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Revert "block: Fix a lockdep complaint triggered by request queue flushing"
This reverts commit b3c6a59975
.
Now we can avoid nvme-loop lockdep warning of 'lockdep possible recursive locking'
by nvme-loop's lock class, no need to apply dynamically allocated lock class key,
so revert commit b3c6a5997541("block: Fix a lockdep complaint triggered by request
queue flushing").
This way fixes horrible SCSI probe delay issue on megaraid_sas, and it is reported
the whole probe may take more than half an hour.
Tested-by: Kashyap Desai <kashyap.desai@broadcom.com>
Reported-by: Qian Cai <cai@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Sumit Saxena <sumit.saxena@broadcom.com>
Cc: John Garry <john.garry@huawei.com>
Cc: Kashyap Desai <kashyap.desai@broadcom.com>
Cc: Bart Van Assche <bvanassche@acm.org>
Cc: Hannes Reinecke <hare@suse.de>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
parent
88c9979334
commit
7aa390ec2d
@ -69,7 +69,6 @@
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#include <linux/blkdev.h>
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#include <linux/gfp.h>
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#include <linux/blk-mq.h>
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#include <linux/lockdep.h>
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#include "blk.h"
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#include "blk-mq.h"
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@ -469,9 +468,6 @@ struct blk_flush_queue *blk_alloc_flush_queue(int node, int cmd_size,
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INIT_LIST_HEAD(&fq->flush_queue[1]);
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INIT_LIST_HEAD(&fq->flush_data_in_flight);
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lockdep_register_key(&fq->key);
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lockdep_set_class(&fq->mq_flush_lock, &fq->key);
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return fq;
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fail_rq:
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@ -486,7 +482,6 @@ void blk_free_flush_queue(struct blk_flush_queue *fq)
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if (!fq)
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return;
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lockdep_unregister_key(&fq->key);
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kfree(fq->flush_rq);
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kfree(fq);
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}
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@ -25,7 +25,6 @@ struct blk_flush_queue {
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struct list_head flush_data_in_flight;
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struct request *flush_rq;
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struct lock_class_key key;
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spinlock_t mq_flush_lock;
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};
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