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    SubjectRe: 2.6.18 ext3 panic.
    On Tue, Oct 03, 2006 at 02:40:30AM -0400, Dave Jones wrote:

    > > > > ----------- [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.

    Been chugging away for 10 hrs now without repeating that incident. Hmm.
    That patch looks like good -stable material. I'll keep digging to
    see if I can somehow reproduce the problem I saw with the patch applied,
    but in absense of something better, I think we should go with it.

    One thing that did happen in the 10hrs was fsx-over-NFS spewed some
    nasty looking trace. I'll post that separately next.

    Dave

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