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| author | Joonsoo Kim <js1304@gmail.com> | 2012-08-15 14:25:38 (GMT) |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2012-08-16 21:21:15 (GMT) |
| commit | e42986de481238204f6e0b0f4434da428895c20b (patch) | |
| tree | 613150adf76500507ca69d59d5448fa05affbc98 /mm/util.c | |
| parent | b75cac9368fa91636e17d0f7950b35d837154e14 (diff) | |
| download | linux-fsl-qoriq-e42986de481238204f6e0b0f4434da428895c20b.tar.xz | |
workqueue: change value of lcpu in __queue_delayed_work_on()
We assign cpu id into work struct's data field in __queue_delayed_work_on().
In current implementation, when work is come in first time,
current running cpu id is assigned.
If we do __queue_delayed_work_on() with CPU A on CPU B,
__queue_work() invoked in delayed_work_timer_fn() go into
the following sub-optimal path in case of WQ_NON_REENTRANT.
gcwq = get_gcwq(cpu);
if (wq->flags & WQ_NON_REENTRANT &&
(last_gcwq = get_work_gcwq(work)) && last_gcwq != gcwq) {
Change lcpu to @cpu and rechange lcpu to local cpu if lcpu is WORK_CPU_UNBOUND.
It is sufficient to prevent to go into sub-optimal path.
tj: Slightly rephrased the comment.
Signed-off-by: Joonsoo Kim <js1304@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'mm/util.c')
0 files changed, 0 insertions, 0 deletions