From: Christoph Lameter
Date: Fri Aug 28 2009 - 16:59:20 EST

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.
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