On 01/24/2017 08:54 AM, Hannes Reinecke wrote: > Hi Jens, > > I'm trying to debug a queue stall with your blk-mq-sched branch; with my > latest mpt3sas patches fio stops basically directly after starting a > sequential read :-( > > I've debugged things and came up with the attached patch; we need to > restart waiters with blk_mq_tag_idle() after completing a tag. > We're already calling blk_mq_tag_busy() when fetching a tag, so I think > calling blk_mq_tag_idle() is required when retiring a tag. I'll take a look at this. It sounds like all your grief is related to shared tag maps, which I don't have anything that uses here. I'll see if we are leaking it, you should be able to check that by reading the 'active' file in the sysfs directory. -- Jens Axboe -- To unsubscribe from this list: send the line "unsubscribe linux-block" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
