Re: [PATCH 4/5] add isolate pages vmstat

[Christoph Lameter]

On Thu, 9 Jul 2009, KOSAKI Motohiro wrote:

> Subject: [PATCH] add isolate pages vmstat
>
> If the system have plenty threads or processes, concurrent reclaim can
> isolate very much pages.
> Unfortunately, current /proc/meminfo and OOM log can't show it.

"
If the system is running a heavy load of processes then concurrent reclaim
can isolate a large numbe of pages from the LRU. /proc/meminfo and the
output generated for an OOM do not show how many pages were isolated.
"

> This patch provide the way of showing this information.

"
This patch shows the information about isolated pages.
"


Page migration can also isolate a large number of pages from the LRU. But
the new counters are not used there.

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