From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754478Ab0CQOnX (ORCPT ); Wed, 17 Mar 2010 10:43:23 -0400 Received: from g6t0184.atlanta.hp.com ([15.193.32.61]:47763 "EHLO g6t0184.atlanta.hp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754279Ab0CQOnV (ORCPT ); Wed, 17 Mar 2010 10:43:21 -0400 Subject: Re: [PATCH 5/5] doc: add the documentation for mpol=local From: Lee Schermerhorn To: KOSAKI Motohiro Cc: LKML , kiran@scalex86.org, cl@linux-foundation.org, hugh.dickins@tiscali.co.uk, mel@csn.ul.ie, stable@kernel.org, linux-mm , akpm@linux-foundation.org In-Reply-To: <20100316145220.4C54.A69D9226@jp.fujitsu.com> References: <201003122353.o2CNrC56015250@imap1.linux-foundation.org> <20100316143406.4C45.A69D9226@jp.fujitsu.com> <20100316145220.4C54.A69D9226@jp.fujitsu.com> Content-Type: text/plain Organization: HP/LKTT Date: Wed, 17 Mar 2010 10:42:36 -0400 Message-Id: <1268836956.4773.58.camel@useless.americas.hpqcorp.net> Mime-Version: 1.0 X-Mailer: Evolution 2.26.1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 2010-03-16 at 14:53 +0900, KOSAKI Motohiro wrote: > commit 3f226aa1c (mempolicy: support mpol=local tmpfs mount option) > added new mpol=local mount option. but it didn't add a documentation. > > This patch does it. > > Signed-off-by: KOSAKI Motohiro > Cc: Ravikiran Thirumalai > Cc: Christoph Lameter > Cc: Mel Gorman > Cc: Lee Schermerhorn > Cc: Hugh Dickins > Cc: Acked-by: Lee Schermerhorn [Note: looking at this patch in context, it appears that a few more updates are in order. E.g., "contextualization" of the specified nodelists based on mems_allowed when one allocates a tmpfs file and what happens when the mount option nodelist is disjoint from a task's mems_allowed. I'll test the behavior to make sure it matches my expectations and update the doc accordingly in a subsequent patch.] > --- > Documentation/filesystems/tmpfs.txt | 6 +++++- > 1 files changed, 5 insertions(+), 1 deletions(-) > > diff --git a/Documentation/filesystems/tmpfs.txt b/Documentation/filesystems/tmpfs.txt > index 3015da0..fe09a2c 100644 > --- a/Documentation/filesystems/tmpfs.txt > +++ b/Documentation/filesystems/tmpfs.txt > @@ -82,11 +82,13 @@ tmpfs has a mount option to set the NUMA memory allocation policy for > all files in that instance (if CONFIG_NUMA is enabled) - which can be > adjusted on the fly via 'mount -o remount ...' > > -mpol=default prefers to allocate memory from the local node > +mpol=default use the process allocation policy > + (see set_mempolicy(2)) > mpol=prefer:Node prefers to allocate memory from the given Node > mpol=bind:NodeList allocates memory only from nodes in NodeList > mpol=interleave prefers to allocate from each node in turn > mpol=interleave:NodeList allocates from each node of NodeList in turn > +mpol=local prefers to allocate memory from the local node > > NodeList format is a comma-separated list of decimal numbers and ranges, > a range being two hyphen-separated decimal numbers, the smallest and > @@ -134,3 +136,5 @@ Author: > Christoph Rohland , 1.12.01 > Updated: > Hugh Dickins, 4 June 2007 > +Updated: > + KOSAKI Motohiro, 16 Mar 2010