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    SubjectRe: 2.6.30-rc8 Oops whilst booting
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    On Mon, 2009-06-08 at 09:21 -0700, Linus Torvalds wrote:
    >
    > On Mon, 8 Jun 2009, Chris Clayton wrote:
    > >
    > > OK. I reversed that change and built and installed the kernel. It has
    > > withstood 100 reboots without a panic. Additionally, I pulled the
    > > latest changes (that will be rc8-git5, I think) from kernel.org,
    > > reversed the change to that kernel and built and installed it. That
    > > too withstood 100 reboots without a panic.
    > >
    > > Let me know if there's anything else I can do to help fix this.
    >
    > That's already pretty convincing.
    >
    > James, Arjan? The original oops message is here (a jpg screen capture,
    > unable to open initial console):
    >
    > http://lkml.org/lkml/2009/6/6/142
    >
    > and it's this bug entry:
    >
    > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=13474
    > Subject : Oops whilst booting
    > Submitter : Chris Clayton <chris2553@googlemail.com>
    > Date : 2009-06-06 18:59 (2 days old)
    > References : http://marc.info/?l=linux-kernel&m=124431487924254&w=4
    >
    > and now bisected down to
    >
    > >> commit d5a877e8dd409d8c702986d06485c374b705d340
    > >> Author: James Bottomley <James.Bottomley@HansenPartnership.com>
    > >> Date: Sun May 24 13:03:43 2009 -0700
    > >>
    > >> async: make sure independent async domains can't accidentally entangle
    >
    > please advice. Otherwise I'll have to revert.

    The root cause is a reordering of the devices caused by the async code.

    I suspect it's a bug in async that was obscured by the old behaviour of
    async_synchronize.. (or it's a bug in the new code) ... how long do I
    have to find out which?

    James




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