tree 51dab8f9b809479b038e2d957e74fba7e1e99e49
parent ac71d12c990526b01ef6cfe50907ef8530a30331
author Andi Kleen <ak@suse.de> 1147094251 +0200
committer Linus Torvalds <torvalds@g5.osdl.org> 1147106096 -0700

[PATCH] x86_64: Move ondemand timer into own work queue

Taking the cpu hotplug semaphore in a normal events workqueue
is unsafe because other tasks can wait for any workqueues with
it hold. This results in a deadlock.

Move the DBS timer into its own work queue which is not
affected by other work queue flushes to avoid this.

Has been acked by Venkatesh.

Cc: venkatesh.pallipadi@intel.com
Cc: cpufreq@lists.linux.org.uk
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>