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    SubjectRe: [Bug #11876] RCU hang on cpu re-hotplug with 2.6.27rc8
    On Sun, Nov 02, 2008 at 05:49:38PM +0100, Rafael J. Wysocki wrote:
    > This message has been generated automatically as a part of a report
    > of regressions introduced between 2.6.26 and 2.6.27.
    >
    > The following bug entry is on the current list of known regressions
    > introduced between 2.6.26 and 2.6.27. Please verify if it still should
    > be listed and let me know (either way).
    >
    >
    > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=11876
    > Subject : RCU hang on cpu re-hotplug with 2.6.27rc8
    > Submitter : Andi Kleen <andi@firstfloor.org>
    > Date : 2008-10-06 23:28 (28 days old)
    > References : http://marc.info/?l=linux-kernel&m=122333610602399&w=2
    > Handled-By : Paul E. McKenney <paulmck@linux.vnet.ibm.com>

    Hallo, Andi,

    Last I heard, the act of enabling CONFIG_RCU_CPU_STALL_DETECTOR
    reduced the problem from a hang to a 3-second grace period. How
    are things going with this now?

    Thanx, Paul


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