From: "Frank Ch. Eigler" <fche@redhat.com>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>,
Ingo Molnar <mingo@elte.hu>, Paul Mackerras <paulus@samba.org>,
Arnaldo Carvalho de Melo <acme@infradead.org>,
Frederic Weisbecker <fweisbec@gmail.com>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 01/10] perf, trace: Remove IRQ-disable from perf/tracepoint interaction
Date: Fri, 21 May 2010 14:07:13 -0400 [thread overview]
Message-ID: <20100521180713.GA12662@redhat.com> (raw)
In-Reply-To: <1274464380.26328.3992.camel@gandalf.stny.rr.com>
Hi -
On Fri, May 21, 2010 at 01:53:00PM -0400, Steven Rostedt wrote:
> [...]
> > > - struct pt_regs *__regs = &get_cpu_var(perf_trace_regs); \
> > > - [...]
> > > + struct pt_regs __regs; \
> > > [...]
> >
> > To what extent are you worried about something the size of struct
> > pt_regs being auto/stack allocated?
>
> Isn't pt_regs already allocated on the stack when interrupted?
Maybe, but here we're about to ask for another multi-hundred-byte one.
Does your stack-frame-size ftrace widget gripe about this change?
- FChE
next prev parent reply other threads:[~2010-05-21 18:07 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-21 9:02 [PATCH 00/10] perf tracepoint and output optimizations Peter Zijlstra
2010-05-21 9:02 ` [PATCH 01/10] perf, trace: Remove IRQ-disable from perf/tracepoint interaction Peter Zijlstra
2010-05-21 17:43 ` Frank Ch. Eigler
2010-05-21 17:53 ` Steven Rostedt
2010-05-21 18:07 ` Frank Ch. Eigler [this message]
2010-05-23 12:11 ` Paul Mackerras
2010-05-23 18:16 ` Peter Zijlstra
2010-05-24 4:29 ` Paul Mackerras
2010-05-25 8:06 ` [tip:perf/core] perf, trace: Fix IRQ-disable removal " tip-bot for Peter Zijlstra
2010-05-25 9:02 ` Peter Zijlstra
2010-05-25 9:30 ` [tip:perf/core] perf, trace: Fix !x86 build bug tip-bot for Peter Zijlstra
2010-05-24 11:31 ` [PATCH 01/10] perf, trace: Remove IRQ-disable from perf/tracepoint interaction Frederic Weisbecker
2010-05-25 7:30 ` [PATCH 01a/10] perf, trace: Fix !x86 build issue Peter Zijlstra
2010-05-21 9:02 ` [PATCH 02/10] perf, trace: Use per-tracepoint-per-cpu hlist to track events Peter Zijlstra
2010-05-21 9:40 ` Frederic Weisbecker
2010-05-21 10:02 ` Peter Zijlstra
2010-05-21 10:13 ` Frederic Weisbecker
2010-05-21 10:15 ` Peter Zijlstra
2010-05-21 10:19 ` Frederic Weisbecker
2010-05-21 10:38 ` Ingo Molnar
2010-05-21 10:51 ` Ingo Molnar
2010-05-21 10:19 ` Peter Zijlstra
2010-05-21 10:21 ` Frederic Weisbecker
2010-05-21 10:34 ` Peter Zijlstra
2010-05-21 10:38 ` Frederic Weisbecker
2010-05-21 10:41 ` [PATCH 02b/10] perf, trace: Fix probe unregister race Peter Zijlstra
2010-05-21 10:43 ` Frederic Weisbecker
2010-05-31 7:19 ` [tip:perf/urgent] perf_events, " tip-bot for Peter Zijlstra
2010-05-21 11:28 ` [tip:perf/core] perf, trace: Optimize tracepoints by using per-tracepoint-per-cpu hlist to track events tip-bot for Peter Zijlstra
2010-05-21 14:04 ` [PATCH 02/10] perf, trace: Use " Steven Rostedt
2010-05-21 14:18 ` Peter Zijlstra
2010-05-21 14:25 ` Peter Zijlstra
2010-05-31 7:20 ` [tip:perf/urgent] perf_events, trace: Fix perf_trace_destroy(), mutex went missing tip-bot for Peter Zijlstra
2010-05-21 9:02 ` [PATCH 03/10] perf: Ensure IOC_OUTPUT isnt used to create multi-writer buffers Peter Zijlstra
2010-05-21 11:28 ` [tip:perf/core] perf: Ensure that IOC_OUTPUT isn't " tip-bot for Peter Zijlstra
2010-05-21 9:02 ` [PATCH 04/10] perf-record: Remove -M Peter Zijlstra
2010-05-21 11:28 ` [tip:perf/core] " tip-bot for Peter Zijlstra
2010-05-21 9:02 ` [PATCH 05/10] perf-record: Share per-cpu buffers Peter Zijlstra
2010-05-21 9:44 ` Frederic Weisbecker
2010-05-21 10:03 ` Peter Zijlstra
2010-05-21 11:29 ` [tip:perf/core] " tip-bot for Peter Zijlstra
2010-05-21 9:02 ` [PATCH 06/10] perf: Fix wakeup storm for RO mmap()s Peter Zijlstra
2010-05-21 11:29 ` [tip:perf/core] " tip-bot for Peter Zijlstra
2010-05-21 9:02 ` [PATCH 07/10] perf: Optimize perf_output_copy Peter Zijlstra
2010-05-21 11:29 ` [tip:perf/core] perf: Optimize perf_output_copy() tip-bot for Peter Zijlstra
2010-05-21 9:02 ` [PATCH 08/10] perf: Optimize the !vmalloc backed buffer Peter Zijlstra
2010-05-21 11:29 ` [tip:perf/core] " tip-bot for Peter Zijlstra
2010-05-21 9:02 ` [PATCH 09/10] perf: Remove more fastpath code Peter Zijlstra
2010-05-21 11:15 ` Steven Rostedt
2010-05-21 11:18 ` Peter Zijlstra
2010-05-21 11:30 ` [tip:perf/core] perf: Remove more code from the fastpath tip-bot for Peter Zijlstra
2010-05-21 9:02 ` [PATCH 10/10] perf: Optimize perf_tp_event_match Peter Zijlstra
2010-05-21 11:30 ` [tip:perf/core] perf: Optimize perf_tp_event_match() tip-bot for Peter Zijlstra
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