Observing Softlockup's while running heavy IOs

Bart Van Assche Bart.VanAssche at sandisk.com
Thu Aug 18 07:59:59 PDT 2016

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()?



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