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    SubjectRe: [BUG: NULL pointer dereference] cgroups and RT scheduling interact badly.
    2008/6/17 Peter Zijlstra <peterz@infradead.org>:
    > On Tue, 2008-06-17 at 14:25 +0200, Daniel K. wrote:
    >> Peter Zijlstra wrote:
    >> > How's this [patch] work for you? (includes the previuos patchlet too)
    >>
    >> Thanks,
    >>
    >> this patch fixed the obvious problem, namely
    >>
    >> # echo $$ > /dev/cgroup/burn/oops/tasks
    >> # schedtool -R -p 1 -e burnP6 &
    >>
    >> now works again. However, the last step below
    >>
    >> # echo $$ > /dev/cgroup/tasks
    >> # burnP6 &
    >> [1] 3414
    >> # echo 3414 > /dev/cgroup/burn/oops/tasks
    >> # schedtool -R -p 1 3414
    >>
    >> gives this new and shiny Oops instead.
    >
    > Whilst I'm gracious for your testing, I truly hope you're done breaking
    > my stuff ;-)
    >
    > How's this for you?

    FYI, I could reproduce a crash and this patch fixes it indeed.


    --
    Best regards,
    Dmitry Adamushko


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