(6/5/12 3:52 AM), Pekka Enberg wrote:
On Mon, Jun 4, 2012 at 11:05 PM, KOSAKI Motohiro
<kosaki.motohiro@xxxxxxxxx> wrote:
- On desktops, apps can drop their caches on demand if they want to
and can avoid swap activity?
In this case, fallocate(VOLATILE) is work more better.
For some cases, yes, but probably not for all.
For example, if userspace doesn't know about "about to swap real soon"
condition, it can continue to grow its caches making
fallocate(VOLATILE) pretty much useless.
Fair enough. But, Please consider your scenario don't need vmevent(2),
cat /proc/meminfo works enough. Only dropping activity need a quick work
and just in time notification. cache growing limitation don't need.
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