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io-wq: reduce acct->lock crossing functions lock/unlock

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reduce acct->lock lock and unlock in different functions to make the
code clearer.

Signed-off-by: Hao Xu <haoxu@linux.alibaba.com>
Link: https://lore.kernel.org/r/20220206095241.121485-3-haoxu@linux.alibaba.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Hao Xu 2022-02-06 17:52:40 +08:00 committed by Jens Axboe
parent 42abc95f05
commit e13fb1fe14
1 changed files with 12 additions and 20 deletions
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32
fs/io-wq.c
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@ -239,10 +239,15 @@ static void io_worker_exit(struct io_worker *worker)
static inline bool io_acct_run_queue(struct io_wqe_acct *acct)
{
bool ret = false;
raw_spin_lock(&acct->lock);
if (!wq_list_empty(&acct->work_list) &&
!test_bit(IO_ACCT_STALLED_BIT, &acct->flags))
return true;
return false;
ret = true;
raw_spin_unlock(&acct->lock);
return ret;
}
/*
@ -395,13 +400,9 @@ static void io_wqe_dec_running(struct io_worker *worker)
if (!atomic_dec_and_test(&acct->nr_running))
return;
raw_spin_lock(&wqe->lock);
if (!io_acct_run_queue(acct)) {
raw_spin_unlock(&wqe->lock);
if (!io_acct_run_queue(acct))
return;
}
raw_spin_unlock(&wqe->lock);
atomic_inc(&acct->nr_running);
atomic_inc(&wqe->wq->worker_refs);
io_queue_worker_create(worker, acct, create_worker_cb);
@ -544,7 +545,6 @@ static void io_assign_current_work(struct io_worker *worker,
static void io_wqe_enqueue(struct io_wqe *wqe, struct io_wq_work *work);
static void io_worker_handle_work(struct io_worker *worker)
__releases(acct->lock)
{
struct io_wqe_acct *acct = io_wqe_get_acct(worker);
struct io_wqe *wqe = worker->wqe;
@ -561,6 +561,7 @@ static void io_worker_handle_work(struct io_worker *worker)
* can't make progress, any work completion or insertion will
* clear the stalled flag.
*/
raw_spin_lock(&acct->lock);
work = io_get_next_work(acct, worker);
raw_spin_unlock(&acct->lock);
if (work) {
@ -614,8 +615,6 @@ static void io_worker_handle_work(struct io_worker *worker)
wake_up(&wq->hash->wait);
}
} while (work);
raw_spin_lock(&acct->lock);
} while (1);
}
@ -639,14 +638,9 @@ static int io_wqe_worker(void *data)
long ret;
set_current_state(TASK_INTERRUPTIBLE);
loop:
raw_spin_lock(&acct->lock);
if (io_acct_run_queue(acct)) {
while (io_acct_run_queue(acct))
io_worker_handle_work(worker);
goto loop;
} else {
raw_spin_unlock(&acct->lock);
}
raw_spin_lock(&wqe->lock);
/* timed out, exit unless we're the last worker */
if (last_timeout && acct->nr_workers > 1) {
@ -671,10 +665,8 @@ loop:
last_timeout = !ret;
}
if (test_bit(IO_WQ_BIT_EXIT, &wq->state)) {
raw_spin_lock(&acct->lock);
if (test_bit(IO_WQ_BIT_EXIT, &wq->state))
io_worker_handle_work(worker);
}
audit_free(current);
io_worker_exit(worker);