September 2024 - Linux-stable-mirror

[PATCH 6.6 3/4] riscv: mm: Only compile pgtable.c if MMU

by WangYuli

From: Alexandre Ghiti <alexghiti(a)rivosinc.com> [ Upstream commit d6508999d1882ddd0db8b3b4bd7967d83e9909fa ] All functions defined in there depend on MMU, so no need to compile it for !MMU configs. Signed-off-by: Alexandre Ghiti <alexghiti(a)rivosinc.com> Link: https://lore.kernel.org/r/20231213203001.179237-4-alexghiti@rivosinc.com Signed-off-by: Palmer Dabbelt <palmer(a)rivosinc.com> Signed-off-by: WangYuli <wangyuli(a)uniontech.com> --- arch/riscv/mm/Makefile | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/arch/riscv/mm/Makefile b/arch/riscv/mm/Makefile index 3a4dfc8babcf..2c869f8026a8 100644 --- a/arch/riscv/mm/Makefile +++ b/arch/riscv/mm/Makefile @@ -13,10 +13,9 @@ endif KCOV_INSTRUMENT_init.o := n obj-y += init.o -obj-$(CONFIG_MMU) += extable.o fault.o pageattr.o +obj-$(CONFIG_MMU) += extable.o fault.o pageattr.o pgtable.o obj-y += cacheflush.o obj-y += context.o -obj-y += pgtable.o obj-y += pmem.o ifeq ($(CONFIG_MMU),y) -- 2.43.4

1 year

1
0
0 0

[PATCH 6.6 2/4] mm: Introduce pudp/p4dp/pgdp_get() functions

by WangYuli

From: Alexandre Ghiti <alexghiti(a)rivosinc.com> [ Upstream commit eba2591d99d1f14a04c8a8a845ab0795b93f5646 ] Instead of directly dereferencing page tables entries, which can cause issues (see commit 20a004e7b017 ("arm64: mm: Use READ_ONCE/WRITE_ONCE when accessing page tables"), let's introduce new functions to get the pud/p4d/pgd entries (the pte and pmd versions already exist). Note that arm pgd_t is actually an array so pgdp_get() is defined as a macro to avoid a build error. Those new functions will be used in subsequent commits by the riscv architecture. Signed-off-by: Alexandre Ghiti <alexghiti(a)rivosinc.com> Link: https://lore.kernel.org/r/20231213203001.179237-3-alexghiti@rivosinc.com Signed-off-by: Palmer Dabbelt <palmer(a)rivosinc.com> Signed-off-by: WangYuli <wangyuli(a)uniontech.com> --- arch/arm/include/asm/pgtable.h | 2 ++ include/linux/pgtable.h | 21 +++++++++++++++++++++ 2 files changed, 23 insertions(+) diff --git a/arch/arm/include/asm/pgtable.h b/arch/arm/include/asm/pgtable.h index 16b02f44c7d3..d657b84b6bf7 100644 --- a/arch/arm/include/asm/pgtable.h +++ b/arch/arm/include/asm/pgtable.h @@ -151,6 +151,8 @@ extern pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn, extern pgd_t swapper_pg_dir[PTRS_PER_PGD]; +#define pgdp_get(pgpd) READ_ONCE(*pgdp) + #define pud_page(pud) pmd_page(__pmd(pud_val(pud))) #define pud_write(pud) pmd_write(__pmd(pud_val(pud))) diff --git a/include/linux/pgtable.h b/include/linux/pgtable.h index af7639c3b0a3..8b7daccd11be 100644 --- a/include/linux/pgtable.h +++ b/include/linux/pgtable.h @@ -292,6 +292,27 @@ static inline pmd_t pmdp_get(pmd_t *pmdp) } #endif +#ifndef pudp_get +static inline pud_t pudp_get(pud_t *pudp) +{ + return READ_ONCE(*pudp); +} +#endif + +#ifndef p4dp_get +static inline p4d_t p4dp_get(p4d_t *p4dp) +{ + return READ_ONCE(*p4dp); +} +#endif + +#ifndef pgdp_get +static inline pgd_t pgdp_get(pgd_t *pgdp) +{ + return READ_ONCE(*pgdp); +} +#endif + #ifndef __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG static inline int ptep_test_and_clear_young(struct vm_area_struct *vma, unsigned long address, -- 2.43.4

