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[Xen-devel] [PATCH] Avoid race when moving cpu between cpupools
| To: | xen-devel@xxxxxxxxxxxxxxxxxxx |
|---|---|
| Subject: | [Xen-devel] [PATCH] Avoid race when moving cpu between cpupools |
| From: | Juergen Gross <juergen.gross@xxxxxxxxxxxxxx> |
| Date: | Thu, 24 Feb 2011 11:00:25 +0100 |
| Delivery-date: | Thu, 24 Feb 2011 02:04:34 -0800 |
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Moving cpus between cpupools is done under the schedule lock of the moved cpu. When checking a cpu being member of a cpupool this must be done with the lock of that cpu being held. Hot-unplugging of physical cpus might encounter the same problems, but this should happen only very rarely. Signed-off-by: juergen.gross@xxxxxxxxxxxxxx 2 files changed, 35 insertions(+), 7 deletions(-) xen/common/sched_credit.c | 3 ++- xen/common/schedule.c | 39 +++++++++++++++++++++++++++++++++------
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