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    SubjectRe: rcu_sched_state detected stall on CPU issue
    On Thu, Mar 17, 2011 at 09:18:19AM +0900, KOSAKI Motohiro wrote:
    > Hi Paul,
    >
    > > Hello!
    > >
    > > It looks like Preeti found a way to loop in kswapd with preemption
    > > disabled, please see attached dmesg. This is using 2.6.35-45.fc14.
    > >
    > > Any thoughts or recent patches that might help?
    >
    > We fixed a kswapd infinite loop issue when memory is fragmented at 2.6.38.
    > Could you please try following commits? (all are mm/vmscan.c change)
    >
    > commit dc83edd941f412e938841b4989be24aa288a1aa6
    > commit 355b09c47a0cbb73b3e65a57c03f157f2e7ddb0b
    > commit 4d40502ea580c35414a1466d86f96484910ebaec
    > commit 0abdee2bd4118366c62349a304f81537be69af33
    > commit 1741c87757448cedd03224f01586504f9256415d
    > commit 9950474883e027e6e728cbcff25f7f2bf0c96530

    Thank you, Kosaki!

    > And, your attached file and your quoted mail don't have /proc/zoneinfo
    > information. then I have no way to confirn his environment is heavy
    > fragmented or not. If possible, could you please get /proc/zoneinfo
    > info?

    Preeti, could you please send this info and try out the above patches?

    Thanx, Paul


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