Messages in this thread | | | Subject | Re: [PATCH 0/6] x86/cpu hotplug: Wake up offline CPU via mwait or nmi | From | Peter Zijlstra <> | Date | Tue, 05 Jun 2012 21:52:47 +0200 |
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On Tue, 2012-06-05 at 12:51 -0700, Arjan van de Ven wrote: > On 6/5/2012 12:49 PM, Peter Zijlstra wrote: > > On Tue, 2012-06-05 at 21:43 +0200, Thomas Gleixner wrote: > >> Vs. the interrupt/timer/other crap madness: > >> > >> - We really don't want to have an interrupt balancer in the kernel > >> again, but we need a mechanism to prevent the user space balancer > >> trainwreck from ruining the power saving party. > > > > What's wrong with having an interrupt balancer tied to the scheduler > > which optimistically tries to avoid interrupting nohz/isolated/idle > > cpus? > > ideally threaded interrupts are like this.. we really should push for > more usage of such and it all falls into place
They are nothing like that.. threaded interrupts still have a hardirq kick-off that's ran on whatever interrupt the interrupt routing picks.
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