On Mon, 2017-06-05 at 12:16 +0530, Asutosh Das (asd) wrote: > It's on 4.4 and its an Android kernel. > > No - I haven't tried it out yet. I could get some clues from the > call-stack itself, like I explained before. I can try these configs > though. While I do that, I'd like to know your thoughts on my analysis. > Do you think with the current data, it makes sense? Hello Asutosh, If your analysis is correct then I think the easiest solution will be to switch to scsi-mq. The scsi-mq .queue_rq function is called without the host lock held and hence there is no need to unlock the host lock from inside the queue_rq function. Bart.