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    SubjectRe: 2.6.19-rc6 : Spontaneous reboots, stack overflows - seems to implicate xfs, scsi, networking, SMP
    On Wed, 22 Nov 2006 13:58:11 +0100
    "Jesper Juhl" <jesper.juhl@gmail.com> wrote:

    > On 22/11/06, Jesper Juhl <jesper.juhl@gmail.com> wrote:
    > > On 22/11/06, David Chinner <dgc@sgi.com> wrote:
    > > > On Tue, Nov 21, 2006 at 11:02:23PM +0100, Jesper Juhl wrote:
    > > > > On 21/11/06, David Chatterton <chatz@melbourne.sgi.com> wrote:
    > ...
    > > > > >Thanks for traces, I've captured this information.
    > > > > >
    > > > > You are welcome. If you want/need more traces then I've got ~2.1G
    > > > > worth of traces that you can have :)
    > > >
    > > > Well, we don't need that many, but it would be nice to have a
    > > > set of unique traces that lead to overflows - could you process
    > > > them in some way just to extract just the unique XFS traces that
    > > > occur?
    > > >
    > > I'll try to extract a copy of each unique trace that involves xfs,
    > > sometime tomorrow or the day after, and then send you the result.
    > >
    >
    > Attached are two files. The one named stack_overflows.txt.gz contains
    > one instance of each unique stack overflow + trace that I've got. The
    > other file named kernel_BUG.txt.gz contains a few BUG() messages that
    > were also in the logs.
    >

    You have a kind of worst case scenario there:
    XFS + Block layer
    TCP receive/transmit
    VLAN

    It is hard to know who to blame, there is no information about stack
    level at each call. Since it doesn't show up for filesystems other than
    XFS, I would pick on that. Perhaps the following:


    --- 2.6.19-rc6.orig/arch/i386/Kconfig.debug 2006-11-22 11:59:32.000000000 -0800
    +++ 2.6.19-rc6/arch/i386/Kconfig.debug 2006-11-22 12:00:28.000000000 -0800
    @@ -58,7 +58,7 @@

    config 4KSTACKS
    bool "Use 4Kb for kernel stacks instead of 8Kb"
    - depends on DEBUG_KERNEL
    + depends on DEBUG_KERNEL && !XFS_FS
    help
    If you say Y here the kernel will use a 4Kb stacksize for the
    kernel stack attached to each process/thread. This facilitates
    -
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