against the io-pgtable version (on github, see below). Updating the AMD driver to replace the io-pgtable layer with the new stuff is fairly straightforward now. The layering is fixed up in the new version so that all the invalidation goes through function pointers. Several small fixing patches have come out of this as I've been fixing the problems that the test suite uncovers in the current code, and implementing the fixed version in iommupt. On performance, there is a quite wide variety of implementation designs across all the drivers. Looking at some key performance across the main formats: iommu_map(): pgsz ,avg new,old ns, min new,old ns , min % (+ve is better) 2^12, 53,66 , 51,63 , 19.19 (AMDV1) 256*2^12, 386,1909 , 367,1795 , 79.79 256*2^21, 362,1633 , 355,1556 , 77.77 2^12, 56,62 , 52,59 , 11.11 (AMDv2) 256*2^12, 405,1355 , 357,1292 , 72.72 256*2^21, 393,1160 , 358,1114 , 67.67 2^12, 55,65 , 53,62 , 14.14 (VTD second stage) 256*2^12, 391,518 , 332,512 , 35.35 256*2^21, 383,635 , 336,624 , 46.46 2^12, 57,65 , 55,63 , 12.12 (ARM 64 bit) 256*2^12, 380,389 , 361,369 , 2.02 256*2^21, 358,419 , 345,400 , 13.13 iommu_unmap(): pgsz ,avg new,old ns, min new,old ns , min % (+ve is better) 2^12, 69,88 , 65,85 , 23.23 (AMDv1) 256*2^12, 353,6498 , 331,6029 , 94.94 256*2^21, 373,6014 , 360,5706 , 93.93 2^12, 71,72 , 66,69 , 4.04 (AMDv2) 256*2^12, 228,891 , 206,871 , 76.76 256*2^21, 254,721 , 245,711 , 65.65 2^12, 69,87 , 65,82 , 20.20 (VTD second stage) 256*2^12, 210,321 , 200,315 , 36.36 256*2^21, 255,349 , 238,342 , 30.30 2^12, 72,77 , 68,74 , 8.08 (ARM 64 bit) 256*2^12, 521,357 , 447,346 , -29.29 256*2^21, 489,358 , 433,345 , -25.25 * Above numbers include additional patches to remove the iommu_pgsize() overheads. gcc 13.3.0, i7-12700 This version provides fairly consistent performance across formats. ARM unmap performance is quite different because this version supports contiguous pages and uses a very different algorithm for unmapping. Though why it is so worse compared to AMDv1 I haven't figured out yet. The per-format commits include a more detailed chart. There is a second branch: https://github.com/jgunthorpe/linux/commits/iommu_pt_all Containing supporting work and future steps: - ARM short descriptor (32 bit), ARM long descriptor (64 bit) formats - RISCV format and RISCV conversion https://github.com/jgunthorpe/linux/commits/iommu_pt_riscv - Support for a DMA incoherent HW page table walker - VT-D second stage format and VT-D conversion https://github.com/jgunthorpe/linux/commits/iommu_pt_vtd - DART v1 & v2 format - Draft of a iommufd 'cut' operation to break down huge pages - A compare test that checks the iommupt formats against the iopgtable interface, including updating AMD to have a working iopgtable and patches to make VT-D have an iopgtable for testing. - A performance test to micro-benchmark map and unmap against iogptable My strategy is to go one by one for the drivers: - AMD driver conversion - RISCV page table and driver - Intel VT-D driver and VTDSS page table - Flushing improvements for RISCV - ARM SMMUv3 And concurrently work on the algorithm side: - debugfs content dump, like VT-D has - Cut support - Increase/Decrease page size support - map/unmap batching - KHO As we make more algorithm improvements the value to convert the drivers increases. This is on github: https://github.com/jgunthorpe/linux/commits/iommu_pt v4: - Text grammar updates and kdoc fixes v3: https://patch.msgid.link/r/0-v4-0d6a6726a372+18959-iommu_pt_jgg@nvidia.com - Rebase on v6.16-rc3 - Integrate the HATS/HATDis