On 08/17/16 22:55, Sreekanth Reddy wrote: > Observing softlockups while running heavy IOs on 8 SSD drives > connected behind our LSI SAS 3004 HBA. Hello Sreekanth, This means that more than 23s was spent before the scheduler was invoked, probably due to a loop. Can you give the attached (untested) patch a try to see whether it is the loop in __blk_mq_run_hw_queue()? Thanks, Bart. -------------- next part -------------- A non-text attachment was scrubbed... Name: 0001-block-Measure-__blk_mq_run_hw_queue-execution-time.patch Type: text/x-patch Size: 1132 bytes Desc: 0001-block-Measure-__blk_mq_run_hw_queue-execution-time.patch URL: <http://lists.infradead.org/pipermail/irqbalance/attachments/20160818/2a0ee0c3/attachment.bin>
