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    SubjectRe: WARNING: at mm/slub.c:3357, kernel BUG at mm/slub.c:3413
    On 2011.12.05 at 14:11 -0500, Jerome Glisse wrote:
    > On Mon, Dec 05, 2011 at 07:15:49PM +0100, Markus Trippelsdorf 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
    >
    > Can you do a kick run on the modified patch ?

    This one is also OK after ~60 iterations.

    --
    Markus


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