linux-kernel - Re: drop

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Message-ID: <20090305140708.GA23369@localhost>
Date:	Thu, 5 Mar 2009 22:07:08 +0800
From:	Wu Fengguang <fengguang.wu@...el.com>
To:	Lukas Hejtmanek <xhejtman@....muni.cz>
Cc:	Markus <M4rkusXXL@....de>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Zdenek Kabelac <zkabelac@...hat.com>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>
Subject: Re: drop_caches ...

On Thu, Mar 05, 2009 at 04:01:25PM +0200, Lukas Hejtmanek wrote:
> On Thu, Mar 05, 2009 at 09:36:03PM +0800, Wu Fengguang wrote:
> > > filesize and "cached" the amount of the file being in cache (why can 
> > > this be bigger than the file?!).
> > 
> >           size = file size in bytes
> >         cached = cached pages
> > 
> > So it's normal that (size > cached).
> 
> and one more thing. It seems that at least in the version of filecache I have,
> the size and cached are in kB rather than in B.

Ah sorry for the confusion, it is in KB: DIV_ROUND_UP(size, 1024).
It may be better to simply use bytes though.

Thanks,
Fengguang

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