Re: 2.6.18 ext3 panic.

[Dave Jones <davej@redhat.com>]

On Mon, Oct 02, 2006 at 11:19:45PM -0700, Andrew Morton wrote:
 > On Tue, 03 Oct 2006 00:43:01 -0500
 > Eric Sandeen <sandeen@sandeen.net> wrote:
 > 
 > > Dave Jones wrote:
 > > 
 > > > So I managed to reproduce it with an 'fsx foo' and a
 > > > 'fsstress -d . -r -n 100000 -p 20 -r'. This time I grabbed it from
 > > > a vanilla 2.6.18 with none of the Fedora patches..
 > > > 
 > > > I'll give 2.6.18-git a try next.
 > > > 
 > > > 		Dave
 > > > 
 > > > ----------- [cut here ] --------- [please bite here ] ---------
 > > > Kernel BUG at fs/buffer.c:2791
 > > 
 > > I had thought/hoped that this was fixed by Jan's patch at 
 > > http://lkml.org/lkml/2006/9/7/236 from the thread started at 
 > > http://lkml.org/lkml/2006/9/1/149, but it seems maybe not.  Dave hit this bug 
 > > first by going through that new codepath....
 > 
 > Yes, Jan's patch is supposed to fix that !buffer_mapped() assertion.  iirc,
 > Badari was hitting that BUG and was able to confirm that Jan's patch
 > (3998b9301d3d55be8373add22b6bc5e11c1d9b71 in post-2.6.18 mainline) fixed
 > it.

Ok, this afternoon I was definitly running a kernel with that patch in it,
and managed to get a trace (It was the one from the top of this thread
that unfortunatly got truncated).

Now, I can't reproduce it on a plain 2.6.18+that patch.
I'll leave the stress test running overnight, and see if anything
falls out in the morning.

	Dave

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