On 09/25/2017 10:29 PM, Bart Van Assche wrote: > From: Ming Lei <[email protected]> > > This patch makes it possible to pause request allocation for > the legacy block layer by calling blk_mq_freeze_queue() and > blk_mq_unfreeze_queue(). > > Signed-off-by: Ming Lei <[email protected]> > [ bvanassche: Combined two patches into one, edited a comment and made sure > REQ_NOWAIT is handled properly in blk_old_get_request() ] > Signed-off-by: Bart Van Assche <[email protected]> > Cc: Ming Lei <[email protected]> > Cc: Christoph Hellwig <[email protected]> > Cc: Hannes Reinecke <[email protected]> > Cc: Johannes Thumshirn <[email protected]> > --- > block/blk-core.c | 12 ++++++++++++ > block/blk-mq.c | 10 ++-------- > 2 files changed, 14 insertions(+), 8 deletions(-) > I actually had a customer reoport hitting a q_usage_counter underflow, so this is a real bugfix. And I'd advocate to have it pushed independently on the overall patchset, if it should be delayed even further.
Reviewed-by: Hannes Reinecke <[email protected]> Cheers, Hannes -- Dr. Hannes Reinecke Teamlead Storage & Networking [email protected] +49 911 74053 688 SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg GF: F. Imendörffer, J. Smithard, J. Guild, D. Upmanyu, G. Norton HRB 21284 (AG Nürnberg)