1 year

1
0
0 0

[PATCH 6.6 1/4] riscv: Use WRITE_ONCE() when setting page table entries

by WangYuli

From: Alexandre Ghiti <alexghiti(a)rivosinc.com> [ Upstream commit c30fa83b49897e708a52e122dd10616a52a4c82b ] To avoid any compiler "weirdness" when accessing page table entries which are concurrently modified by the HW, let's use WRITE_ONCE() macro (commit 20a004e7b017 ("arm64: mm: Use READ_ONCE/WRITE_ONCE when accessing page tables") gives a great explanation with more details). Signed-off-by: Alexandre Ghiti <alexghiti(a)rivosinc.com> Link: https://lore.kernel.org/r/20231213203001.179237-2-alexghiti@rivosinc.com Signed-off-by: Palmer Dabbelt <palmer(a)rivosinc.com> Signed-off-by: WangYuli <wangyuli(a)uniontech.com> --- arch/riscv/include/asm/pgtable-64.h | 6 +++--- arch/riscv/include/asm/pgtable.h | 4 ++-- 2 files changed, 5 insertions(+), 5 deletions(-) diff --git a/arch/riscv/include/asm/pgtable-64.h b/arch/riscv/include/asm/pgtable-64.h index 7a5097202e15..a65a352dcfbf 100644 --- a/arch/riscv/include/asm/pgtable-64.h +++ b/arch/riscv/include/asm/pgtable-64.h @@ -198,7 +198,7 @@ static inline int pud_user(pud_t pud) static inline void set_pud(pud_t *pudp, pud_t pud) { - *pudp = pud; + WRITE_ONCE(*pudp, pud); } static inline void pud_clear(pud_t *pudp) @@ -274,7 +274,7 @@ static inline unsigned long _pmd_pfn(pmd_t pmd) static inline void set_p4d(p4d_t *p4dp, p4d_t p4d) { if (pgtable_l4_enabled) - *p4dp = p4d; + WRITE_ONCE(*p4dp, p4d); else set_pud((pud_t *)p4dp, (pud_t){ p4d_val(p4d) }); } @@ -347,7 +347,7 @@ static inline pud_t *pud_offset(p4d_t *p4d, unsigned long address) static inline void set_pgd(pgd_t *pgdp, pgd_t pgd) { if (pgtable_l5_enabled) - *pgdp = pgd; + WRITE_ONCE(*pgdp, pgd); else set_p4d((p4d_t *)pgdp, (p4d_t){ pgd_val(pgd) }); } diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h index 719c3041ae1c..f8e72df4113a 100644 --- a/arch/riscv/include/asm/pgtable.h +++ b/arch/riscv/include/asm/pgtable.h @@ -248,7 +248,7 @@ static inline int pmd_leaf(pmd_t pmd) static inline void set_pmd(pmd_t *pmdp, pmd_t pmd) { - *pmdp = pmd; + WRITE_ONCE(*pmdp, pmd); } static inline void pmd_clear(pmd_t *pmdp) @@ -515,7 +515,7 @@ static inline int pte_same(pte_t pte_a, pte_t pte_b) */ static inline void set_pte(pte_t *ptep, pte_t pteval) { - *ptep = pteval; + WRITE_ONCE(*ptep, pteval); } void flush_icache_pte(pte_t pte); -- 2.43.4

