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io_uring: fix stalled deferred requests

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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>
This commit is contained in:
Pavel Begunkov 2020-07-30 18:43:48 +03:00 committed by Jens Axboe
parent b2bd1cf99f
commit dd9dfcdf5a
1 changed files with 1 additions and 0 deletions
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fs/io_uring.c
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@ -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);
/*