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| author | Jens Axboe <axboe@kernel.dk> | 2024-02-14 13:57:20 -0700 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2024-02-14 13:57:20 -0700 |
| commit | c8d8fc3b2d9d4c81e3d3b23eca504ad713a91219 (patch) | |
| tree | 4368511c51e0497144b4d436e3d3a5023a7d8c6e /io_uring | |
| parent | 78f9b61bd8e5466f0e90823e64e3d87c41f6258c (diff) | |
| download | linux-c8d8fc3b2d9d4c81e3d3b23eca504ad713a91219.tar.gz | |
io_uring/sqpoll: use the correct check for pending task_work
A previous commit moved to using just the private task_work list for
SQPOLL, but it neglected to update the check for whether we have
pending task_work. Normally this is fine as we'll attempt to run it
unconditionally, but if we race with going to sleep AND task_work
being added, then we certainly need the right check here.
Fixes: af5d68f8892f ("io_uring/sqpoll: manage task_work privately")
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'io_uring')
| -rw-r--r-- | io_uring/sqpoll.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/io_uring/sqpoll.c b/io_uring/sqpoll.c index f3979cacda13b3..82672eaaee8111 100644 --- a/io_uring/sqpoll.c +++ b/io_uring/sqpoll.c @@ -246,6 +246,13 @@ static unsigned int io_sq_tw(struct llist_node **retry_list, int max_entries) return count; } +static bool io_sq_tw_pending(struct llist_node *retry_list) +{ + struct io_uring_task *tctx = current->io_uring; + + return retry_list || !llist_empty(&tctx->task_list); +} + static int io_sq_thread(void *data) { struct llist_node *retry_list = NULL; @@ -301,7 +308,7 @@ static int io_sq_thread(void *data) } prepare_to_wait(&sqd->wait, &wait, TASK_INTERRUPTIBLE); - if (!io_sqd_events_pending(sqd) && !task_work_pending(current)) { + if (!io_sqd_events_pending(sqd) && !io_sq_tw_pending(retry_list)) { bool needs_sched = true; list_for_each_entry(ctx, &sqd->ctx_list, sqd_list) { |