linux-kernel - Re: [BUGFIX][PATCH] fix wrong VM_BUG_ON() in try

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Message-ID: <20101103051647.GK3769@balbir.in.ibm.com>
Date:	Wed, 3 Nov 2010 10:46:47 +0530
From:	Balbir Singh <balbir@...ux.vnet.ibm.com>
To:	Hiroyuki Kamezawa <kamezawa.hiroyuki@...il.com>
Cc:	linux-mm@...ck.org,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	nishimura@....nes.nec.co.jp,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, kosaki.motohiro@...fujitsu.com,
	hughd@...il.com
Subject: Re: [BUGFIX][PATCH] fix wrong VM_BUG_ON() in try_charge()'s
 mm->owner check

* Hiroyuki Kamezawa <kamezawa.hiroyuki@...il.com> [2010-11-03 00:10:50]:

> I'm sorry for attached file, I have to use unusual mailer this time.
> This is a fix for wrong VM_BUG_ON() for mm/memcontol.c
>

Yes, that seems reasonable. If we race with try_to_unuse() and
the mm has no new owner we set mm->owner to NULL, in those cases it
makes no sense to charge.


Reviewed-by: Balbir Singh <balbir@...ux.vnet.ibm.com>
 

-- 
	Three Cheers,
	Balbir
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