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| author | Lai Jiangshan <laijs@cn.fujitsu.com> | 2013-02-19 21:17:02 +0100 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2013-03-04 18:44:58 +0100 |
| commit | b31041042a8cdece67f925e4bae55b5f5fd754ca (patch) | |
| tree | 6392271c537c05d59e0d72ac72463343d2a29249 /ipc/compat.c | |
| parent | workqueue: change argument of worker_maybe_bind_and_lock() to @pool (diff) | |
| download | linux-b31041042a8cdece67f925e4bae55b5f5fd754ca.tar.xz linux-b31041042a8cdece67f925e4bae55b5f5fd754ca.zip | |
workqueue: better define synchronization rule around rescuer->pool updates
Rescuers visit different worker_pools to process work items from pools
under pressure. Currently, rescuer->pool is updated outside any
locking and when an outsider looks at a rescuer, there's no way to
tell when and whether rescuer->pool is gonna change. While this
doesn't currently cause any problem, it is nasty.
With recent worker_maybe_bind_and_lock() changes, we can move
rescuer->pool updates inside pool locks such that if rescuer->pool
equals a locked pool, it's guaranteed to stay that way until the pool
is unlocked.
Move rescuer->pool inside pool->lock.
This patch doesn't introduce any visible behavior difference.
tj: Updated the description.
Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'ipc/compat.c')
0 files changed, 0 insertions, 0 deletions