1 year

1
0
0 0

[PATCH v2] usb: cdnsp: Fix incorrect usb_request status

by Pawel Laszczak

Fix changes incorrect usb_request->status returned during disabling endpoints. Before fix the status returned during dequeuing requests while disabling endpoint was ECONNRESET. Patch change it to ESHUTDOWN. Patch fixes issue detected during testing UVC gadget. During stopping streaming the class starts dequeuing usb requests and controller driver returns the -ECONNRESET status. After completion requests the class or application "uvc-gadget" try to queue this request again. Changing this status to ESHUTDOWN cause that UVC assumes that endpoint is disabled, or device is disconnected and stops re-queuing usb requests. Fixes: 3d82904559f4 ("usb: cdnsp: cdns3 Add main part of Cadence USBSSP DRD Driver") cc: stable(a)vger.kernel.org Signed-off-by: Pawel Laszczak <pawell(a)cadence.com> --- Changelog: v2: - added explanation of issue drivers/usb/cdns3/cdnsp-ring.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/usb/cdns3/cdnsp-ring.c b/drivers/usb/cdns3/cdnsp-ring.c index 1e011560e3ae..bccc8fc143d0 100644 --- a/drivers/usb/cdns3/cdnsp-ring.c +++ b/drivers/usb/cdns3/cdnsp-ring.c @@ -718,7 +718,8 @@ int cdnsp_remove_request(struct cdnsp_device *pdev, seg = cdnsp_trb_in_td(pdev, cur_td->start_seg, cur_td->first_trb, cur_td->last_trb, hw_deq); - if (seg && (pep->ep_state & EP_ENABLED)) + if (seg && (pep->ep_state & EP_ENABLED) && + !(pep->ep_state & EP_DIS_IN_RROGRESS)) cdnsp_find_new_dequeue_state(pdev, pep, preq->request.stream_id, cur_td, &deq_state); else @@ -736,7 +737,8 @@ int cdnsp_remove_request(struct cdnsp_device *pdev, * During disconnecting all endpoint will be disabled so we don't * have to worry about updating dequeue pointer. */ - if (pdev->cdnsp_state & CDNSP_STATE_DISCONNECT_PENDING) { + if (pdev->cdnsp_state & CDNSP_STATE_DISCONNECT_PENDING || + pep->ep_state & EP_DIS_IN_RROGRESS) { status = -ESHUTDOWN; ret = cdnsp_cmd_set_deq(pdev, pep, &deq_state); } -- 2.43.0

1 year

2
1
0 0

Business Proposal

by dandsmiller＠frontier.com

Good day. I am seeking a reliable and experienced partner to manage our real estate investments in your country. The ideal partner will possess: - In-depth knowledge of the local real estate market - Proven track record in property management and development - Strong network and connections in the industry - Ability to navigate regulatory requirements - Transparency, integrity, and a commitment to delivering results Responsibilities: The partner will be responsible for: - Sourcing and evaluating investment opportunities - Conducting due diligence and risk assessments - Managing property acquisition, development, and sales - Ensuring compliance with local laws and regulations - Providing regular updates and performance reports Benefits: By partnering with us, you will benefit from: - Access to substantial investment capital - Opportunity to collaborate with a reputable UK-based company - Shared success and returns on investment. I look forward to the possibility of working together and achieving mutual success in the real estate market. If you are interested in exploring this partnership opportunity, I would be delighted to schedule a call or meeting to discuss further. Best regards Croitoru Vasile.

1 year

1
0
0 0

[PATCH v2] usb: dwc2: drd: fix clock gating on USB role switch

by Tomas Marek

The dwc2_handle_usb_suspend_intr() function disables gadget clocks in USB peripheral mode when no other power-down mode is available (introduced by commit 0112b7ce68ea ("usb: dwc2: Update dwc2_handle_usb_suspend_intr function.")). However, the dwc2_drd_role_sw_set() USB role update handler attempts to read DWC2 registers if the USB role has changed while the USB is in suspend mode (when the clocks are gated). This causes the system to hang. Release the gadget clocks before handling the USB role update. Fixes: 0112b7ce68ea ("usb: dwc2: Update dwc2_handle_usb_suspend_intr function.") Cc: stable(a)vger.kernel.org Signed-off-by: Tomas Marek <tomas.marek(a)elrest.cz> --- Changes in v2: - CC stable(a)vger.kernel.org - merge ifdef and nested if statements into one if statement --- drivers/usb/dwc2/drd.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/usb/dwc2/drd.c b/drivers/usb/dwc2/drd.c index a8605b02115b..1ad8fa3f862a 100644 --- a/drivers/usb/dwc2/drd.c +++ b/drivers/usb/dwc2/drd.c @@ -127,6 +127,15 @@ static int dwc2_drd_role_sw_set(struct usb_role_switch *sw, enum usb_role role) role = USB_ROLE_DEVICE; } + if ((IS_ENABLED(CONFIG_USB_DWC2_PERIPHERAL) || + IS_ENABLED(CONFIG_USB_DWC2_DUAL_ROLE)) && + dwc2_is_device_mode(hsotg) && + hsotg->lx_state == DWC2_L2 && + hsotg->params.power_down == DWC2_POWER_DOWN_PARAM_NONE && + hsotg->bus_suspended && + !hsotg->params.no_clock_gating) + dwc2_gadget_exit_clock_gating(hsotg, 0); + if (role == USB_ROLE_HOST) { already = dwc2_ovr_avalid(hsotg, true); } else if (role == USB_ROLE_DEVICE) { -- 2.25.1

