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Commit 0ffbce80 authored by Jens Axboe's avatar Jens Axboe
Browse files

blk-mq: blk_mq_start_hw_queue() should use blk_mq_run_hw_queue() 



Currently it calls __blk_mq_run_hw_queue(), which depends on the
CPU placement being correct. This means it's not possible to call
blk_mq_start_hw_queues(q) from a context that is correct for all
queues, leading to triggering the

WARN_ON(!cpumask_test_cpu(raw_smp_processor_id(), hctx->cpumask));

in __blk_mq_run_hw_queue().

Reported-by: default avatarMing Lei <tom.leiming@gmail.com>
Signed-off-by: default avatarJens Axboe <axboe@fb.com>
parent 66cb45aa

block/blk-mq.c

+1 −1
Original line number Diff line number Diff line
@@ -878,7 +878,7 @@ void blk_mq_start_hw_queue(struct blk_mq_hw_ctx *hctx) 
	clear_bit(BLK_MQ_S_STOPPED, &hctx->state);



	preempt_disable();

	__blk_mq_run_hw_queue(hctx);

	blk_mq_run_hw_queue(hctx, false);

	preempt_enable();

}

EXPORT_SYMBOL(blk_mq_start_hw_queue);