mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-27 12:57:53 +00:00
io_uring: don't save/restore iowait state
[ Upstream commit6f0974eccb
] This kind of state is per-syscall, and since we're doing the waiting off entering the io_uring_enter(2) syscall, there's no way that iowait can already be set for this case. Simplify it by setting it if we need to, and always clearing it to 0 when done. Fixes:7b72d661f1
("io_uring: gate iowait schedule on having pending requests") Signed-off-by: Jens Axboe <axboe@kernel.dk> Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
parent
2584d6bbc2
commit
e627c433c8
1 changed files with 2 additions and 3 deletions
|
@ -2501,7 +2501,7 @@ static bool current_pending_io(void)
|
|||
static inline int io_cqring_wait_schedule(struct io_ring_ctx *ctx,
|
||||
struct io_wait_queue *iowq)
|
||||
{
|
||||
int io_wait, ret;
|
||||
int ret;
|
||||
|
||||
if (unlikely(READ_ONCE(ctx->check_cq)))
|
||||
return 1;
|
||||
|
@ -2519,7 +2519,6 @@ static inline int io_cqring_wait_schedule(struct io_ring_ctx *ctx,
|
|||
* can take into account that the task is waiting for IO - turns out
|
||||
* to be important for low QD IO.
|
||||
*/
|
||||
io_wait = current->in_iowait;
|
||||
if (current_pending_io())
|
||||
current->in_iowait = 1;
|
||||
ret = 0;
|
||||
|
@ -2527,7 +2526,7 @@ static inline int io_cqring_wait_schedule(struct io_ring_ctx *ctx,
|
|||
schedule();
|
||||
else if (!schedule_hrtimeout(&iowq->timeout, HRTIMER_MODE_ABS))
|
||||
ret = -ETIME;
|
||||
current->in_iowait = io_wait;
|
||||
current->in_iowait = 0;
|
||||
return ret;
|
||||
}
|
||||
|
||||
|
|
Loading…
Reference in a new issue