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| author | Bart Van Assche <bart.vanassche@sandisk.com> | 2017-06-20 20:15:49 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2017-06-21 03:27:14 +0200 |
| commit | 5435c023b92ee1cfb896d924d28c6d31d8386aa0 (patch) | |
| tree | a88194a4ecc892f05f9b4b9f3a31877f7b0b805a /fs/btrfs/compression.c | |
| parent | block: Constify disk_type (diff) | |
| download | linux-5435c023b92ee1cfb896d924d28c6d31d8386aa0.tar.xz linux-5435c023b92ee1cfb896d924d28c6d31d8386aa0.zip | |
blk-mq: Warn when attempting to run a hardware queue that is not mapped
A queue must be frozen while the mapped state of a hardware queue
is changed. Additionally, any change of the mapped state is
followed by a call to blk_mq_map_swqueue() (see also
blk_mq_init_allocated_queue() and blk_mq_update_nr_hw_queues()).
Since blk_mq_map_swqueue() does not map any unmapped hardware
queue onto any software queue, no attempt will be made to run
an unmapped hardware queue. Hence issue a warning upon attempts
to run an unmapped hardware queue.
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.com>
Cc: Omar Sandoval <osandov@fb.com>
Cc: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'fs/btrfs/compression.c')
0 files changed, 0 insertions, 0 deletions