From: "Pekka Enberg" <penberg@cs.helsinki.fi>
To: Christoph Lameter <clameter@sgi.com>
Cc: Arjan van de Ven <arjan@infradead.org>,
Ingo Molnar <mingo@elte.hu>,
akpm@linux-foundation.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org,
Linus Torvalds <torvalds@linux-foundation.org>,
Peter Zijlstra <a.p.zijlstra@chello.nl>
Subject: Re: [2/2] vmallocinfo: Add caller information
Date: Tue, 29 Apr 2008 22:29:01 +0300 [thread overview]
Message-ID: <84144f020804291229t55d207afk97457f14175ebe18@mail.gmail.com> (raw)
In-Reply-To: <84144f020804291223x6e40509fk8461ed4d96d443b@mail.gmail.com>
On Tue, Apr 29, 2008 at 10:09 PM, Christoph Lameter <clameter@sgi.com> wrote:
> > Well so we display out of whack backtraces? There are also issues on
> > platforms that do not have a stack in the classic sense (rotating register
> > file on IA64 and Sparc64 f.e.). Determining a backtrace can be very
> > expensive.
On Tue, Apr 29, 2008 at 10:23 PM, Pekka Enberg <penberg@cs.helsinki.fi> wrote:
> I think that's the key question here whether we need to enable this on
> production systems? If yes, why? If it's just a debugging aid, then I
> see Ingo's point of save_stack_trace(); otherwise the low-overhead
> __builtin_return_address() makes more sense.
Actually, this is vmalloc() so why do we even care? If there are
callers in the tree that use vmalloc() for performance sensitive
stuff, they ought to be converted to kmalloc() anyway, no?
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next prev parent reply other threads:[~2008-04-29 19:29 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-03-18 22:27 [0/2] vmalloc: Add /proc/vmallocinfo to display mappings Christoph Lameter
2008-03-18 22:27 ` [1/2] vmalloc: Show vmalloced areas via /proc/vmallocinfo Christoph Lameter
2008-03-20 4:04 ` Arjan van de Ven
2008-03-20 19:22 ` Christoph Lameter
2008-03-21 22:19 ` Andrew Morton
2008-03-21 22:09 ` Alan Cox
2008-03-18 22:27 ` [2/2] vmallocinfo: Add caller information Christoph Lameter
2008-03-19 21:42 ` Ingo Molnar
2008-03-20 0:03 ` Christoph Lameter
2008-03-21 11:00 ` Ingo Molnar
2008-03-21 17:35 ` Christoph Lameter
2008-03-21 18:45 ` Ingo Molnar
2008-03-21 19:16 ` Christoph Lameter
2008-03-21 20:55 ` Ingo Molnar
2008-03-22 2:40 ` Mike Frysinger
2008-04-29 8:48 ` Ingo Molnar
2008-04-29 17:08 ` Christoph Lameter
2008-04-28 19:48 ` Arjan van de Ven
2008-04-29 18:49 ` Christoph Lameter
2008-04-28 21:00 ` Arjan van de Ven
2008-04-29 19:09 ` Christoph Lameter
2008-04-29 19:23 ` Pekka Enberg
2008-04-29 19:29 ` Pekka Enberg [this message]
2008-04-29 19:29 ` Ingo Molnar
2008-03-19 2:23 ` [0/2] vmalloc: Add /proc/vmallocinfo to display mappings KOSAKI Motohiro
2008-03-19 22:07 ` Andrew Morton
2008-03-19 23:33 ` Christoph Lameter
2008-03-20 7:43 ` KOSAKI Motohiro
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