Message-ID: <4186E62E.9000609@us.ibm.com>
Date: Mon, 01 Nov 2004 17:43:10 -0800
From: Dave Hansen <haveblue@us.ibm.com>
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To: Brent Casavant <bcasavan@sgi.com>
CC: linux-kernel@vger.kernel.org, linux-mm@kvack.org, hugh@veritas.com,
       ak@suse.de
Subject: Re: [PATCH] Use MPOL_INTERLEAVE for tmpfs files
References: <Pine.SGI.4.58.0411011901540.77038@kzerza.americas.sgi.com>
In-Reply-To: <Pine.SGI.4.58.0411011901540.77038@kzerza.americas.sgi.com>
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Brent Casavant wrote:
> This patch causes memory allocation for tmpfs files to be distributed
> evenly across NUMA machines.  In most circumstances today, tmpfs files
> will be allocated on the same node as the task writing to the file.
> In many cases, particularly when large files are created, or a large
> number of files are created by a single task, this leads to a severe
> imbalance in free memory amongst nodes.  This patch corrects that
> situation.

Why don't you just use the NUMA API in your application for this?  Won't 
this hurt any application that uses tmpfs and never leaves a node in its 
lifetime, like a short gcc run?
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