From: Daniel Thompson <daniel.thompson@linaro.org>
To: Russell King <linux@arm.linux.org.uk>,
Will Deacon <will.deacon@arm.com>,
Catalin Marinas <catalin.marinas@arm.com>
Cc: Daniel Thompson <daniel.thompson@linaro.org>,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
Paul Mackerras <paulus@samba.org>, Ingo Molnar <mingo@redhat.com>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
patches@linaro.org, linaro-kernel@lists.linaro.org,
John Stultz <john.stultz@linaro.org>,
Sumit Semwal <sumit.semwal@linaro.org>
Subject: [PATCH v2 0/2] arm+arm64: perf: Prevent wraparound during overflow
Date: Fri, 21 Nov 2014 16:24:25 +0000 [thread overview]
Message-ID: <1416587067-3220-1-git-send-email-daniel.thompson@linaro.org> (raw)
In-Reply-To: <1416412346-8759-1-git-send-email-daniel.thompson@linaro.org>
This patchset fixes problems on arm and arm64 when the PMU counters wrap
around and become larger than the value originally programmed into them.
The problem was observed and fixed on arm but the perf code is,
rather to my surprise, sufficiently similar on arm64 that the fix still
makes sense there too.
v2:
* Remove the redundant cast to s64 (Will Deacon).
Daniel Thompson (2):
arm: perf: Prevent wraparound during overflow
arm64: perf: Prevent wraparound during overflow
arch/arm/kernel/perf_event.c | 10 ++++++++--
arch/arm64/kernel/perf_event.c | 10 ++++++++--
2 files changed, 16 insertions(+), 4 deletions(-)
--
1.9.3
next prev parent reply other threads:[~2014-11-21 16:24 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-19 15:52 [PATCH] arm: perf: Prevent wraparound during overflow Daniel Thompson
2014-11-19 18:11 ` Will Deacon
2014-11-20 12:14 ` Daniel Thompson
2014-11-21 16:24 ` Daniel Thompson [this message]
2014-11-21 16:24 ` [PATCH v2 1/2] " Daniel Thompson
2014-12-04 10:26 ` Will Deacon
2014-12-04 13:58 ` Daniel Thompson
2015-01-05 14:57 ` Peter Zijlstra
2015-01-05 19:31 ` Daniel Thompson
2015-01-06 19:46 ` Will Deacon
2014-11-21 16:24 ` [PATCH v2 2/2] arm64: " Daniel Thompson
2014-12-04 10:27 ` Will Deacon
2014-12-22 9:39 ` [PATCH 3.19-rc1 v3] arm: " Daniel Thompson
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