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authorMitch Luban <mluban@nvidia.com>2012-07-25 12:59:04 -0700
committerSimone Willett <swillett@nvidia.com>2012-08-13 14:49:54 -0700
commit9dfdd9ac17ac9955b431cb962df3d0492384ba0e (patch)
tree0f574137ba9f6aa72fc71f21b5ed2dce379e6863 /include/linux
parente544986d7df1e748bd5d1b12739da4ed5ab23341 (diff)
workqueue: CPU hotplug keep idle workers
This change merges two patchsets. The first set, containing 6 patches, reimplements WQ_HIGHPRI to use a seperate worker_pool. gcwq->pools[0] is used for normal priority work and pools[1] for high priority. The second patchset contains 9 patches and reimplements CPU hotplug to keep idle workers. Updates workqueue CPU hotplug path to use a disassociated global_cwq, which runs as an unbound one (WQ_UNBOUND). While this requires rebinding idle workers, overall hotplug path is much simpler. Original patchset: http://thread.gmane.org/gmane.linux.kernel/1329164 Bug 978010 Change-Id: Ic66ec8848a8d111b5278e63ef6a410846dfd8fcc Signed-off-by: Mitch Luban <mluban@nvidia.com> Reviewed-on: http://git-master/r/118387 Reviewed-by: Diwakar Tundlam <dtundlam@nvidia.com> Reviewed-by: Automatic_Commit_Validation_User Reviewed-by: Peter Boonstoppel <pboonstoppel@nvidia.com> GVS: Gerrit_Virtual_Submit Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/cpu.h5
1 files changed, 3 insertions, 2 deletions
diff --git a/include/linux/cpu.h b/include/linux/cpu.h
index 54d948ec49ab..d732be526293 100644
--- a/include/linux/cpu.h
+++ b/include/linux/cpu.h
@@ -66,8 +66,9 @@ enum {
/* migration should happen before other stuff but after perf */
CPU_PRI_PERF = 20,
CPU_PRI_MIGRATION = 10,
- /* prepare workqueues for other notifiers */
- CPU_PRI_WORKQUEUE = 5,
+ /* bring up workqueues before normal notifiers and down after */
+ CPU_PRI_WORKQUEUE_UP = 5,
+ CPU_PRI_WORKQUEUE_DOWN = -5,
};
#define CPU_ONLINE 0x0002 /* CPU (unsigned)v is up */