Based on the discussion [1], this patch series is to refine the memory
barriers for AUX ring buffer.
Patches 01 ~ 04 to address the barriers usage in the kernel. The first
patch is to make clear comment for how to use the barriers between the
data store and aux_head store, this asks the driver to make sure the
data is visible. Patches 02 ~ 04 is to refine the drivers for barriers
after the data store.
Patches 05 ~ 07 is to fix and clean up the memory barries in perf tool
for AUX ring buffer.
Since the 64-bit value's atomicity is not promised on 32-bit perf, the
last patch is to report error and let perf to directly exit for this
case.
Have testes the patches on Arm64 Juno platform.
[1] https://lore.kernel.org/patchwork/patch/1431867/
Leo Yan (8):
perf/ring_buffer: Add comment for barriers on AUX ring buffer
coresight: tmc-etr: Add barrier after updating AUX ring buffer
coresight: tmc-etf: Add comment for store ordering
perf/x86: Add barrier after updating bts
perf auxtrace: Change to use SMP memory barriers
perf auxtrace: Drop legacy __sync functions
perf auxtrace: Use WRITE_ONCE() for updating aux_tail
perf record: Directly bail out for compat case
arch/x86/events/intel/bts.c | 3 +++
.../hwtracing/coresight/coresight-tmc-etf.c | 6 +++++
.../hwtracing/coresight/coresight-tmc-etr.c | 8 ++++++
kernel/events/ring_buffer.c | 9 +++++++
tools/perf/builtin-record.c | 17 ++++++++++++
tools/perf/util/auxtrace.h | 27 +++----------------
6 files changed, 47 insertions(+), 23 deletions(-)
--
2.25.1
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Changes since v3:
* Include fix for snapshot mode
* Fix typo that was in the initial snapshot fix posted to the previous
thread (&& -> &)
James Clark (1):
perf cs-etm: Split Coresight decode by aux records
tools/perf/util/cs-etm.c | 159 ++++++++++++++++++++++++++++++++++++++-
1 file changed, 156 insertions(+), 3 deletions(-)
--
2.28.0
As discussed at:
https://lore.kernel.org/linux-doc/871r9k6rmy.fsf@meer.lwn.net/
It is better to avoid using :doc:`foo` to refer to Documentation/foo.rst, as the
automarkup.py extension should handle it automatically, on most cases.
There are a couple of exceptions to this rule:
1. when :doc: tag is used to point to a kernel-doc DOC: markup;
2. when it is used with a named tag, e. g. :doc:`some name <foo>`;
It should also be noticed that automarkup.py has currently an issue:
if one use a markup like:
Documentation/dev-tools/kunit/api/test.rst
- documents all of the standard testing API excluding mocking
or mocking related features.
or, even:
Documentation/dev-tools/kunit/api/test.rst
documents all of the standard testing API excluding mocking
or mocking related features.
The automarkup.py will simply ignore it. Not sure why. This patch series
avoid the above patterns (which is present only on 4 files), but it would be
nice to have a followup patch fixing the issue at automarkup.py.
On this series:
Patch 1 manually adjust the references inside driver-api/pm/devices.rst,
as there it uses :file:`foo` to refer to some Documentation/ files;
Patch 2 converts a table at Documentation/dev-tools/kunit/api/index.rst
into a list, carefully avoiding the
Patch 3 converts the cross-references at the media documentation, also
avoiding the automarkup.py bug;
Patches 4-34 convert the other occurrences via a replace script. They were
manually edited, in order to honour 80-columns where possible.
I did a diff between the Sphinx 2.4.4 output before and after this patch
series in order to double-check that all converted Documentation/
references will produce <a href=<foo>.rst>foo title</a> tags.
