linux-kernel - Re: [BUGFIX][PATCH] fix sync_mm_rss in nommu (Was Re: sync_mm

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Date:	Tue, 09 Mar 2010 12:49:18 +0100
From:	Michal Simek <michal.simek@...alogix.com>
To:	Mike Frysinger <vapier.adi@...il.com>
CC:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	David Howells <dhowells@...hat.com>, torvalds@...l.org,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [BUGFIX][PATCH] fix sync_mm_rss in nommu (Was Re: sync_mm_rss()
 issues

Mike Frysinger wrote:
> On Mon, Mar 8, 2010 at 19:58, KAMEZAWA Hiroyuki wrote:
>> David-san, could you check this ?
>> ==
>> From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
>>
>> Fix breakage in NOMMU build
>>
>> commit 34e55232e59f7b19050267a05ff1226e5cd122a5 added sync_mm_rss()
>> for syncing loosely accounted rss counters. It's for CONFIG_MMU but
>> sync_mm_rss is called even in NOMMU enviroment (kerne/exit.c, fs/exec.c).
>> Above commit doesn't handle it well.
>>
>> This patch changes
>>  SPLIT_RSS_COUNTING depends on SPLIT_PTLOCKS && CONFIG_MMU
>>
>> And for avoid unnecessary function calls, sync_mm_rss changed to be inlined
>> noop function in header file.
> 
> fixes Blackfin systems ...
> 
> Signed-off-by: Mike Frysinger <vapier@...too.org>


fixes Microblaze noMMU systems too.

Signed-off-by: Michal Simek <monstr@...str.eu>

You can check Microblaze noMMU system via my site
http://www.monstr.eu/wiki/doku.php?id=log:log

Will be good to add your patches to linux-next before Linus tree.

Michal


> -mike
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-- 
Michal Simek, Ing. (M.Eng)
PetaLogix - Linux Solutions for a Reconfigurable World
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