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| author | Joonsoo Kim <js1304@gmail.com> | 2012-08-15 23:25:39 +0900 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2012-08-16 14:21:15 -0700 |
| commit | 1aabe902ca3638d862bf0dad5a697d3a8e046b0a (patch) | |
| tree | 9cd5e0db2c42e83de8dfadb38e22b57d8bd24c4b /kernel/workqueue.c | |
| parent | e42986de481238204f6e0b0f4434da428895c20b (diff) | |
| download | lwn-1aabe902ca3638d862bf0dad5a697d3a8e046b0a.tar.gz lwn-1aabe902ca3638d862bf0dad5a697d3a8e046b0a.zip | |
workqueue: introduce system_highpri_wq
Commit 3270476a6c0ce322354df8679652f060d66526dc ('workqueue: reimplement
WQ_HIGHPRI using a separate worker_pool') introduce separate worker pool
for HIGHPRI. When we handle busyworkers for gcwq, it can be normal worker
or highpri worker. But, we don't consider this difference in rebind_workers(),
we use just system_wq for highpri worker. It makes mismatch between
cwq->pool and worker->pool.
It doesn't make error in current implementation, but possible in the future.
Now, we introduce system_highpri_wq to use proper cwq for highpri workers
in rebind_workers(). Following patch fix this issue properly.
tj: Even apart from rebinding, having system_highpri_wq generally
makes sense.
Signed-off-by: Joonsoo Kim <js1304@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'kernel/workqueue.c')
| -rw-r--r-- | kernel/workqueue.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/kernel/workqueue.c b/kernel/workqueue.c index 99ee9b939264..329c404b68c2 100644 --- a/kernel/workqueue.c +++ b/kernel/workqueue.c @@ -269,12 +269,14 @@ struct workqueue_struct { }; struct workqueue_struct *system_wq __read_mostly; +struct workqueue_struct *system_highpri_wq __read_mostly; struct workqueue_struct *system_long_wq __read_mostly; struct workqueue_struct *system_nrt_wq __read_mostly; struct workqueue_struct *system_unbound_wq __read_mostly; struct workqueue_struct *system_freezable_wq __read_mostly; struct workqueue_struct *system_nrt_freezable_wq __read_mostly; EXPORT_SYMBOL_GPL(system_wq); +EXPORT_SYMBOL_GPL(system_highpri_wq); EXPORT_SYMBOL_GPL(system_long_wq); EXPORT_SYMBOL_GPL(system_nrt_wq); EXPORT_SYMBOL_GPL(system_unbound_wq); @@ -3928,6 +3930,7 @@ static int __init init_workqueues(void) } system_wq = alloc_workqueue("events", 0, 0); + system_highpri_wq = alloc_workqueue("events_highpri", WQ_HIGHPRI, 0); system_long_wq = alloc_workqueue("events_long", 0, 0); system_nrt_wq = alloc_workqueue("events_nrt", WQ_NON_REENTRANT, 0); system_unbound_wq = alloc_workqueue("events_unbound", WQ_UNBOUND, @@ -3936,9 +3939,9 @@ static int __init init_workqueues(void) WQ_FREEZABLE, 0); system_nrt_freezable_wq = alloc_workqueue("events_nrt_freezable", WQ_NON_REENTRANT | WQ_FREEZABLE, 0); - BUG_ON(!system_wq || !system_long_wq || !system_nrt_wq || - !system_unbound_wq || !system_freezable_wq || - !system_nrt_freezable_wq); + BUG_ON(!system_wq || !system_highpri_wq || !system_long_wq || + !system_nrt_wq || !system_unbound_wq || !system_freezable_wq || + !system_nrt_freezable_wq); return 0; } early_initcall(init_workqueues); |