Message-ID: <4724FC38.30909@linux.vnet.ibm.com>
Date: Mon, 29 Oct 2007 02:46:40 +0530
From: Balbir Singh <balbir@linux.vnet.ibm.com>
Reply-To: balbir@linux.vnet.ibm.com
Organization: IBM
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To: Andrew Morton <akpm@linux-foundation.org>
CC: Marcelo Tosatti <marcelo@kvack.org>, linux-kernel@vger.kernel.org,
       drepper@redhat.com, riel@redhat.com, Martin Bligh <mbligh@mbligh.org>,
       linux-mm@kvack.org
Subject: Re: OOM notifications
References: <20071018201531.GA5938@dmt> <20071026140201.ae52757c.akpm@linux-foundation.org>
In-Reply-To: <20071026140201.ae52757c.akpm@linux-foundation.org>
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Andrew Morton wrote:
> It get more complicated with NUMA memory nodes and cgroup memory
> controllers.
> 

At OLS this year, users wanted user space notification of OOM
for cgroup memory controller. When a group is about to OOM,
a notification can help an external application re-adjust
memory limits across the system.

Keeping some memory reserved for handling OOM, this scheme could
be extended to handle global OOM conditions as well.

-- 
	Warm Regards,
	Balbir Singh
	Linux Technology Center
	IBM, ISTL
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