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| author | Bart Van Assche <bvanassche@acm.org> | 2018-09-26 23:01:08 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2018-09-26 23:11:29 +0200 |
| commit | bdd6316094e0370cd183bc979dd7e322b68dc993 (patch) | |
| tree | fb7cfd6f386ca0d86bd0dc3f3ebe8341defa65f9 /usr | |
| parent | percpu-refcount: Introduce percpu_ref_resurrect() (diff) | |
| download | linux-bdd6316094e0370cd183bc979dd7e322b68dc993.tar.xz linux-bdd6316094e0370cd183bc979dd7e322b68dc993.zip | |
block: Allow unfreezing of a queue while requests are in progress
A later patch will call blk_freeze_queue_start() followed by
blk_mq_unfreeze_queue() without waiting for q_usage_counter to drop
to zero. Make sure that this doesn't cause a kernel warning to appear
by switching from percpu_ref_reinit() to percpu_ref_resurrect(). The
former namely requires that the refcount it operates on is zero.
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Jianchao Wang <jianchao.w.wang@oracle.com>
Cc: Hannes Reinecke <hare@suse.com>
Cc: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'usr')
0 files changed, 0 insertions, 0 deletions