changes - Remove 'default n' from kconfig - Remove unused 'PT_FIXED_TOP_LEVEL' - Improve comments and coumentation - Fix some compile warnings from kbuild robots v2: https://patch.msgid.link/r/0-v3-a93aab628dbc+521-iommu_pt_jgg@nvidia.com - Rebase on v6.16-rc2 - s/PT_ENTRY_WORD_SIZE/PT_ITEM_WORD_SIZE/s to follow the language better - Comment and documentation updates - Add PT_TOP_PHYS_MASK to help manage alignment restrictions on the top pointer - Add missed force_aperture = true - Make pt_iommu_deinit() take care of the not-yet-inited error case internally as AMD/RISCV/VTD all shared this logic - Change gather_range() into gather_range_pages() so it also deals with the page list. This makes the following cache flushing series simpler - Fix missed update of unmap->unmapped in some error cases - Change clear_contig() to order the gather more logically - Remove goto from the error handling in __map_range_leaf() - s/log2_/oalog2_/ in places where the argument is an oaddr_t - Pass the pts to pt_table_install64/32() - Do not use SIGN_EXTEND for the AMDv2 page table because of Vasant's information on how PASID 0 works. v1: https://patch.msgid.link/r/0-v2-5c26bde5c22d+58b-iommu_pt_jgg@nvidia.com - AMD driver only, many code changes RFC: https://lore.kernel.org/all/0-v1-01fa10580981+1d-iommu_pt_jgg@nvidia.com/ Alejandro Jimenez (1): iommu/amd: Use the generic iommu page table Jason Gunthorpe (14): genpt: Generic Page Table base API genpt: Add Documentation/ files iommupt: Add the basic structure of the iommu implementation iommupt: Add the AMD IOMMU v1 page table format iommupt: Add iova_to_phys op iommupt: Add unmap_pages op iommupt: Add map_pages op iommupt: Add read_and_clear_dirty op iommupt: Add a kunit test for Generic Page Table iommupt: Add a mock pagetable format for iommufd selftest to use iommufd: Change the selftest to use iommupt instead of xarray iommupt: Add the x86 64 bit page table format iommu/amd: Remove AMD io_pgtable support iommupt: Add a kunit test for the IOMMU implementation .clang-format | 1 + Documentation/driver-api/generic_pt.rst | 140 ++ Documentation/driver-api/index.rst | 1 + drivers/iommu/Kconfig | 2 + drivers/iommu/Makefile | 1 + drivers/iommu/amd/Kconfig | 5 +- drivers/iommu/amd/Makefile | 2 +- drivers/iommu/amd/amd_iommu.h | 1 - drivers/iommu/amd/amd_iommu_types.h | 109 +- drivers/iommu/amd/io_pgtable.c | 560 -------- drivers/iommu/amd/io_pgtable_v2.c | 370 ------ drivers/iommu/amd/iommu.c | 538 ++++---- drivers/iommu/generic_pt/.kunitconfig | 13 + drivers/iommu/generic_pt/Kconfig | 67 + drivers/iommu/generic_pt/fmt/Makefile | 26 + drivers/iommu/generic_pt/fmt/amdv1.h | 409 ++++++ drivers/iommu/generic_pt/fmt/defs_amdv1.h | 21 + drivers/iommu/generic_pt/fmt/defs_x86_64.h | 21 + drivers/iommu/generic_pt/fmt/iommu_amdv1.c | 15 + drivers/iommu/generic_pt/fmt/iommu_mock.c | 10 + drivers/iommu/generic_pt/fmt/iommu_template.h | 48 + drivers/iommu/generic_pt/fmt/iommu_x86_64.c | 11 + drivers/iommu/generic_pt/fmt/x86_64.h | 248 ++++ drivers/iommu/generic_pt/iommu_pt.h | 1149 +++++++++++++++++ drivers/iommu/generic_pt/kunit_generic_pt.h | 717 ++++++++++ drivers/iommu/generic_pt/kunit_iommu.h | 183 +++ drivers/iommu/generic_pt/kunit_iommu_pt.h | 451 +++++++ drivers/iommu/generic_pt/pt_common.h | 355 +++++ drivers/iommu/generic_pt/pt_defs.h | 323 +++++ drivers/iommu/generic_pt/pt_fmt_defaults.h | 193 +++ drivers/iommu/generic_pt/pt_iter.h | 636 +++++++++ drivers/iommu/generic_pt/pt_log2.h | 130 ++ drivers/iommu/io-pgtable.c | 4 - drivers/iommu/iommufd/Kconfig | 1 + drivers/iommu/iommufd/iommufd_test.h | 11 +- drivers/iommu/iommufd/selftest.c | 438 +++---- include/linux/generic_pt/common.h | 166 +++ include/linux/generic_pt/iommu.h | 270 ++++ include/linux/io-pgtable.h | 2 - tools/testing/selftests/iommu/iommufd.c | 60 +- tools/testing/selftests/iommu/iommufd_utils.h | 12 + 41 files changed, 6128 insertions(+), 1592 deletions(-) create mode 100644 Documentation/driver-api/generic_pt.rst delete mode 100644 drivers/iommu/amd/io_pgtable.c delete mode 100644 drivers/iommu/amd/io_pgtable_v2.c create mode 100644 drivers/iommu/generic_pt/.kunitconfig create mode 100644 drivers/iommu/generic_pt/Kconfig create mode 100644 drivers/iommu/generic_pt/fmt/Makefile create mode 100644 drivers/iommu/generic_pt/fmt/amdv1.h create mode 100644 drivers/iommu/generic_pt/fmt/defs_amdv1.h create mode 100644 drivers/iommu/generic_pt/fmt/defs_x86_64.h create mode 100644 drivers/iommu/generic_pt/fmt/iommu_amdv1.c create mode 100644 drivers/iommu/generic_pt/fmt/iommu_mock.c create mode 100644 drivers/iommu/generic_pt/fmt/iommu_template.h create mode 100644 drivers/iommu/generic_pt/fmt/iommu_x86_64.c create mode 100644 drivers/iommu/generic_pt/fmt/x86_64.h create mode 100644 drivers/iommu/generic_pt/iommu_pt.h create mode 100644 drivers/iommu/generic_pt/kunit_generic_pt.h create mode 100644 drivers/iommu/generic_pt/kunit_iommu.h create mode 100644 drivers/iommu/generic_pt/kunit_iommu_pt.h create mode 100644 drivers/iommu/generic_pt/pt_common.h create mode 100644 drivers/iommu/generic_pt/pt_defs.h create mode 100644 drivers/iommu/generic_pt/pt_fmt_defaults.h create mode 100644 drivers/iommu/generic_pt/pt_iter.h create mode 100644 drivers/iommu/generic_pt/pt_log2.h create mode 100644 include/linux/generic_pt/common.h create mode 100644 include/linux/generic_pt/iommu.h base-commit: 8da0d63bd5726ff656bfa1eacb45d6f5cce65616 -- 2.43.0

3 hours, 44 minutes

3
27
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[PATCH v19 net-next 00/10] AccECN protocol patch series

by chia-yu.chang＠nokia-bell-labs.com

From: Chia-Yu Chang <chia-yu.chang(a)nokia-bell-labs.com> Hello, Please find the v19 AccECN protocol patch series, which covers the core functionality of Accurate ECN, AccECN negotiation, AccECN TCP options, and AccECN failure handling. The Accurate ECN draft can be found in https://datatracker.ietf.org/doc/html/draft-ietf-tcpm-accurate-ecn-28, and it will be RFC9768. This patch series is part of the full AccECN patch series, which is available at https://github.com/L4STeam/linux-net-next/commits/upstream_l4steam/ Best Regards, Chia-Yu --- v19 (16-Sep-2025) - Repost remaining 10 patches in this series, as the first 4 patches are applied (Jakub Kicinski <kuba(a)kernel.org>) v18 (11-Sep-2025) - Reorder tcpi_accecn_fail_mode and tcpi_accecn_opt_seen to avoid adding fields in the middle of tcp_info (Eric Dumazet <edumazet(a)google.com>) v17 (8-Sep-2025) - Change tcp_ecn_mode_max from 5 to 2 to disable AccECN enablement before the whole AccECN feature been accpeted v16 (6-Sep-2025) - Use TCP_ECN_IN_ACCECN_OUT_ACCECN, TCP_ECN_IN_ECN_OUT_ECN, and TCP_ECN_IN_ACCECN_OUT_ECN in comments of tcp_ecn_send_syn() (Eric Dumazet <edumazet(a)google.com>) - Add tcpi_accecn_fail_mode and tcpi_accecn_opt_seen to make tcp_info be multiple of 64 bits in patch #12 v15 (14-Aug-205) - Update pahole results in commit messages - Accurate ECN will become RFC9768 v14 (22-Jul-2025) - Add missing const for struct tcp_sock of tcp_accecn_option_beacon_check() of #11 (Simon Horman <horms(a)kernel.org>) v13 (18-Jul-2025) - Implement tcp_accecn_extract_syn_ect() and