From: Nick Piggin <npiggin@suse.de>
To: Andrew Morton <akpm@osdl.org>
Cc: Linus Torvalds <torvalds@osdl.org>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
Linux Memory Management List <linux-mm@kvack.org>,
Greg KH <gregkh@suse.de>
Subject: Re: [patch] mm: bug in set_page_dirty_buffers
Date: Tue, 10 Oct 2006 06:11:41 +0200 [thread overview]
Message-ID: <20061010041141.GL15822@wotan.suse.de> (raw)
In-Reply-To: <20061009205030.e247482e.akpm@osdl.org>
On Mon, Oct 09, 2006 at 08:50:30PM -0700, Andrew Morton wrote:
> On Tue, 10 Oct 2006 05:34:12 +0200
> Nick Piggin <npiggin@suse.de> wrote:
>
> > the problem is that page_mapping is still free to go NULL at any
> > time, and __set_page_dirty_buffers wasn't checking for that.
> >
> > If there is another race, then it must be because the buffer code
> > cannot cope with dirty buffers against a truncated page. It is
> > kind of spaghetti, though. What stops set_page_dirty_buffers from
> > racing with block_invalidatepage, for example?
>
> Nothing that I can think of.
block_invalidatepage
discard_buffer
set_page_dirty_buffers
try_to_release_page
try_to_free_buffers
drop_buffers [fails because buffer is dirty]
Hmm...
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next prev parent reply other threads:[~2006-10-10 4:11 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-10-10 2:36 Nick Piggin
2006-10-10 3:06 ` Linus Torvalds
2006-10-10 3:19 ` Nick Piggin
2006-10-10 3:20 ` Andrew Morton
2006-10-10 3:34 ` Nick Piggin
2006-10-10 3:50 ` Andrew Morton
2006-10-10 3:58 ` Nick Piggin
2006-10-10 4:14 ` Andrew Morton
2006-10-10 4:21 ` Nick Piggin
2006-10-10 4:38 ` Andrew Morton
2006-10-10 4:47 ` Nick Piggin
2006-10-10 5:01 ` Andrew Morton
2006-10-10 5:22 ` Nick Piggin
2006-10-10 5:29 ` Andrew Morton
2006-10-10 5:48 ` Nick Piggin
2006-10-10 6:08 ` Andrew Morton
2006-10-10 6:19 ` Nick Piggin
2006-10-10 6:27 ` Andrew Morton
2006-10-10 6:39 ` Nick Piggin
2006-10-10 6:52 ` Nick Piggin
2006-10-10 7:06 ` Andrew Morton
2006-10-10 7:21 ` Nick Piggin
2006-10-10 8:07 ` Andrew Morton
2006-10-10 8:18 ` Nick Piggin
2006-10-10 8:41 ` Andrew Morton
2006-10-10 8:49 ` Nick Piggin
2006-10-10 9:07 ` Andrew Morton
2006-10-10 9:23 ` Nick Piggin
2006-10-10 6:48 ` Peter Zijlstra
2006-10-10 6:59 ` Nick Piggin
2006-10-10 7:11 ` Peter Zijlstra
2006-10-10 7:30 ` Nick Piggin
2006-10-10 4:11 ` Nick Piggin [this message]
2006-10-10 3:37 ` Andrew Morton
2006-10-10 3:42 ` Nick Piggin
2006-10-10 7:42 ` patch mm-bug-in-set_page_dirty_buffers.patch queued to -stable tree gregkh
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