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| author | Jens Axboe <axboe@kernel.dk> | 2023-08-09 12:58:59 -0600 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2023-08-11 10:36:12 -0600 |
| commit | 78848b9b05623cfddb790d23b0dc38a275eb0763 (patch) | |
| tree | 6098c9b1068cc1ac8545c2a822da90ab1d5f50eb /io_uring/io-wq.c | |
| parent | 89226307b109f828566f0e024ee97b722167927c (diff) | |
| download | linux-78848b9b05623cfddb790d23b0dc38a275eb0763.tar.gz linux-78848b9b05623cfddb790d23b0dc38a275eb0763.tar.bz2 linux-78848b9b05623cfddb790d23b0dc38a275eb0763.zip | |
io_uring/io-wq: don't grab wq->lock for worker activation
The worker free list is RCU protected, and checks for workers going away
when iterating it. There's no need to hold the wq->lock around the
lookup.
Reviewed-by: Hao Xu <howeyxu@tencent.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'io_uring/io-wq.c')
| -rw-r--r-- | io_uring/io-wq.c | 3 |
1 files changed, 0 insertions, 3 deletions
diff --git a/io_uring/io-wq.c b/io_uring/io-wq.c index 399e9a15c38d..3e7025b9e0dd 100644 --- a/io_uring/io-wq.c +++ b/io_uring/io-wq.c @@ -909,13 +909,10 @@ void io_wq_enqueue(struct io_wq *wq, struct io_wq_work *work) clear_bit(IO_ACCT_STALLED_BIT, &acct->flags); raw_spin_unlock(&acct->lock); - raw_spin_lock(&wq->lock); rcu_read_lock(); do_create = !io_wq_activate_free_worker(wq, acct); rcu_read_unlock(); - raw_spin_unlock(&wq->lock); - if (do_create && ((work_flags & IO_WQ_WORK_CONCURRENT) || !atomic_read(&acct->nr_running))) { bool did_create; |