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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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