On Tue, 2013-06-11 at 12:35 -0700, gregkh@xxxxxxxxxxxxxxxxxxx wrote: > This is a note to let you know that I've just added the patch titled > > xen/smp: Fixup NOHZ per cpu data when onlining an offline CPU. > > to the 3.9-stable tree which can be found at: > http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary > > The filename of the patch is: > xen-smp-fixup-nohz-per-cpu-data-when-onlining-an-offline-cpu.patch > and it can be found in the queue-3.9 subdirectory. > > If you, or anyone else, feels it should not be added to the stable tree, > please let <stable@xxxxxxxxxxxxxxx> know about it. [...] > That was OK (albeit the API for play_dead assumes that the CPU > stays dead and never returns) but with commit 4b0c0f294 > (tick: Cleanup NOHZ per cpu data on cpu down) that is no longer safe > as said commit resets the ts->inidle which at the start of the > cpu_idle loop was set. [...] This also needs to be applied to earlier branches, because commit 4b0c0f294 was applied to all of them: 2.6.32: d31e3b9 tick: Cleanup NOHZ per cpu data on cpu down 3.0: b9cbfd2 tick: Cleanup NOHZ per cpu data on cpu down 3.2: d9202d6 tick: Cleanup NOHZ per cpu data on cpu down 3.4: 33b7cfc tick: Cleanup NOHZ per cpu data on cpu down 3.9: c25c0eb tick: Cleanup NOHZ per cpu data on cpu down Ben. -- Ben Hutchings If the facts do not conform to your theory, they must be disposed of.
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