Re: [PATCH v2 5/8] perf auxtrace: Change to use SMP memory barriers

[PATCH v2 0/8] perf: Refine barriers for AUX ring buffer · Leo Yan <hidden> · 2021-06-02
[PATCH v2 1/8] perf/ring_buffer: Add comment for barriers on AUX ring buffer · Leo Yan <hidden> · 2021-06-02
Re: [PATCH v2 1/8] perf/ring_buffer: Add comment for barriers on AUX ring buffer · Peter Zijlstra <peterz@infradead.org> · 2021-06-07
[PATCH v2 2/8] coresight: tmc-etr: Add barrier after updating AUX ring buffer · Leo Yan <hidden> · 2021-06-02
[PATCH v2 3/8] coresight: tmc-etf: Add comment for store ordering · Leo Yan <hidden> · 2021-06-02
[PATCH v2 4/8] perf/x86: Add barrier after updating bts · Leo Yan <hidden> · 2021-06-02
Re: [PATCH v2 4/8] perf/x86: Add barrier after updating bts · Peter Zijlstra <peterz@infradead.org> · 2021-06-07
[PATCH v2 5/8] perf auxtrace: Change to use SMP memory barriers · Leo Yan <hidden> · 2021-06-02
Re: [PATCH v2 5/8] perf auxtrace: Change to use SMP memory barriers · Adrian Hunter <adrian.hunter@intel.com> · 2021-06-07
Re: [PATCH v2 5/8] perf auxtrace: Change to use SMP memory barriers · Peter Zijlstra <peterz@infradead.org> · 2021-06-07
Re: [PATCH v2 5/8] perf auxtrace: Change to use SMP memory barriers · Arnaldo Carvalho de Melo <acme@kernel.org> · 2021-06-08
[PATCH v2 6/8] perf auxtrace: Drop legacy __sync functions · Leo Yan <hidden> · 2021-06-02
Re: [PATCH v2 6/8] perf auxtrace: Drop legacy __sync functions · Adrian Hunter <adrian.hunter@intel.com> · 2021-06-02
Re: [PATCH v2 6/8] perf auxtrace: Drop legacy __sync functions · Leo Yan <hidden> · 2021-06-02
Re: [PATCH v2 6/8] perf auxtrace: Drop legacy __sync functions · Adrian Hunter <adrian.hunter@intel.com> · 2021-06-02
Re: [PATCH v2 6/8] perf auxtrace: Drop legacy __sync functions · Leo Yan <hidden> · 2021-06-02
[PATCH v2 7/8] perf auxtrace: Use WRITE_ONCE() for updating aux_tail · Leo Yan <hidden> · 2021-06-02
Re: [PATCH v2 7/8] perf auxtrace: Use WRITE_ONCE() for updating aux_tail · Adrian Hunter <adrian.hunter@intel.com> · 2021-06-07
Re: [PATCH v2 7/8] perf auxtrace: Use WRITE_ONCE() for updating aux_tail · Peter Zijlstra <peterz@infradead.org> · 2021-06-07
Re: [PATCH v2 7/8] perf auxtrace: Use WRITE_ONCE() for updating aux_tail · Arnaldo Carvalho de Melo <acme@kernel.org> · 2021-06-08
Re: [PATCH v2 7/8] perf auxtrace: Use WRITE_ONCE() for updating aux_tail · Leo Yan <hidden> · 2021-06-09
[PATCH v2 8/8] perf record: Directly bail out for compat case · Leo Yan <hidden> · 2021-06-02
Re: [PATCH v2 8/8] perf record: Directly bail out for compat case · Adrian Hunter <adrian.hunter@intel.com> · 2021-06-02
Re: [PATCH v2 8/8] perf record: Directly bail out for compat case · Leo Yan <hidden> · 2021-06-02
Re: [PATCH v2 8/8] perf record: Directly bail out for compat case · Adrian Hunter <adrian.hunter@intel.com> · 2021-06-07
Re: [PATCH v2 8/8] perf record: Directly bail out for compat case · Leo Yan <hidden> · 2021-06-07
Re: [PATCH v2 8/8] perf record: Directly bail out for compat case · Adrian Hunter <adrian.hunter@intel.com> · 2021-06-09
Re: [PATCH v2 8/8] perf record: Directly bail out for compat case · Leo Yan <hidden> · 2021-06-09

From: Peter Zijlstra <peterz@infradead.org>
Date: 2021-06-07 15:31:31
Also in: linux-perf-users, lkml

On Wed, Jun 02, 2021 at 06:30:04PM +0800, Leo Yan wrote:

The kernel and the userspace tool can access the AUX ring buffer head
and tail from different CPUs, thus SMP class of barriers are required
on SMP system.

This patch changes to use SMP barriers to replace mb() and rmb()
barriers.

Signed-off-by: Leo Yan <redacted>

Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

`h`	back out one level
`j`	next message in thread
`k`	previous message in thread
`l`	drill in
`Esc`	close help / fold thread tree
`?`	toggle this help