1 year

1
0
0 0

[PATCH mm-unstable v2 3/3] mm/codetag: add pgalloc_tag_copy()

by Yu Zhao

Add pgalloc_tag_copy() to transfer the codetag from the old folio to the new one during migration. This makes original allocation sites persist cross migration rather than lump into the get_new_folio callbacks passed into migrate_pages(), e.g., compaction_alloc(): # echo 1 >/proc/sys/vm/compact_memory # grep compaction_alloc /proc/allocinfo Before this patch: 132968448 32463 mm/compaction.c:1880 func:compaction_alloc After this patch: 0 0 mm/compaction.c:1880 func:compaction_alloc Fixes: dcfe378c81f7 ("lib: introduce support for page allocation tagging") Signed-off-by: Yu Zhao <yuzhao(a)google.com> Acked-by: Suren Baghdasaryan <surenb(a)google.com> Cc: <stable(a)vger.kernel.org> --- include/linux/alloc_tag.h | 24 ++++++++++-------------- include/linux/mm.h | 27 +++++++++++++++++++++++++++ mm/migrate.c | 1 + 3 files changed, 38 insertions(+), 14 deletions(-) diff --git a/include/linux/alloc_tag.h b/include/linux/alloc_tag.h index 896491d9ebe8..1f0a9ff23a2c 100644 --- a/include/linux/alloc_tag.h +++ b/include/linux/alloc_tag.h @@ -137,7 +137,16 @@ static inline void alloc_tag_sub_check(union codetag_ref *ref) {} /* Caller should verify both ref and tag to be valid */ static inline void __alloc_tag_ref_set(union codetag_ref *ref, struct alloc_tag *tag) { + alloc_tag_add_check(ref, tag); + if (!ref || !tag) + return; + ref->ct = &tag->ct; +} + +static inline void alloc_tag_ref_set(union codetag_ref *ref, struct alloc_tag *tag) +{ + __alloc_tag_ref_set(ref, tag); /* * We need in increment the call counter every time we have a new * allocation or when we split a large allocation into smaller ones. @@ -147,22 +156,9 @@ static inline void __alloc_tag_ref_set(union codetag_ref *ref, struct alloc_tag this_cpu_inc(tag->counters->calls); } -static inline void alloc_tag_ref_set(union codetag_ref *ref, struct alloc_tag *tag) -{ - alloc_tag_add_check(ref, tag); - if (!ref || !tag) - return; - - __alloc_tag_ref_set(ref, tag); -} - static inline void alloc_tag_add(union codetag_ref *ref, struct alloc_tag *tag, size_t bytes) { - alloc_tag_add_check(ref, tag); - if (!ref || !tag) - return; - - __alloc_tag_ref_set(ref, tag); + alloc_tag_ref_set(ref, tag); this_cpu_add(tag->counters->bytes, bytes); } diff --git a/include/linux/mm.h b/include/linux/mm.h index a07e93adb8ad..d750be768121 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -4161,10 +4161,37 @@ static inline void pgalloc_tag_split(struct folio *folio, int old_order, int new } } } + +static inline void pgalloc_tag_copy(struct folio *new, struct folio *old) +{ + struct alloc_tag *tag; + union codetag_ref *ref; + + tag = pgalloc_tag_get(&old->page); + if (!tag) + return; + + ref = get_page_tag_ref(&new->page); + if (!ref) + return; + + /* Clear the old ref to the original allocation tag. */ + clear_page_tag_ref(&old->page); + /* Decrement the counters of the tag on get_new_folio. */ + alloc_tag_sub(ref, folio_nr_pages(new)); + + __alloc_tag_ref_set(ref, tag); + + put_page_tag_ref(ref); +} #else /* !CONFIG_MEM_ALLOC_PROFILING */ static inline void pgalloc_tag_split(struct folio *folio, int old_order, int new_order) { } + +static inline void pgalloc_tag_copy(struct folio *new, struct folio *old) +{ +} #endif /* CONFIG_MEM_ALLOC_PROFILING */ #endif /* _LINUX_MM_H */ diff --git a/mm/migrate.c b/mm/migrate.c index 0f6b78fd73aa..dfdb3a136bf8 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -743,6 +743,7 @@ void folio_migrate_flags(struct folio *newfolio, struct folio *folio) folio_set_readahead(newfolio); folio_copy_owner(newfolio, folio); + pgalloc_tag_copy(newfolio, folio); mem_cgroup_migrate(folio, newfolio); } -- 2.46.0.469.g59c65b2a67-goog

