On 1/9/18 8:29 AM, Jens Axboe wrote: > On Tue, Jan 09 2018, Ming Lei wrote: >> HW queues may be unmapped in some cases, such as blk_mq_update_nr_hw_queues(), >> then we need to check it before calling blk_mq_tag_idle(), otherwise >> the following kernel oops can be triggered, so fix it by checking if >> the hw queue is unmapped since it doesn't make sense to idle the tags >> any more after hw queues are unmapped. > > Seems cleaner to just move the mapped check to the idling function, > especially since we already have the same check in the other spot where > we call the idling. Ho hum, I guess that requires shuffling some code/includes to actually do that. I'll just apply yours as-is. -- Jens Axboe
