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    SubjectRe: WARNING: at mm/slub.c:3357, kernel BUG at mm/slub.c:3413
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    On Mon, Dec 5, 2011 at 1:15 PM, Markus Trippelsdorf
    <markus@trippelsdorf.de> wrote:
    > On 2011.12.05 at 12:10 -0500, Jerome Glisse wrote:
    >> On Sun, Dec 04, 2011 at 02:02:00AM +0100, Markus Trippelsdorf wrote:
    >> > On 2011.12.03 at 14:31 -0500, Jerome Glisse wrote:
    >> > > On Sat, Dec 3, 2011 at 7:29 AM, Markus Trippelsdorf
    >> > > <markus@trippelsdorf.de> wrote:
    >> > > > On 2011.12.03 at 12:20 +0000, Dave Airlie wrote:
    >> > > >> >> > > > > FIX idr_layer_cache: Marking all objects used
    >> > > >> >> > > >
    >> > > >> >> > > > Yesterday I couldn't reproduce the issue at all. But today I've hit
    >> > > >> >> > > > exactly the same spot again. (CCing the drm list)
    >> > > >>
    >> > > >> If I had to guess it looks like 0 is getting written back to some
    >> > > >> random page by the GPU maybe, it could be that the GPU is in some half
    >> > > >> setup state at boot or on a reboot does it happen from a cold boot or
    >> > > >> just warm boot or kexec?
    >> > > >
    >> > > > Only happened with kexec thus far. Cold boot seems to be fine.
    >> > > >
    >> > >
    >> > > Can you add radeon.no_wb=1 to your kexec kernel paramater an see if
    >> > > you can reproduce.
    >> >
    >> > No, I cannot reproduce the issue with radeon.no_wb=1. (I write this
    >> > after 700 successful kexec iterations...)
    >> >
    >>
    >> Can you try if attached patch fix the issue when you don't pass the
    >> radeon.no_wb=1 option ?
    >
    > Yes the patch finally fixes the issue for me (tested with 120 kexec
    > iterations).
    > Thanks Jerome!
    >
    > --
    > Markus

    Will respin with some minor code changes.

    Cheers,
    Jerome


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