Created attachment 95181 [details] BAD: 3.14-rc5 and VM_PFNMAP (In reply to comment #8) > > 2) If you're familiar with oprofile, it would be very helpful to see a > profile of a "good" and a "bad" run, including kernel symbols. > Not very familiar but to give it a try :). This is 3.14-rc5 proper kernel with pfnmap which is bad case here and then oprofiled with pfnmap changed to mixedmap which is good one :).