linux-kernel - Re: [PATCH, RESEND2] getrusage: fill ru

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Date:	Wed, 17 Dec 2008 12:42:56 +0100
From:	Jiri Pirko <jpirko@...hat.com>
To:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
Cc:	kosaki.motohiro@...fujitsu.com, linux-kernel@...r.kernel.org,
	"Oleg Nesterov" <oleg@...hat.com>,
	"Andrew Morton" <akpm@...ux-foundation.org>,
	"Michael Kerrisk" <mtk.manpages@...glemail.com>,
	linux-api@...r.kernel.org, Hugh Dickins <hugh@...itas.com>,
	jlim@....com
Subject: Re: [PATCH, RESEND2] getrusage: fill ru_maxrss value

On Wed, 17 Dec 2008 19:48:44 +0900 (JST)
KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com> wrote:

> > (updated)
> > 
> > This patch makes ->ru_maxrss value in struct rusage filled accordingly to
> > rss hiwater mark. This struct is filled as a parameter to
> > getrusage syscall. ->ru_maxrss value is set to pages which might be correct
> > as "time" application converts it to KBs.
> 
> Why?
> if kernel convert to KB, glibc don't need any change.
Where exactly glibc is working with this as KBs? I can't find that place.

I looked into sources of time util and maxrss is showed this way:
fprintf (fp, "%lu", ptok ((UL) resp->ru.ru_maxrss));
ptok() actually does pages_to_KB conversion. If we convert to KB in
kernel, this code must be changed.
> 
> 
> 
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