linux-kernel - [PATCH 47/58] [GFS2] Allow page migration for writeback and ordered pages

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Message-Id: <21533d0d9964d00cc9a39a175da1dc77d9a0a877.1200905287.git.swhiteho@redhat.com>
Date:	Mon, 21 Jan 2008 09:22:05 +0000
From:	swhiteho@...hat.com
To:	linux-kernel@...r.kernel.org, cluster-devel@...hat.com
Cc:	Steven Whitehouse <swhiteho@...hat.com>
Subject: [PATCH 47/58] [GFS2] Allow page migration for writeback and ordered pages

From: Steven Whitehouse <swhiteho@...hat.com>

To improve performance on NUMA, we use the VM's standard page
migration for writeback and ordered pages. Probably we could
also do the same for journaled data, but that would need a
careful audit of the code, so will be the subject of a later
patch.

Signed-off-by: Steven Whitehouse <swhiteho@...hat.com>

diff --git a/fs/gfs2/ops_address.c b/fs/gfs2/ops_address.c
index 8f94e30..e16ad81 100644
--- a/fs/gfs2/ops_address.c
+++ b/fs/gfs2/ops_address.c
@@ -1098,6 +1098,7 @@ static const struct address_space_operations gfs2_writeback_aops = {
 	.invalidatepage = gfs2_invalidatepage,
 	.releasepage = gfs2_releasepage,
 	.direct_IO = gfs2_direct_IO,
+	.migratepage = buffer_migrate_page,
 };
 
 static const struct address_space_operations gfs2_ordered_aops = {
@@ -1112,6 +1113,7 @@ static const struct address_space_operations gfs2_ordered_aops = {
 	.invalidatepage = gfs2_invalidatepage,
 	.releasepage = gfs2_releasepage,
 	.direct_IO = gfs2_direct_IO,
+	.migratepage = buffer_migrate_page,
 };
 
 static const struct address_space_operations gfs2_jdata_aops = {
-- 
1.5.1.2

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