On Tue, Dec 13 2016, Jinpu Wang wrote: > On Mon, Dec 12, 2016 at 1:59 AM, NeilBrown <neilb@xxxxxxxx> wrote: >> On Sat, Nov 26 2016, Jinpu Wang wrote: >>> [ 810.270860] [<ffffffff813fc851>] blk_prologue_bio+0x91/0xc0 >> >> What is this? I cannot find that function in the upstream kernel. >> >> NeilBrown > > Hi Neil, > > blk_prologue_bio is our internal extension to gather some stats, sorry > not informed before. Ahhh. .... > + return q->custom_make_request_fn(q, clone); I haven't heard of custom_make_request_fn before either. > +} > > ＩＭＨＯ， it seems unrelated, but I will rerun my test without this change. Yes, please re-test with an unmodified upstream kernel (and always report *exactly* what kernel you are running. I cannot analyse code that I cannot see). NeilBrown
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