From: Frederic Weisbecker <fweisbec@gmail.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: LKML <linux-kernel@vger.kernel.org>, Ingo Molnar <mingo@elte.hu>,
Arnaldo Carvalho de Melo <acme@redhat.com>,
Paul Mackerras <paulus@samba.org>,
Stephane Eranian <eranian@google.com>,
David Miller <davem@davemloft.net>,
Paul Mundt <lethal@linux-sh.org>,
Will Deacon <will.deacon@arm.com>, Borislav Petkov <bp@amd64.org>
Subject: Re: [RFC PATCH 3/6] perf: Generalize some arch callchain code
Date: Thu, 1 Jul 2010 17:49:34 +0200 [thread overview]
Message-ID: <20100701154922.GC10616@nowhere> (raw)
In-Reply-To: <1277999161.1917.216.camel@laptop>
On Thu, Jul 01, 2010 at 05:46:01PM +0200, Peter Zijlstra wrote:
> On Thu, 2010-07-01 at 17:35 +0200, Frederic Weisbecker wrote:
> > - Most archs use one callchain buffer per cpu, except x86 that needs
> > to deal with NMIs. Provide a default perf_callchain_buffer()
> > implementation that x86 overrides.
>
> sparc and power also have NMI like contexts.
Ah and the comments suggest it's because pmu interrupts can't nest or so.
Anyway, that's notwithstanding the race that 5th patch fixes.
next prev parent reply other threads:[~2010-07-01 15:49 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-01 15:35 [RFC PATCH 0/6] perf: cleanup and fixes Frederic Weisbecker
2010-07-01 15:35 ` [RFC PATCH 1/6] perf: Drop unappropriate tests on arch callchains Frederic Weisbecker
2010-07-01 15:35 ` [RFC PATCH 2/6] perf: Generalize callchain_store() Frederic Weisbecker
2010-07-01 15:35 ` [RFC PATCH 3/6] perf: Generalize some arch callchain code Frederic Weisbecker
2010-07-01 15:46 ` Peter Zijlstra
2010-07-01 15:47 ` Frederic Weisbecker
2010-07-01 15:49 ` Frederic Weisbecker [this message]
2010-07-01 15:51 ` Peter Zijlstra
2010-07-01 15:53 ` Frederic Weisbecker
2010-07-01 15:36 ` [RFC PATCH 4/6] perf: Factorize callchain context handling Frederic Weisbecker
2010-07-01 15:36 ` [RFC PATCH 5/6] perf: Fix race in callchains Frederic Weisbecker
2010-07-01 15:42 ` Frederic Weisbecker
2010-07-02 18:07 ` Peter Zijlstra
2010-07-03 20:28 ` Frederic Weisbecker
2010-07-01 15:36 ` [RFC PATCH 6/6] perf: Fix double put_ctx Frederic Weisbecker
-- strict thread matches above, loose matches on Subject: below --
2010-08-16 20:48 [RFC PATCH 0/0 v3] callchain fixes and cleanups Frederic Weisbecker
2010-08-16 20:48 ` [RFC PATCH 3/6] perf: Generalize some arch callchain code Frederic Weisbecker
2010-08-17 3:46 ` Paul Mackerras
2010-08-18 3:51 ` Frederic Weisbecker
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