Re: [PATCH v2 3/6] KVM-GST: KVM Steal time accounting

From: Rik van Riel
Date: Fri Jan 28 2011 - 20:54:12 EST


On 01/28/2011 02:52 PM, Glauber Costa wrote:
This patch accounts steal time time in kernel/sched.
I kept it from last proposal, because I still see advantages
in it: Doing it here will give us easier access from scheduler
variables such as the cpu rq. The next patch shows an example of
usage for it.

Since functions like account_idle_time() can be called from
multiple places, not only account_process_tick(), steal time
grabbing is repeated in each account function separatedely.

Signed-off-by: Glauber Costa<glommer@xxxxxxxxxx>
CC: Rik van Riel<riel@xxxxxxxxxx>
CC: Jeremy Fitzhardinge<jeremy.fitzhardinge@xxxxxxxxxx>
CC: Peter Zijlstra<peterz@xxxxxxxxxxxxx>
CC: Avi Kivity<avi@xxxxxxxxxx>

Not the traditional way of doing steal time, but a lot cleaner
than the legacy code that's left over from when each clocksource
had its own interrupt function.

I like it.

Acked-by: Rik van Riel <riel@xxxxxxxxxx>

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