Mauro Carvalho Chehab (34):
docs: devices.rst: better reference documentation docs
docs: dev-tools: kunit: don't use a table for docs name
media: docs: */media/index.rst: don't use ReST doc:`foo`
media: userspace-api: avoid using ReST :doc:`foo` markup
media: driver-api: drivers: avoid using ReST :doc:`foo` markup
media: admin-guide: avoid using ReST :doc:`foo` markup
docs: admin-guide: pm: avoid using ReSt :doc:`foo` markup
docs: admin-guide: hw-vuln: avoid using ReST :doc:`foo` markup
docs: admin-guide: sysctl: avoid using ReST :doc:`foo` markup
docs: block: biodoc.rst: avoid using ReSt :doc:`foo` markup
docs: bpf: bpf_lsm.rst: avoid using ReSt :doc:`foo` markup
docs: core-api: avoid using ReSt :doc:`foo` markup
docs: dev-tools: testing-overview.rst: avoid using ReSt :doc:`foo`
markup
docs: dev-tools: kunit: avoid using ReST :doc:`foo` markup
docs: devicetree: bindings: submitting-patches.rst: avoid using ReSt
:doc:`foo` markup
docs: doc-guide: avoid using ReSt :doc:`foo` markup
docs: driver-api: avoid using ReSt :doc:`foo` markup
docs: driver-api: gpio: using-gpio.rst: avoid using ReSt :doc:`foo`
markup
docs: driver-api: surface_aggregator: avoid using ReSt :doc:`foo`
markup
docs: driver-api: usb: avoid using ReSt :doc:`foo` markup
docs: firmware-guide: acpi: avoid using ReSt :doc:`foo` markup
docs: hwmon: adm1177.rst: avoid using ReSt :doc:`foo` markup
docs: i2c: avoid using ReSt :doc:`foo` markup
docs: kernel-hacking: hacking.rst: avoid using ReSt :doc:`foo` markup
docs: networking: devlink: avoid using ReSt :doc:`foo` markup
docs: PCI: endpoint: pci-endpoint-cfs.rst: avoid using ReSt :doc:`foo`
markup
docs: PCI: pci.rst: avoid using ReSt :doc:`foo` markup
docs: process: submitting-patches.rst: avoid using ReSt :doc:`foo`
markup
docs: security: landlock.rst: avoid using ReSt :doc:`foo` markup
docs: trace: coresight: coresight.rst: avoid using ReSt :doc:`foo`
markup
docs: trace: ftrace.rst: avoid using ReSt :doc:`foo` markup
docs: userspace-api: landlock.rst: avoid using ReSt :doc:`foo` markup
docs: virt: kvm: s390-pv-boot.rst: avoid using ReSt :doc:`foo` markup
docs: x86: avoid using ReSt :doc:`foo` markup
.../PCI/endpoint/pci-endpoint-cfs.rst | 2 +-
Documentation/PCI/pci.rst | 6 +--
.../special-register-buffer-data-sampling.rst | 3 +-
Documentation/admin-guide/media/bt8xx.rst | 15 ++++----
Documentation/admin-guide/media/bttv.rst | 21 ++++++-----
Documentation/admin-guide/media/index.rst | 12 +++---
Documentation/admin-guide/media/saa7134.rst | 3 +-
Documentation/admin-guide/pm/intel_idle.rst | 16 +++++---
Documentation/admin-guide/pm/intel_pstate.rst | 9 +++--
Documentation/admin-guide/sysctl/abi.rst | 2 +-
Documentation/admin-guide/sysctl/kernel.rst | 37 ++++++++++---------
Documentation/block/biodoc.rst | 2 +-
Documentation/bpf/bpf_lsm.rst | 13 ++++---
.../core-api/bus-virt-phys-mapping.rst | 2 +-
Documentation/core-api/dma-api.rst | 5 ++-
Documentation/core-api/dma-isa-lpc.rst | 2 +-
Documentation/core-api/index.rst | 4 +-
Documentation/dev-tools/kunit/api/index.rst | 8 ++--
Documentation/dev-tools/kunit/faq.rst | 2 +-
Documentation/dev-tools/kunit/index.rst | 14 +++----
Documentation/dev-tools/kunit/start.rst | 6 +--
Documentation/dev-tools/kunit/tips.rst | 5 ++-
Documentation/dev-tools/kunit/usage.rst | 8 ++--
Documentation/dev-tools/testing-overview.rst | 16 ++++----
.../bindings/submitting-patches.rst | 11 +++---
Documentation/doc-guide/contributing.rst | 8 ++--
Documentation/driver-api/gpio/using-gpio.rst | 4 +-
Documentation/driver-api/ioctl.rst | 2 +-
.../driver-api/media/drivers/bttv-devel.rst | 2 +-
Documentation/driver-api/media/index.rst | 10 +++--
Documentation/driver-api/pm/devices.rst | 8 ++--
.../surface_aggregator/clients/index.rst | 3 +-
.../surface_aggregator/internal.rst | 15 ++++----
.../surface_aggregator/overview.rst | 6 ++-
Documentation/driver-api/usb/dma.rst | 6 +--
.../acpi/dsd/data-node-references.rst | 3 +-
.../firmware-guide/acpi/dsd/graph.rst | 2 +-
.../firmware-guide/acpi/enumeration.rst | 7 ++--
Documentation/hwmon/adm1177.rst | 3 +-
Documentation/i2c/instantiating-devices.rst | 2 +-
Documentation/i2c/old-module-parameters.rst | 3 +-
Documentation/i2c/smbus-protocol.rst | 4 +-
Documentation/kernel-hacking/hacking.rst | 4 +-
.../networking/devlink/devlink-region.rst | 2 +-
.../networking/devlink/devlink-trap.rst | 4 +-
Documentation/process/submitting-patches.rst | 32 ++++++++--------
Documentation/security/landlock.rst | 3 +-
Documentation/trace/coresight/coresight.rst | 8 ++--
Documentation/trace/ftrace.rst | 2 +-
Documentation/userspace-api/landlock.rst | 11 +++---
.../userspace-api/media/glossary.rst | 2 +-
Documentation/userspace-api/media/index.rst | 12 +++---
Documentation/virt/kvm/s390-pv-boot.rst | 2 +-
Documentation/x86/boot.rst | 4 +-
Documentation/x86/mtrr.rst | 2 +-
55 files changed, 217 insertions(+), 183 deletions(-)
--
2.31.1
