On Thu, 2015-03-26 at 06:23 +0100, Mike Galbraith wrote: > On Wed, 2015-03-25 at 20:17 -0600, Thavatchai Makphaibulchoke wrote: > > > > On 03/22/2015 10:42 PM, Mike Galbraith wrote: > > >> Why can't we just Let swapper be the owner when in irq with no dummy? > > >> > > > > Thanks Mike for the suggestion. That may also work. Unfortunately > > somehow I'm still having a hung problem, which may be related to the > > priority of the interrupt handler task. > > > > >> I have "don't raise timer unconditionally" re-applied, the check for a > > >> running callback bits of my nohz_full fixlet, and the below on top of > > >> that, and all _seems_ well. > > > > > > But not so well on 64 core box. That has nothing to do with hacklet > > > though, re-applying timers-do-not-raise-softirq-unconditionally.patch > > > without thta hangs the 64 core box during boot with no help from me > > > other than to patchlet to let nohz work at all, seems there's another > > > issue lurking there. Hohum. Without 'don't raise..", big box is fine. > > > > > > > If you get your patch to work, I could try my test that was able to > > reproduce the problem consistently. > > If you had "don't raise timer unconditionally" applied, no surprise, my > big box hangs too with or without hacklet. If didn't have it applied, > you don't need the hack. If you had both and rtmutex debugging turned > on, posted version _should_ explode, as it didn't bother to side-step > that bit (et al). Oh, and if you didn't have the below enabled, you'll certainly hang. rt-nohz_full-fix-nohz_full-for-PREEMPT_RT_FULL.patch -Mike -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