tcp_accecn_reflector_flags() with static array lookup of patch #6 (Paolo Abeni <pabeni(a)redhat.com>) - Fix typos in comments of #6 and remove patch #7 of v12 about simulatenous connect (Paolo Abeni <pabeni(a)redhat.com>) - Move TCP_ACCECN_E1B_INIT_OFFSET, TCP_ACCECN_E0B_INIT_OFFSET, and TCP_ACCECN_CEB_INIT_OFFSET from patch #7 to #11 (Paolo Abeni <pabeni(a)redhat.com>) - Use static array lookup in tcp_accecn_optfield_to_ecnfield() of patch #11 (Paolo Abeni <pabeni(a)redhat.com>) - Return false when WARN_ON_ONCE() is true in tcp_accecn_process_option() of patch #11 (Paolo Abeni <pabeni(a)redhat.com>) - Make synack_ecn_bytes as static const array and use const u32 pointer in tcp_options_write() of #11 (Paolo Abeni <pabeni(a)redhat.com>) - Use ALIGN() and ALIGN_DOWN() in tcp_options_fit_accecn() to pad TCP AccECN option to dword of #11 (Paolo Abeni <pabeni(a)redhat.com>) - Return TCP_ACCECN_OPT_FAIL_SEEN if WARN_ON_ONCE() is true in tcp_accecn_option_init() of #12 (Paolo Abeni <pabeni(a)redhat.com>) v12 (04-Jul-2025) - Fix compilation issues with some intermediate patches in v11 - Add more comments for AccECN helpers of tcp_ecn.h v11 (03-Jul-2025) - Fix compilation issues with some intermediate patches in v10 v10 (02-Jul-2025) - Add new patch of separated header file include/net/tcp_ecn.h to include ECN and AccECN functions (Eric Dumazet <edumazet(a)google.com>) - Add comments on the AccECN helper functions in tcp_ecn.h (Eric Dumazet <edumazet(a)google.com>) - Add documentation of tcp_ecn, tcp_ecn_option, tcp_ecn_beacon in ip-sysctl.rst to the corresponding patch (Eric Dumazet <edumazet(a)google.com>) - Split wait third ACK functionality into a separated patch from AccECN negotiation patch (Eric Dumazet <edumazet(a)google.com>) - Add READ_ONCE() over every reads of sysctl for all patches in the series (Eric Dumazet <edumazet(a)google.com>) - Merge heuristics of AccECN option ceb/cep and ACE field multi-wrap into a single patch - Add a table of SACK block reduction and required AccECN field in patch #15 commit message (Eric Dumazet <edumazet(a)google.com>) v9 (21-Jun-2025) - Use tcp_data_ecn_check() to set TCP_ECN_SEE flag only for RFC3168 ECN (Paolo Abeni <pabeni(a)redhat.com>) - Add comments about setting TCP_ECN_SEEN flag for RFC3168 and Accruate ECN (Paolo Abeni <pabeni(a)redhat.com>) - Restruct the code in the for loop of tcp_accecn_process_option() (Paolo Abeni <pabeni(a)redhat.com>) - Remove ecn_bytes and add use_synack_ecn_bytes flag to identify whether syn_ack_bytes or received_ecn_bytes is used (Paolo Abeni <pabeni(a)redhat.com>) - Replace leftover_bytes and leftover_size with leftover_highbyte and leftover_lowbyte and add comments in tcp_options_write() (Paolo Abeni <pabeni(a)redhat.com>) - Add comments and commit message about the 1st retx SYN still attempt AccECN negotiation (Paolo Abeni <pabeni(a)redhat.com>) v8 (10-Jun-2025) - Add new helper function tcp_ecn_received_counters_payload() in #6 (Paolo Abeni <pabeni(a)redhat.com>) - Set opts->num_sack_blocks=0 to avoid potential undefined value in #8 (Paolo Abeni <pabeni(a)redhat.com>) - Reset leftover_size to 2 once leftover_bytes is used in #9 (Paolo Abeni <pabeni(a)redhat.com>) - Add new helper function tcp_accecn_opt_demand_min() in #10 (Paolo Abeni <pabeni(a)redhat.com>) - Add new helper function tcp_accecn_saw_opt_fail_recv() in #11 (Paolo Abeni <pabeni(a)redhat.com>) - Update tcp_options_fit_accecn() to avoid using recursion in #14 (Paolo Abeni <pabeni(a)redhat.com>) v7 (14-May-2025) - Modify group sizes of tcp_sock_write_txrx and