From: Christoph Lameter <cl@linux-foundation.org>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>,
Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro>,
mathieu.desnoyers@polymtl.ca, linux-mm@kvack.org,
linux-kernel@vger.kernel.org, rdunlap@xenotime.net,
mpm@selenic.com, tglx@linutronix.de
Subject: Re: [PATCH 4/5] kmemtrace: SLUB hooks.
Date: Mon, 11 Aug 2008 09:37:54 -0500 [thread overview]
Message-ID: <48A04EC2.1080302@linux-foundation.org> (raw)
In-Reply-To: <alpine.DEB.1.10.0808111027370.29861@gandalf.stny.rr.com>
Steven Rostedt wrote:
> The kmemtrace_mark_alloc_node itself is an inline function, which calls
> another inline function "trace_mark" which is designed to test a
> read_mostly variable, and will do an "unlikely" jmp if the variable is
> set (which it is when tracing is enabled), to the actual function call.
>
> There should be no extra function calls when this is configured on but
> tracing disabled. We try very hard to keep the speed of the tracer as
> close to a non tracing kernel as possible when tracing is disabled.
Makes sense. But then we have even more code bloat because of the tests that
are inserted in all call sites of kmalloc.
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next prev parent reply other threads:[~2008-08-11 14:37 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-08-10 17:14 [PATCH 0/5] kmemtrace Eduard - Gabriel Munteanu
2008-08-10 17:14 ` [PATCH 1/5] kmemtrace: Core implementation Eduard - Gabriel Munteanu
2008-08-10 17:14 ` [PATCH 2/5] kmemtrace: Additional documentation Eduard - Gabriel Munteanu
2008-08-10 17:14 ` [PATCH 3/5] kmemtrace: SLAB hooks Eduard - Gabriel Munteanu
2008-08-10 17:14 ` [PATCH 4/5] kmemtrace: SLUB hooks Eduard - Gabriel Munteanu
2008-08-10 17:14 ` [PATCH 5/5] kmemtrace: SLOB hooks Eduard - Gabriel Munteanu
2008-08-10 17:48 ` Pekka Enberg
2008-08-10 23:18 ` Matt Mackall
2008-08-12 6:46 ` Pekka Enberg
2008-08-11 14:04 ` [PATCH 4/5] kmemtrace: SLUB hooks Christoph Lameter
2008-08-11 14:09 ` Pekka Enberg
2008-08-11 14:13 ` Christoph Lameter
2008-08-11 14:16 ` Pekka Enberg
2008-08-11 14:21 ` Christoph Lameter
2008-08-11 14:22 ` Pekka Enberg
2008-08-12 15:29 ` Eduard - Gabriel Munteanu
2008-08-12 15:43 ` Mathieu Desnoyers
2008-08-13 2:09 ` Matt Mackall
2008-08-11 14:36 ` Steven Rostedt
2008-08-11 18:28 ` Mathieu Desnoyers
2008-08-11 14:30 ` Steven Rostedt
2008-08-11 14:37 ` Christoph Lameter [this message]
2008-08-11 15:34 ` Frank Ch. Eigler
2008-08-11 15:48 ` Christoph Lameter
2008-08-11 15:54 ` Steven Rostedt
2008-08-11 15:57 ` Frank Ch. Eigler
2008-08-11 18:29 ` Mathieu Desnoyers
2008-08-12 15:25 ` Eduard - Gabriel Munteanu
2008-08-12 6:46 ` [PATCH 3/5] kmemtrace: SLAB hooks Pekka Enberg
2008-08-12 6:46 ` [PATCH 2/5] kmemtrace: Additional documentation Pekka Enberg
2008-08-18 19:57 ` Randy Dunlap
2008-08-12 6:46 ` [PATCH 1/5] kmemtrace: Core implementation Pekka Enberg
2008-08-19 17:43 [PATCH 1/5] Revert "kmemtrace: fix printk format warnings" Eduard - Gabriel Munteanu
2008-08-19 17:43 ` [PATCH 2/5] kmemtrace: Better alternative to " Eduard - Gabriel Munteanu
2008-08-19 17:43 ` [PATCH 3/5] SLUB: Replace __builtin_return_address(0) with _RET_IP_ Eduard - Gabriel Munteanu
2008-08-19 17:43 ` [PATCH 4/5] kmemtrace: SLUB hooks Eduard - Gabriel Munteanu
2008-08-19 19:10 ` Pekka Enberg
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