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io_uring: avoid normal tw intermediate fallback

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When a DEFER_TASKRUN io_uring is terminating it requeues deferred task
work items as normal tw, which can further fallback to kthread
execution. Avoid this extra step and always push them to the fallback
kthread.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/d1cd472cec2230c66bd1c8d412a5833f0af75384.1730772720.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Pavel Begunkov
2024-11-05 02:12:33 +00:00
committed by Jens Axboe
parent 6bf90bd8c5
commit af0a2ffef0
2 changed files with 11 additions and 12 deletions
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2
io_uring/io_uring.h
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@@ -136,7 +136,7 @@ static inline void io_lockdep_assert_cq_locked(struct io_ring_ctx *ctx)
* Not from an SQE, as those cannot be submitted, but via
* updating tagged resources.
*/
if (ctx->submitter_task->flags & PF_EXITING)
if (percpu_ref_is_dying(&ctx->refs))
lockdep_assert(current_work());
else
lockdep_assert(current == ctx->submitter_task);