On 09/29/2016 01:59 AM, Bart Van Assche wrote:

blk_quiesce_queue() prevents that new queue_rq() invocations
occur and waits until ongoing invocations have finished. This
function does *not* wait until all outstanding requests have
finished (this means invocation of request.end_io()).
blk_resume_queue() resumes normal I/O processing.

Signed-off-by: Bart Van Assche <redacted>
Cc: Hannes Reinecke <hare@suse.com>
Cc: Johannes Thumshirn <redacted>
---
 block/blk-mq.c         | 137 ++++++++++++++++++++++++++++++++++++++++++++-----
 include/linux/blk-mq.h |   2 +
 include/linux/blkdev.h |   5 ++
 3 files changed, 131 insertions(+), 13 deletions(-)

Reviewed-by: Hannes Reinecke <hare@suse.com>

Cheers,

Hannes
-- 
Dr. Hannes Reinecke		      zSeries & Storage
hare@suse.de			      +49 911 74053 688
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