Messages in this thread | | | Date | Mon, 29 Sep 2008 21:02:03 -0700 | From | "Paul E. McKenney" <> | Subject | Re: [GIT pull] timer fixes for .27 |
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On Mon, Sep 29, 2008 at 08:54:12PM -0700, Paul E. McKenney wrote: > On Tue, Sep 30, 2008 at 01:41:56PM +1000, Benjamin Herrenschmidt wrote: > > On Mon, 2008-09-29 at 15:44 -0700, Paul E. McKenney wrote: > > > > Please pull the latest timers-fixes-for-linus git tree from: > > > > > > > > > > > git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip.git > > > timers-fixes-for-linus > > > > > > > > The patches fix hard to trigger bugs in the CPU offline code of > > > > hrtimers which were noticed by Paul McKenney recently. In the worst > > > > case they can leave migrated hrtimers in a stale state. > > > > > > Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> > > > Tested-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> > > > > Ah, so we found and fixed these ? > > For "we" == Thomas, yes. ;-)
One other thing -- these bugs affect x86 as well as Power. Just takes more stress for x86 to see the bugs in some cases.
Thanx, Paul
> > Linus, those bugs are actually a regression from when we didn't use the > > new timer code (which isn't that long ago). It would be nice to have the > > fixes in .27 (and thus in the various distros that will derive from it) > > but I would understand if the size of the patch made you choke that late > > in the -rc cycle... In which case we'll be in for more backports :-) > > > > Cheers, > > Ben. > > > >
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