1 year

1
0
0 0

[PATCH mm-unstable v2 2/3] mm/codetag: fix pgalloc_tag_split()

by Yu Zhao

The current assumption is that a large folio can only be split into order-0 folios. That is not the case for hugeTLB demotion, nor for THP split: see commit c010d47f107f ("mm: thp: split huge page to any lower order pages"). When a large folio is split into ones of a lower non-zero order, only the new head pages should be tagged. Tagging tail pages can cause imbalanced "calls" counters, since only head pages are untagged by pgalloc_tag_sub() and the "calls" counts on tail pages are leaked, e.g., # echo 2048kB >/sys/kernel/mm/hugepages/hugepages-1048576kB/demote_size # echo 700 >/sys/kernel/mm/hugepages/hugepages-1048576kB/nr_hugepages # time echo 700 >/sys/kernel/mm/hugepages/hugepages-1048576kB/demote # echo 0 >/sys/kernel/mm/hugepages/hugepages-2048kB/nr_hugepages # grep alloc_gigantic_folio /proc/allocinfo Before this patch: 0 549427200 mm/hugetlb.c:1549 func:alloc_gigantic_folio real 0m2.057s user 0m0.000s sys 0m2.051s After this patch: 0 0 mm/hugetlb.c:1549 func:alloc_gigantic_folio real 0m1.711s user 0m0.000s sys 0m1.704s Not tagging tail pages also improves the splitting time, e.g., by about 15% when demoting 1GB hugeTLB folios to 2MB ones, as shown above. Fixes: be25d1d4e822 ("mm: create new codetag references during page splitting") Signed-off-by: Yu Zhao <yuzhao(a)google.com> Acked-by: Suren Baghdasaryan <surenb(a)google.com> Cc: <stable(a)vger.kernel.org> --- include/linux/mm.h | 30 ++++++++++++++++++++++++++++++ include/linux/pgalloc_tag.h | 31 ------------------------------- mm/huge_memory.c | 2 +- mm/hugetlb.c | 2 +- mm/page_alloc.c | 4 ++-- 5 files changed, 34 insertions(+), 35 deletions(-) diff --git a/include/linux/mm.h b/include/linux/mm.h index b31d4bdd65ad..a07e93adb8ad 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -4137,4 +4137,34 @@ void vma_pgtable_walk_end(struct vm_area_struct *vma); int reserve_mem_find_by_name(const char *name, phys_addr_t *start, phys_addr_t *size); +#ifdef CONFIG_MEM_ALLOC_PROFILING +static inline void pgalloc_tag_split(struct folio *folio, int old_order, int new_order) +{ + int i; + struct alloc_tag *tag; + unsigned int nr_pages = 1 << new_order; + + if (!mem_alloc_profiling_enabled()) + return; + + tag = pgalloc_tag_get(&folio->page); + if (!tag) + return; + + for (i = nr_pages; i < (1 << old_order); i += nr_pages) { + union codetag_ref *ref = get_page_tag_ref(folio_page(folio, i)); + + if (ref) { + /* Set new reference to point to the original tag */ + alloc_tag_ref_set(ref, tag); + put_page_tag_ref(ref); + } + } +} +#else /* !CONFIG_MEM_ALLOC_PROFILING */ +static inline void pgalloc_tag_split(struct folio *folio, int old_order, int new_order) +{ +} +#endif /* CONFIG_MEM_ALLOC_PROFILING */ + #endif /* _LINUX_MM_H */ diff --git a/include/linux/pgalloc_tag.h b/include/linux/pgalloc_tag.h index 207f0c83c8e9..59a3deb792a8 100644 --- a/include/linux/pgalloc_tag.h +++ b/include/linux/pgalloc_tag.h @@ -80,36 +80,6 @@ static inline void pgalloc_tag_sub(struct page *page, unsigned int nr) } } -static inline void pgalloc_tag_split(struct page *page, unsigned