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    SubjectRe: [Bug #15004] i915: *ERROR* Execbuf while wedged
    On Fri, 5 Feb 2010 14:09:16 -0500
    Chris Mason <chris.mason@oracle.com> wrote:

    > On Fri, Feb 05, 2010 at 11:01:00AM -0800, Jesse Barnes wrote:
    > > On Mon, 1 Feb 2010 01:43:19 +0100 (CET)
    > > "Rafael J. Wysocki" <rjw@sisk.pl> wrote:
    > >
    > > > This message has been generated automatically as a part of a
    > > > report of regressions introduced between 2.6.31 and 2.6.32.
    > > >
    > > > The following bug entry is on the current list of known
    > > > regressions introduced between 2.6.31 and 2.6.32. Please verify
    > > > if it still should be listed and let me know (either way).
    > > >
    > > >
    > > > Bug-Entry :
    > > > http://bugzilla.kernel.org/show_bug.cgi?id=15004
    > > > Subject : i915: *ERROR* Execbuf while wedged
    > > > Submitter : tomas m <tmezzadra@gmail.com>
    > > > Date : 2010-01-07 18:53 (25 days old)
    > >
    > > Can you bisect this to a particular kernel commit? The particular
    > > error message means the kernel detected a GPU hang. That's usually
    > > a userspace bug, but the kernel should recover from it.
    >
    > I see these about once a week, which would be a very difficult bisect.
    > The kernel does recover when I reboot, but beyond that the messages
    > loop forever.
    >
    > I haven't yet seen it on 2.6.33-rc, but I'm still struggling with
    > suspend/resume failures and haven't really had a one week up time yet.

    The fdo bug referenced from kernel bugzilla has a small workaround you
    might try. It forces the driver to try to recover from the hang, so
    you might not need to reboot.

    --
    Jesse Barnes, Intel Open Source Technology Center


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