tcp_sock_write_rx in #3 based on pahole results (Paolo Abeni <pabeni(a)redhat.com>) - Fix the issue in #4 and #5 where the RFC3168 ECN behavior in tcp_ecn_send() is changed (Paolo Abeni <pabeni(a)redhat.com>) - Modify group size of tcp_sock_write_txrx in #4 and #6 based on pahole results (Paolo Abeni <pabeni(a)redhat.com>) - Update commit message for #9 to explain the increase in tcp_sock_write_rx group size - Modify group size of tcp_sock_write_tx in #10 based on pahole results v6 (09-May-2025) - Add #3 to utilize exisintg holes of tcp_sock_write_txrx group for later patches (#4, #9, #10) with new u8 members (Paolo Abeni <pabeni(a)redhat.com>) - Add pahole outcomes before and after commit in #4, #5, #6, #9, #10, #15 (Paolo Abeni <pabeni(a)redhat.com>) - Define new helper function tcp_send_ack_reflect_ect() for sending ACK with reflected ECT in #5 (Paolo Abeni <pabeni(a)redhat.com>) - Add comments for function tcp_ecn_rcv_synack() in #5 (Paolo Abeni <pabeni(a)redhat.com>) - Add enum/define to be used by sysctl_tcp_ecn in #5, sysctl_tcp_ecn_option in #9, and sysctl_tcp_ecn_option_beacon in #10 (Paolo Abeni <pabeni(a)redhat.com>) - Move accecn_fail_mode and saw_accecn_opt in #5 and #11 to use exisintg holes of tcp_sock (Paolo Abeni <pabeni(a)redhat.com>) - Change data type of new members of tcp_request_sock and move them to the end of struct in #5 and #11 (Paolo Abeni <pabeni(a)redhat.com>) - Move new members of tcp_info to the end of struct in #6 (Paolo Abeni <pabeni(a)redhat.com>) - Merge previous #7 into #9 (Paolo Abeni <pabeni(a)redhat.com>) - Mask ecnfield with INET_ECN_MASK to remove WARN_ONCE in #9 (Paolo Abeni <pabeni(a)redhat.com>) - Reduce the indentation levels for reabability in #9 and #10 (Paolo Abeni <pabeni(a)redhat.com>) - Move delivered_ecn_bytes to the RX group in #9, accecn_opt_tstamp to the TX group in #10, pkts_acked_ewma to the RX group in #15 (Paolo Abeni <pabeni(a)redhat.com>) - Add changes in Documentation/networking/net_cachelines/tcp_sock.rst for new tcp_sock members in #3, #5, #6, #9, #10, #15 v5 (22-Apr-2025) - Further fix for 32-bit ARM alignment in tcp.c (Simon Horman <horms(a)kernel.org>) v4 (18-Apr-2025) - Fix 32-bit ARM assertion for alignment requirement (Simon Horman <horms(a)kernel.org>) v3 (14-Apr-2025) - Fix patch apply issue in v2 (Jakub Kicinski <kuba(a)kernel.org>) v2 (18-Mar-2025) - Add one missing patch from the previous AccECN protocol preparation patch series to this patch series. --- Chia-Yu Chang (3): tcp: accecn: AccECN option send control tcp: accecn: AccECN option failure handling tcp: accecn: try to fit AccECN option with SACK Ilpo Järvinen (7): tcp: AccECN core tcp: accecn: AccECN negotiation tcp: accecn: add AccECN rx byte counters tcp: accecn: AccECN needs to know delivered bytes tcp: sack option handling improvements tcp: accecn: AccECN option tcp: accecn: AccECN option ceb/cep and ACE field multi-wrap heuristics Documentation/networking/ip-sysctl.rst | 55 +- .../networking/net_cachelines/tcp_sock.rst | 12 + include/linux/tcp.h | 28 +- include/net/netns/ipv4.h | 2 + include/net/tcp.h | 33 ++ include/net/tcp_ecn.h | 554 +++++++++++++++++- include/uapi/linux/tcp.h | 9 + net/ipv4/syncookies.c | 4 + net/ipv4/sysctl_net_ipv4.c | 19 + net/ipv4/tcp.c | 30 +- net/ipv4/tcp_input.c | 318 +++++++++- net/ipv4/tcp_ipv4.c | 8 +- net/ipv4/tcp_minisocks.c | 40 +- net/ipv4/tcp_output.c | 239 +++++++- net/ipv6/syncookies.c | 2 + net/ipv6/tcp_ipv6.c | 1 + 16 files changed, 1278 insertions(+), 76 deletions(-) -- 2.34.1

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