int nr) -{ - int i; - struct page_ext *first_page_ext; - struct page_ext *page_ext; - union codetag_ref *ref; - struct alloc_tag *tag; - - if (!mem_alloc_profiling_enabled()) - return; - - first_page_ext = page_ext = page_ext_get(page); - if (unlikely(!page_ext)) - return; - - ref = codetag_ref_from_page_ext(page_ext); - if (!ref->ct) - goto out; - - tag = ct_to_alloc_tag(ref->ct); - page_ext = page_ext_next(page_ext); - for (i = 1; i < nr; i++) { - /* Set new reference to point to the original tag */ - alloc_tag_ref_set(codetag_ref_from_page_ext(page_ext), tag); - page_ext = page_ext_next(page_ext); - } -out: - page_ext_put(first_page_ext); -} - static inline struct alloc_tag *pgalloc_tag_get(struct page *page) { struct alloc_tag *tag = NULL; @@ -142,7 +112,6 @@ static inline void clear_page_tag_ref(struct page *page) {} static inline void pgalloc_tag_add(struct page *page, struct task_struct *task, unsigned int nr) {} static inline void pgalloc_tag_sub(struct page *page, unsigned int nr) {} -static inline void pgalloc_tag_split(struct page *page, unsigned int nr) {} static inline struct alloc_tag *pgalloc_tag_get(struct page *page) { return NULL; } static inline void pgalloc_tag_sub_pages(struct alloc_tag *tag, unsigned int nr) {} diff --git a/mm/huge_memory.c b/mm/huge_memory.c index fdc83b0c9e71..2a73efea02d7 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -3242,7 +3242,7 @@ static void __split_huge_page(struct page *page, struct list_head *list, /* Caller disabled irqs, so they are still disabled here */ split_page_owner(head, order, new_order); - pgalloc_tag_split(head, 1 << order); + pgalloc_tag_split(folio, order, new_order); /* See comment in __split_huge_page_tail() */ if (folio_test_anon(folio)) { diff --git a/mm/hugetlb.c b/mm/hugetlb.c index 2a73753ecf9e..5c77defad295 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -3795,7 +3795,7 @@ static long demote_free_hugetlb_folios(struct hstate *src, struct hstate *dst, list_del(&folio->lru); split_page_owner(&folio->page, huge_page_order(src), huge_page_order(dst)); - pgalloc_tag_split(&folio->page, 1 << huge_page_order(src)); + pgalloc_tag_split(folio, huge_page_order(src), huge_page_order(dst)); for (i = 0; i < pages_per_huge_page(src); i += pages_per_huge_page(dst)) { struct page *page = folio_page(folio, i); diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 6b003f57965d..88113fdba956 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -2783,7 +2783,7 @@ void split_page(struct page *page, unsigned int order) for (i = 1; i < (1 << order); i++) set_page_refcounted(page + i); split_page_owner(page, order, 0); - pgalloc_tag_split(page, 1 << order); + pgalloc_tag_split(page_folio(page), order, 0); split_page_memcg(page, order, 0); } EXPORT_SYMBOL_GPL(split_page); @@ -4981,7 +4981,7 @@ static void *make_alloc_exact(unsigned long addr, unsigned int order, struct page *last = page + nr; split_page_owner(page, order, 0); - pgalloc_tag_split(page, 1 << order); + pgalloc_tag_split(page_folio(page), order, 0); split_page_memcg(page, order, 0); while (page < --last) set_page_refcounted(last); -- 2.46.0.469.g59c65b2a67-goog

