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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: Ming Lei <tom.leiming@gmail.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Jens Axboe 2014-06-25 08:22:34 -06:00
parent 66cb45aa41
commit 0ffbce80c2
1 changed files with 1 additions and 1 deletions
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2
block/blk-mq.c
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@ -878,7 +878,7 @@ void blk_mq_start_hw_queue(struct blk_mq_hw_ctx *hctx)
clear_bit(BLK_MQ_S_STOPPED, &hctx->state); clear_bit(BLK_MQ_S_STOPPED, &hctx->state);
preempt_disable(); preempt_disable();
__blk_mq_run_hw_queue(hctx); blk_mq_run_hw_queue(hctx, false);
preempt_enable(); preempt_enable();
} }
EXPORT_SYMBOL(blk_mq_start_hw_queue); EXPORT_SYMBOL(blk_mq_start_hw_queue);