linux-ext4 - [PATCH][RFC] kjournald affinity patch

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Message-id: <6CCA0618-5E60-42E2-B9B5-96B16185CB92@sun.com>
Date:	Fri, 04 Dec 2009 17:08:34 -0700
From:	Andreas Dilger <adilger@....com>
To:	Ext4 Developers List <linux-ext4@...r.kernel.org>
Cc:	Johann Lombardi <johann@....com>
Subject: [PATCH][RFC] kjournald affinity patch

Per discussion on the ext4 concall, attached is a basic version of the  
journal affinity patch against an older kernel (2.6.10) and ext3, but  
looking at the patch it doesn't seem very dependent upon the ext3/ext4  
version at all and can probably be .

This defaults to enabling NUMA affinity if CONFIG_NUMA is enabled, so  
per our discussion it probably needs a mount option that will enable  
it only if specified.  We had discussed  
"journal_affinity={off,on,node#}" or "={none,auto,node#}" as  
possibilities.

Original patch was developed by someone at Bull (possibly even Johann,  
when he worked there), but I don't have the exact attribution.

Cheers, Andreas
--
Andreas Dilger
Sr. Staff Engineer, Lustre Group
Sun Microsystems of Canada, Inc.

Download attachment "kjournald-affinity.patch" of type "application/octet-stream" (1358 bytes)