linux-kernel - Re: [Bug 9182] Critical memory leak (dirty pages)

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Message-Id: <20071215203539.d6f71e96.akpm@linux-foundation.org>
Date:	Sat, 15 Dec 2007 20:35:39 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Krzysztof Oledzki <olel@....pl>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Nick Piggin <nickpiggin@...oo.com.au>,
	Peter Zijlstra <peterz@...radead.org>,
	Thomas Osterried <osterried@...se.de>, protasnb@...il.com,
	bugme-daemon@...zilla.kernel.org
Subject: Re: [Bug 9182] Critical memory leak (dirty pages)

On Sun, 16 Dec 2007 00:08:52 +0100 (CET) Krzysztof Oledzki <olel@....pl> wrote:

> 
> 
> On Sat, 15 Dec 2007, bugme-daemon@...zilla.kernel.org wrote:
> 
> > http://bugzilla.kernel.org/show_bug.cgi?id=9182
> >
> >
> > ------- Comment #33 from protasnb@...il.com  2007-12-15 14:19 -------
> > Krzysztof, I'd hate point you to a hard path (at least time consuming), but
> > you've done a lot of digging by now anyway. How about git bisecting between
> > 2.6.20-rc2 and rc1? Here is great info on bisecting:
> > http://www.kernel.org/doc/local/git-quick.html
> 
> As I'm smarter than git-bistect I can tell that 2.6.20-rc1-git8 is as bad 
> as 2.6.20-rc2 but 2.6.20-rc1-git8 with one patch reverted seems to be OK. 
> So it took me only 2 reboots. ;)
> 
> The guilty patch is the one I proposed just an hour ago:
>   http://git.kernel.org/?p=linux%2Fkernel%2Fgit%2Fstable%2Flinux-2.6.20.y.git;a=commitdiff_plain;h=fba2591bf4e418b6c3f9f8794c9dd8fe40ae7bd9
> 
> So:
>   - 2.6.20-rc1: OK
>   - 2.6.20-rc1-git8 with fba2591bf4e418b6c3f9f8794c9dd8fe40ae7bd9 reverted: OK
>   - 2.6.20-rc1-git8: very BAD
>   - 2.6.20-rc2: very BAD
>   - 2.6.20-rc4: very BAD
>   - >= 2.6.20: BAD (but not *very* BAD!)
> 

well..  We have code which has been used by *everyone* for a year and it's
misbehaving for you alone.  I wonder what you're doing that is
different/special.

Which filesystem, which mount options, what sort of workload?

Thanks.
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