1 year

1
0
0 0

[PATCH v2] NFSv4: fix a mount deadlock in NFS v4.1 client

by Oleksandr Tymoshenko

nfs41_init_clientid does not signal a failure condition from nfs4_proc_exchange_id and nfs4_proc_create_session to a client which may lead to mount syscall indefinitely blocked in the following stack trace: nfs_wait_client_init_complete nfs41_discover_server_trunking nfs4_discover_server_trunking nfs4_init_client nfs4_set_client nfs4_create_server nfs4_try_get_tree vfs_get_tree do_new_mount __se_sys_mount and the client stuck in uninitialized state. In addition to this all subsequent mount calls would also get blocked in nfs_match_client waiting for the uninitialized client to finish initialization: nfs_wait_client_init_complete nfs_match_client nfs_get_client nfs4_set_client nfs4_create_server nfs4_try_get_tree vfs_get_tree do_new_mount __se_sys_mount To avoid this situation propagate error condition to the mount thread and let mount syscall fail properly. To: Trond Myklebust <trondmy(a)kernel.org> To: Anna Schumaker <anna(a)kernel.org> Cc: linux-nfs(a)vger.kernel.org Cc: jbongio(a)google.com Cc: stable(a)vger.kernel.org Link: https://lore.kernel.org/stable/20240906-nfs-mount-deadlock-fix-v1-1-ea1aef5… Signed-off-by: Oleksandr Tymoshenko <ovt(a)google.com> --- Changes in v2: - Added correct To/Cc entries to the commit message - Link to v1: https://lore.kernel.org/r/20240906-nfs-mount-deadlock-fix-v1-1-ea1aef533f9c… --- fs/nfs/nfs4state.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c index 877f682b45f2..54ad3440ad2b 100644 --- a/fs/nfs/nfs4state.c +++ b/fs/nfs/nfs4state.c @@ -335,8 +335,8 @@ int nfs41_init_clientid(struct nfs_client *clp, const struct cred *cred) if (!(clp->cl_exchange_flags & EXCHGID4_FLAG_CONFIRMED_R)) nfs4_state_start_reclaim_reboot(clp); nfs41_finish_session_reset(clp); - nfs_mark_client_ready(clp, NFS_CS_READY); out: + nfs_mark_client_ready(clp, status == 0 ? NFS_CS_READY : status); return status; } --- base-commit: ad618736883b8970f66af799e34007475fe33a68 change-id: 20240906-nfs-mount-deadlock-fix-55c14b38e088 Best regards, -- Oleksandr Tymoshenko <ovt(a)google.com>

1 year

1
0
0 0

[PATCH] usb: cdnsp: Fix incorrect usb_request status

by Pawel Laszczak

Fix changes incorrect usb_request->status returned during disabling endpoints. Before fix the status returned during dequeuing requests while disabling endpoint was ECONNRESET. Patch changes it to ESHUTDOWN. Fixes: 3d82904559f4 ("usb: cdnsp: cdns3 Add main part of Cadence USBSSP DRD Driver") cc: stable(a)vger.kernel.org Signed-off-by: Pawel Laszczak <pawell(a)cadence.com> --- drivers/usb/cdns3/cdnsp-ring.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/usb/cdns3/cdnsp-ring.c b/drivers/usb/cdns3/cdnsp-ring.c index 1e011560e3ae..bccc8fc143d0 100644 --- a/drivers/usb/cdns3/cdnsp-ring.c +++ b/drivers/usb/cdns3/cdnsp-ring.c @@ -718,7 +718,8 @@ int cdnsp_remove_request(struct cdnsp_device *pdev, seg = cdnsp_trb_in_td(pdev, cur_td->start_seg, cur_td->first_trb, cur_td->last_trb, hw_deq); - if (seg && (pep->ep_state & EP_ENABLED)) + if (seg && (pep->ep_state & EP_ENABLED) && + !(pep->ep_state & EP_DIS_IN_RROGRESS)) cdnsp_find_new_dequeue_state(pdev, pep, preq->request.stream_id, cur_td, &deq_state); else @@ -736,7 +737,8 @@ int cdnsp_remove_request(struct cdnsp_device *pdev, * During disconnecting all endpoint will be disabled so we don't * have to worry about updating dequeue pointer. */ - if (pdev->cdnsp_state & CDNSP_STATE_DISCONNECT_PENDING) { + if (pdev->cdnsp_state & CDNSP_STATE_DISCONNECT_PENDING || + pep->ep_state & EP_DIS_IN_RROGRESS) { status = -ESHUTDOWN; ret = cdnsp_cmd_set_deq(pdev, pep, &deq_state); } -- 2.43.0

1 year

2
3
0 0

2025

2024

2023

2022

2021

2020

2019

2018

2017

Linux-stable-mirror September 2024