From: Dylan Yudaken Date: Tue, 30 Aug 2022 12:50:09 +0000 (-0700) Subject: io_uring: do not run task work at the start of io_uring_enter X-Git-Tag: v6.1-rc5~284^2~52 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=2327337b881d3f24949da4a4d34a6e657a71a79d;p=platform%2Fkernel%2Flinux-starfive.git io_uring: do not run task work at the start of io_uring_enter This is not needed, and it is normally better to wait for task work until after submissions. This will allow greater batching if either work arrives in the meanwhile, or if the submissions cause task work to be queued up. For SQPOLL this also no longer runs task work, but this is handled inside the SQPOLL loop anyway. For IOPOLL io_iopoll_check will run task work anyway And otherwise io_cqring_wait will run task work Suggested-by: Pavel Begunkov Signed-off-by: Dylan Yudaken Link: https://lore.kernel.org/r/20220830125013.570060-4-dylany@fb.com Signed-off-by: Jens Axboe --- diff --git a/io_uring/io_uring.c b/io_uring/io_uring.c index 471472f..edf7381 100644 --- a/io_uring/io_uring.c +++ b/io_uring/io_uring.c @@ -2991,8 +2991,6 @@ SYSCALL_DEFINE6(io_uring_enter, unsigned int, fd, u32, to_submit, struct fd f; long ret; - io_run_task_work(); - if (unlikely(flags & ~(IORING_ENTER_GETEVENTS | IORING_ENTER_SQ_WAKEUP | IORING_ENTER_SQ_WAIT | IORING_ENTER_EXT_ARG | IORING_ENTER_REGISTERED_RING)))