From: Ingo Molnar <mingo@elte.hu>
To: Valdis.Kletnieks@vt.edu
Cc: Andrew Morton <akpm@osdl.org>, linux-kernel@vger.kernel.org
Subject: Re: 2.6.10-rc2-mm3-V0.7.31-3 memory leak (was Re: Debugging a memory leak
Date: Fri, 26 Nov 2004 02:14:04 +0100 [thread overview]
Message-ID: <20041126011404.GA4189@elte.hu> (raw)
In-Reply-To: <200411250842.iAP8gC6U011822@turing-police.cc.vt.edu>
* Valdis.Kletnieks@vt.edu <Valdis.Kletnieks@vt.edu> wrote:
> On Tue, 23 Nov 2004 15:38:58 PST, Andrew Morton said:
> > Valdis.Kletnieks@vt.edu wrote:
> > >
> > > Any advice how to shoot this one?
> >
> > Manfred's slab leak detector:
>
> Ahh, many thanks - that helped quite a bit. I tracked down the
> problem - it was in Ingo's VP patch.
>
> sys_ioperm() would allocate an 8K bitmap and save it in
> ->io_bitmap_ptr. Then when we hit exit_thread(), Ingo's code would
> zero the pointer and *then* pass the freshly-zero'ed pointer to
> kfree() - which of course did nothing particularly interesting. My
> fix was to save a copy of the pointer to pass to kfree. Am seeing no
> more leaks.
ah ... good catch - patch applied.
Ingo
prev parent reply other threads:[~2004-11-27 2:02 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-11-23 19:29 Debugging a memory leak in the 2.6.X kernel - how-to? Valdis.Kletnieks
2004-11-23 19:51 ` William Lee Irwin III
2004-11-23 23:38 ` Andrew Morton
2004-11-25 8:42 ` 2.6.10-rc2-mm3-V0.7.31-3 memory leak (was Re: Debugging a memory leak Valdis.Kletnieks
2004-11-26 1:14 ` Ingo Molnar [this message]
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