Messages in this thread | | | Date | Fri, 28 Aug 2009 22:34:16 +0200 (CEST) | From | Thomas Gleixner <> | Subject | Re: RFC: THE OFFLINE SCHEDULER |
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On Fri, 28 Aug 2009, Christoph Lameter wrote:
> On Fri, 28 Aug 2009, Thomas Gleixner wrote: > > > The statistics stuff needs to be tackled anyway as we need to offload > > the sched accounting to some other cpu. > > The vm statisticcs in mm/vmstat.c are different from the sched accounting.
I know, but the problem is basically the same. Delegate the stats to someone else.
> > What slab queue stuff is running on timers and cannot be switched off > > in such a context? > > slab does run a timer every 2 second to age queues. If there was activity > then there can be a relatively long time in which we periodically throw > out portions of the cached data.
Right, but why does that affect a CPU which is marked "I'm not involved in that game" ?
> > Device specific stuff should not happen on such a CPU when there is no > > device handled on it. > > The device may periodically check for conditions that require action.
Errm. The device is associated to some other CPU, so why would it require action on an isolated one ? Or are you talking about a device which is associated to that isolated CPU ?
Thanks,
tglx
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