linux-kernel - Re: [PATCH] fs, proc: Add start_data, end_data, start

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Message-ID: <20111207063308.GC20459@moon>
Date:	Wed, 7 Dec 2011 10:33:08 +0400
From:	Cyrill Gorcunov <gorcunov@...il.com>
To:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Tejun Heo <tj@...nel.org>, Andrew Vagin <avagin@...nvz.org>,
	Serge Hallyn <serge.hallyn@...onical.com>,
	Vasiliy Kulikov <segoon@...nwall.com>,
	Kees Cook <keescook@...omium.org>,
	Alexey Dobriyan <adobriyan@...il.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] fs, proc: Add start_data, end_data, start_brk members to
 /proc/$pid/stat v2

On Wed, Dec 07, 2011 at 09:02:59AM +0900, KAMEZAWA Hiroyuki wrote:
> On Wed, 7 Dec 2011 02:53:15 +0400
> Cyrill Gorcunov <gorcunov@...il.com> wrote:
>  
> > Index: linux-2.6.git/Documentation/filesystems/proc.txt
> > ===================================================================
> > --- linux-2.6.git.orig/Documentation/filesystems/proc.txt
> > +++ linux-2.6.git/Documentation/filesystems/proc.txt
> > @@ -305,6 +305,9 @@ Table 1-4: Contents of the stat files (a
> >    blkio_ticks   time spent waiting for block IO
> >    gtime         guest time of the task in jiffies
> >    cgtime        guest time of the task children in jiffies
> > +  start_data    address above which program data is placed
> > +  end_data      address above which program data is placed
> > +  start_brk     address above which program data can be expanded with brk() call
> >  ..............................................................................
> > 
> nitpick.
> 
> After reading Wikipedia, http://en.wikipedia.org/wiki/Data_segment
> 
> I prefer
> 
> start_data   address above program data+bss is placed.
> end_data     address below program data+bss is placed
> start_break  address above which program heap can be expaned with brk() call
> 
> rather than just 'data'. 
> 

No problem, I'll update (These segments are filled by binfmt handlers).

	Cyrill
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