From: Li Zefan <lizf@cn.fujitsu.com>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: linux-kernel@vger.kernel.org, Ingo Molnar <mingo@elte.hu>,
Andrew Morton <akpm@linux-foundation.org>,
Peter Zijlstra <peterz@infradead.org>,
Frederic Weisbecker <fweisbec@gmail.com>,
Christoph Lameter <cl@linux-foundation.org>,
Pekka Enberg <penberg@cs.helsinki.fi>,
Matt Mackall <mpm@selenic.com>,
linux-mm@kvack.org,
Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro>,
Richard Kennedy <richard@rsk.demon.co.uk>
Subject: Re: [RFC][PATCH 2/2] [PATCH 2/2] tracing/slub: Move kmalloc tracepoint out of inline code
Date: Thu, 25 Nov 2010 09:00:46 +0800 [thread overview]
Message-ID: <4CEDB53E.5000203@cn.fujitsu.com> (raw)
In-Reply-To: <20101124212717.468748477@goodmis.org>
Cc: Richard Kennedy <richard@rsk.demon.co.uk>
Steven Rostedt wrote:
> From: Steven Rostedt <srostedt@redhat.com>
>
> The tracepoint for kmalloc is in the slub inlined code which causes
> every instance of kmalloc to have the tracepoint.
>
> This patch moves the tracepoint out of the inline code to the
> slub C file (and to page_alloc), which removes a large number of
> inlined trace points.
>
> objdump -dr vmlinux.slub| grep 'jmpq.*<trace_kmalloc' |wc -l
> 375
> objdump -dr vmlinux.slub.patched| grep 'jmpq.*<trace_kmalloc' |wc -l
> 2
>
> This also has a nice impact on size.
> text data bss dec hex filename
> 7050424 1961068 2482688 11494180 af6324 vmlinux.slub
> 6979599 1944620 2482688 11406907 ae0e3b vmlinux.slub.patched
>
> Siged-off-by: Steven Rostedt <rostedt@goodmis.org>
See this patch from Richard: :)
http://marc.info/?l=linux-kernel&m=128765337729262&w=2
But he only touched slub.
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next prev parent reply other threads:[~2010-11-25 1:05 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-24 21:23 [RFC][PATCH 0/2] Move kmalloc tracepoints out of inlined code Steven Rostedt
2010-11-24 21:23 ` [RFC][PATCH 1/2] [PATCH 1/2] tracing/slab: Move kmalloc tracepoint out of inline code Steven Rostedt
2010-11-24 21:23 ` [RFC][PATCH 2/2] [PATCH 2/2] tracing/slub: " Steven Rostedt
2010-11-25 1:00 ` Li Zefan [this message]
2010-11-25 1:17 ` Steven Rostedt
2010-11-25 6:46 ` Pekka Enberg
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