Commit dd9dfcdf authored Jul 30, 2020 by Pavel Begunkov Committed by Jens Axboe Jul 30, 2020

io_uring: fix stalled deferred requests



Always do io_commit_cqring() after completing a request, even if it was
accounted as overflowed on the CQ side. Failing to do that may lead to
not to pushing deferred requests when needed, and so stalling the whole
ring.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

parent b2bd1cf9

fs/io_uring.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -7849,6 +7849,7 @@ static void io_uring_cancel_files(struct io_ring_ctx *ctx,
		}
		WRITE_ONCE(ctx->rings->cq_overflow,
		atomic_inc_return(&ctx->cached_cq_overflow));
		io_commit_cqring(ctx);
		spin_unlock_irq(&ctx->completion_lock);

		/*

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