linux-kernel - Re: [patch 15/19] Filesystem: XFS slab defragmentation

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Message-ID: <489705E6.70103@linux-foundation.org>
Date:	Mon, 04 Aug 2008 08:36:38 -0500
From:	Christoph Lameter <cl@...ux-foundation.org>
To:	Christoph Lameter <cl@...ux-foundation.org>,
	Pekka Enberg <penberg@...helsinki.fi>,
	akpm@...ux-foundation.org, Christoph Lameter <clameter@....com>,
	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	Mel Gorman <mel@...net.ie>, andi@...stfloor.org,
	Rik van Riel <riel@...hat.com>, mpm@...enic.com
Subject: Re: [patch 15/19] Filesystem: XFS slab defragmentation

Dave Chinner wrote:

> I think that hunk is mis-applied. You're configuring the
> xfs_vnode_zone defrag after allocating the xfs_ioend_zone. This
> should be afew lines higher up, right?

That would be nicer but its not a bug to have the setup where it is right now.

Fix:


Subject: defrag/xfs: Move defrag setup directly after xfs_vnode_zone kmem
cache creation

Move the setup of the defrag directly after the creation of the xfs_vnode_zone

Signed-off-by: Christoph Lameter <cl@...ux-foundation.org>

Index: linux-2.6/fs/xfs/linux-2.6/xfs_super.c
===================================================================
--- linux-2.6.orig/fs/xfs/linux-2.6/xfs_super.c	2008-08-04 08:27:09.000000000
-0500
+++ linux-2.6/fs/xfs/linux-2.6/xfs_super.c	2008-08-04 08:27:25.000000000 -0500
@@ -2021,11 +2021,11 @@
 	if (!xfs_vnode_zone)
 		goto out;

+	kmem_cache_setup_defrag(xfs_vnode_zone, get_inodes, kick_inodes);
+
 	xfs_ioend_zone = kmem_zone_init(sizeof(xfs_ioend_t), "xfs_ioend");
 	if (!xfs_ioend_zone)
 		goto out_destroy_vnode_zone;
-	kmem_cache_setup_defrag(xfs_vnode_zone, get_inodes, kick_inodes);
-
 	xfs_ioend_pool = mempool_create_slab_pool(4 * MAX_BUF_PER_PAGE,
 						  xfs_ioend_zone);
 	if (!xfs_ioend_pool)
--
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