linux-kernel - Re: [PATCH 2.6.18-rc6 00/10] Kernel memory leak detector 0.10

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Message-ID: <b0943d9e0609070137g5384b6dcp1ecff948661cd98@mail.gmail.com>
Date:	Thu, 7 Sep 2006 09:37:58 +0100
From:	"Catalin Marinas" <catalin.marinas@...il.com>
To:	"Michal Piotrowski" <michal.k.k.piotrowski@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2.6.18-rc6 00/10] Kernel memory leak detector 0.10

On 07/09/06, Michal Piotrowski <michal.k.k.piotrowski@...il.com> wrote:
> On 07/09/06, Catalin Marinas <catalin.marinas@...il.com> wrote:
> > On 07/09/06, Michal Piotrowski <michal.k.k.piotrowski@...il.com> wrote:
> > > I get a kernel panic
> > > http://www.stardust.webpages.pl/files/o_bugs/kmemleak-0.10/panic.jpg
> > >
> > > http://www.stardust.webpages.pl/files/o_bugs/kmemleak-0.10/kml-config
> >
> > Well, you set CONFIG_DEBUG_MEMLEAK_HASH_BITS to 32, this means that
> > kmemleak needs to allocate (sizeof(void*) * 2^32) which is 16GB of
> > RAM. I think a maximum of 20 should be enough (I got acceptable
> > results with 16 hash bits, the default value, and it seemed to do
> > better with 18).
>
> CONFIG_DEBUG_MEMLEAK=y
> CONFIG_DEBUG_MEMLEAK_HASH_BITS=8
> CONFIG_DEBUG_MEMLEAK_TRACE_LENGTH=12
> CONFIG_DEBUG_MEMLEAK_PREINIT_OBJECTS=512
> # CONFIG_DEBUG_MEMLEAK_SECONDARY_ALIASES is not set
> # CONFIG_DEBUG_MEMLEAK_TASK_STACKS is not set
> # CONFIG_DEBUG_MEMLEAK_ORPHAN_FREEING is not set
> CONFIG_DEBUG_MEMLEAK_REPORTS_NR=100
> # CONFIG_DEBUG_KEEP_INIT is not set
> # CONFIG_DEBUG_MEMLEAK_TEST is not set
>
> I still get a panic

Is it in the same place? What does the panic text say?

BTW, you should probably enable SECONDARY_ALIASES and TASK_STACKS
above to reduce the number of false positives.

-- 
Catalin
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