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| author | Lai Jiangshan <laijs@cn.fujitsu.com> | 2012-09-10 19:03:33 +0200 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2012-09-10 19:04:54 +0200 |
| commit | 552a37e9360a293cd20e7f8ff1fb326a244c5f1e (patch) | |
| tree | 00d89d5778d4ab8320f6bf24d81e33a290f9fcb1 /net/wireless | |
| parent | workqueue: fix possible deadlock in idle worker rebinding (diff) | |
| download | linux-552a37e9360a293cd20e7f8ff1fb326a244c5f1e.tar.xz linux-552a37e9360a293cd20e7f8ff1fb326a244c5f1e.zip | |
workqueue: restore POOL_MANAGING_WORKERS
This patch restores POOL_MANAGING_WORKERS which was replaced by
pool->manager_mutex by 6037315269 "workqueue: use mutex for global_cwq
manager exclusion".
There's a subtle idle worker depletion bug across CPU hotplug events
and we need to distinguish an actual manager and CPU hotplug
preventing management. POOL_MANAGING_WORKERS will be used for the
former and manager_mutex the later.
This patch just lays POOL_MANAGING_WORKERS on top of the existing
manager_mutex and doesn't introduce any synchronization changes. The
next patch will update it.
Note that this patch fixes a non-critical anomaly where
too_many_workers() may return %true spuriously while CPU hotplug is in
progress. While the issue could schedule idle timer spuriously, it
didn't trigger any actual misbehavior.
tj: Rewrote patch description.
Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'net/wireless')
0 files changed, 0 insertions, 0 deletions