From: Peter Zijlstra <peterz@infradead.org>
To: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>, LKML <linux-kernel@vger.kernel.org>,
Arnaldo Carvalho de Melo <acme@redhat.com>,
Paul Mackerras <paulus@samba.org>,
Steven Rostedt <rostedt@goodmis.org>,
Masami Hiramatsu <mhiramat@redhat.com>,
Jason Baron <jbaron@redhat.com>
Subject: Re: [PATCH 1/4] tracing: Use the perf recursion protection from trace event
Date: Sun, 22 Nov 2009 17:50:45 +0100 [thread overview]
Message-ID: <1258908645.28730.813.camel@laptop> (raw)
In-Reply-To: <20091122163714.GD5049@nowhere>
On Sun, 2009-11-22 at 17:37 +0100, Frederic Weisbecker wrote:
> That's cleaner but adds an unnecessary overhead in the trace event
> path. We already disable the interrupts there. That's why I preferred
> to let the caller decide.
The trace path is already far from optimal, so I'd rather penalize that
than the regular swcounter path.
prev parent reply other threads:[~2009-11-22 16:51 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-22 4:21 [PATCH 1/4] tracing: Use the perf recursion protection from trace event Frederic Weisbecker
2009-11-22 4:21 ` [PATCH 2/4] tracing: Forget about the nmi buffer from syscall events Frederic Weisbecker
2009-11-22 8:43 ` [tip:perf/core] tracing: Forget about the NMI buffer for " tip-bot for Frederic Weisbecker
2009-11-22 4:21 ` [PATCH 3/4] hw-breakpoints: Remove x86 specific headers from core file Frederic Weisbecker
2009-11-22 8:43 ` [tip:perf/core] " tip-bot for Frederic Weisbecker
2009-11-22 4:21 ` [PATCH 4/4] hw-breakpoints: Separate the kernel part from breakpoint headers Frederic Weisbecker
2009-11-22 8:43 ` [tip:perf/core] " tip-bot for Frederic Weisbecker
2009-11-22 4:26 ` [PATCH 1/4 v2] tracing: Use the perf recursion protection from trace event Frederic Weisbecker
2009-11-22 8:42 ` [tip:perf/core] " tip-bot for Frederic Weisbecker
2009-11-22 11:24 ` [tip:perf/core] perf_events: Fix modular build tip-bot for Ingo Molnar
2009-11-22 11:00 ` [PATCH 1/4] tracing: Use the perf recursion protection from trace event Peter Zijlstra
2009-11-22 11:22 ` Ingo Molnar
2009-11-22 11:24 ` Peter Zijlstra
2009-11-22 16:37 ` Frederic Weisbecker
2009-11-22 16:50 ` Peter Zijlstra [this message]
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