From: Christoph Lameter <cl@linux-foundation.org>
To: "Frank Ch. Eigler" <fche@redhat.com>
Cc: Steven Rostedt <rostedt@goodmis.org>,
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 10:48:29 -0500 [thread overview]
Message-ID: <48A05F4D.4080404@linux-foundation.org> (raw)
In-Reply-To: <y0mhc9ra7m6.fsf@ton.toronto.redhat.com>
Frank Ch. Eigler wrote:
> Christoph Lameter <cl@linux-foundation.org> writes:
>
>> [...]
>>> 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.
>
> Are you talking about the tests that implement checking whether a
> marker is active or not? Those checks are already efficient, and will
> get more so with the "immediate values" optimization in or near the
> tree.
AFAICT: Each test also adds an out of line call to the tracing facility.
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next prev parent reply other threads:[~2008-08-11 15:48 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
2008-08-11 15:34 ` Frank Ch. Eigler
2008-08-11 15:48 ` Christoph Lameter [this message]
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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