From: "KOSAKI Motohiro" <m-kosaki@ceres.dti.ne.jp>
Subject: Re: [RFC] Parallelize IO for e2fsck
Date: Sat, 26 Jan 2008 21:32:32 +0900
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> > And from a performance point of view letting applications voluntarily
> > free some memory is better even than starting to swap.
>
> Absolutely.

the mem_notify patch can realize "just before starting swapping" notification :)

to be honest, I don't know fs guys requirement.
if lacking feature of fs guys needed, I implement it with presure if
you tell me it.