Re: RFC: THE OFFLINE SCHEDULER

Christoph Lameter
2009-08-28T20:59:12Z

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.

> 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.

> 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.