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| author | Pavel Begunkov <asml.silence@gmail.com> | 2020-03-14 00:31:03 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2020-03-15 02:02:26 +0300 |
| commit | d78298e73a3443a3c1766fa89f5370f52a4efd94 (patch) | |
| tree | 6b2d9b5433a7fa4fd26470cce37892b01337153b | |
| parent | 2293b4195800f88de2c454a24b25874be56d87f3 (diff) | |
| download | linux-d78298e73a3443a3c1766fa89f5370f52a4efd94.tar.xz | |
io-wq: don't resched if there is no work
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>
| -rw-r--r-- | fs/io-wq.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/fs/io-wq.c b/fs/io-wq.c index 0e7c6277afcb..8afe5565f57a 100644 --- a/fs/io-wq.c +++ b/fs/io-wq.c @@ -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; |