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io-wq: don't resched if there is no work

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This little tweak restores the behaviour that was before the recent
io_worker_handle_work() optimisation patches. It makes the function do
cond_resched() and flush_signals() only if there is an actual work to
execute.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Pavel Begunkov 2020-03-14 00:31:03 +03:00 committed by Jens Axboe
parent 2293b41958
commit d78298e73a
1 changed files with 6 additions and 4 deletions
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10
fs/io-wq.c
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@ -458,10 +458,12 @@ static void io_impersonate_work(struct io_worker *worker,
static void io_assign_current_work(struct io_worker *worker,
struct io_wq_work *work)
{
/* flush pending signals before assigning new work */
if (signal_pending(current))
flush_signals(current);
cond_resched();
if (work) {
/* flush pending signals before assigning new work */
if (signal_pending(current))
flush_signals(current);
cond_resched();
}
spin_lock_irq(&worker->lock);
worker->cur_work = work;