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SubjectRe: [PATCH 3/4] vmstat: add anon_scan_ratio field to zoneinfo
* KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> [2009-12-28 16:48:51]:

> Vmscan folks was asked "why does my system makes so much swap-out?"
> in lkml at several times.
> At that time, I made the debug patch to show recent_anon_{scanned/rorated}
> parameter at least three times.
>
> Thus, its parameter should be showed on /proc/zoneinfo. It help
> vmscan folks debugging.
>

Hmmm.. I think this should come under DEBUG_VM, a lot of tools use
/proc/zoneinfo, the additional overhead may be high.. no? Also,
I would recommend adding the additional details to the end, so
as to not break existing tools (specifically dump line # based
tools).

--
Balbir


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