io_uring might be iterating over several devices/files iopoll'ing each of them, for that it passes spin=false expecting quick return if there are no requests to complete. However, blk_poll() will sleep if hybrid poll is enabled. Skip sleeping there if specified not to spin. Signed-off-by: Pavel Begunkov <asml.silence@xxxxxxxxx> --- v2: inverse invalid spin check block/blk-mq.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/block/blk-mq.c b/block/blk-mq.c index 55bcee5dc032..38262212fc99 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -3865,7 +3865,7 @@ int blk_poll(struct request_queue *q, blk_qc_t cookie, bool spin) * the IO isn't complete, we'll get called again and will go * straight to the busy poll loop. */ - if (blk_mq_poll_hybrid(q, hctx, cookie)) + if (spin && blk_mq_poll_hybrid(q, hctx, cookie)) return 1; hctx->poll_considered++; -- 2.24.0
