Bug 11876

Summary: RCU hang on cpu re-hotplug with 2.6.27rc8
Product: Other Reporter: Rafael J. Wysocki (rjw)
Component: OtherAssignee: other_other
Severity: normal CC: andi-bz, liaoclarke
Priority: P1    
Hardware: All   
OS: Linux   
Kernel Version: 2.6.27-rc8 Subsystem:
Regression: Yes Bisected commit-id:
Bug Depends on:    
Bug Blocks: 11167    

Description Rafael J. Wysocki 2008-10-28 09:08:59 UTC
Subject    : RCU hang on cpu re-hotplug with 2.6.27rc8
Submitter  : Andi Kleen <andi@firstfloor.org>
Date       : 2008-10-06 23:28
References : http://marc.info/?l=linux-kernel&m=122333610602399&w=2
Handled-By : "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>

This entry is being used for tracking a regression from 2.6.26.  Please don't
close it until the problem is fixed in the mainline.
Comment 1 Rafael J. Wysocki 2008-12-13 10:46:15 UTC
Andi, does it still happen with the current mainline?
Comment 2 Rafael J. Wysocki 2009-01-11 05:11:36 UTC
This problem appears to have been fixed in current mainline.  Closing.
Comment 3 liaoclarke 2012-12-08 07:27:15 UTC
Rafael, I meet the same problem on 2.6.27-rc7 when testing cpu hotplug on a 4 core SMP machine,
then I go through the history of mainline, find one commit (2133b5d7)which looks like to be related to this bug, but its content is adding a debugging feature on classic RCU, not a bug fix, so do you know in which commit i could find out the solution, thanks.