* Cleancache [PATCH 6/7] (was Transcendent Memory): ext4 hook
@ 2010-04-22 13:29 Dan Magenheimer
2010-04-28 23:08 ` Andreas Dilger
0 siblings, 1 reply; 2+ messages in thread
From: Dan Magenheimer @ 2010-04-22 13:29 UTC (permalink / raw)
To: chris.mason, viro, akpm, adilger, tytso, mfasheh, joel.becker,
matthew, linux-btrfs, linux-kernel, linux-fsdevel, linux-ext4,
ocfs2-devel, linux-mm, ngupta, jeremy, JBeulich, kurt.hackel,
npiggin, dave.mccracken, riel
Cleancache [PATCH 6/7] (was Transcendent Memory): ext4 hook
Filesystems must explicitly enable cleancache. For ext4,
all other cleancache hooks are in the VFS layer.
Signed-off-by: Dan Magenheimer <dan.magenheimer@oracle.com>
Diffstat:
super.c | 2 ++
1 file changed, 2 insertions(+)
--- linux-2.6.34-rc5/fs/ext4/super.c 2010-04-19 17:29:56.000000000 -0600
+++ linux-2.6.34-rc5-cleancache/fs/ext4/super.c 2010-04-21 10:13:00.000000000 -0600
@@ -39,6 +39,7 @@
#include <linux/ctype.h>
#include <linux/log2.h>
#include <linux/crc16.h>
+#include <linux/cleancache.h>
#include <asm/uaccess.h>
#include "ext4.h"
@@ -1784,6 +1785,7 @@ static int ext4_setup_super(struct super
EXT4_INODES_PER_GROUP(sb),
sbi->s_mount_opt);
+ sb->cleancache_poolid = cleancache_init_fs(PAGE_SIZE);
return res;
}
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: Cleancache [PATCH 6/7] (was Transcendent Memory): ext4 hook
2010-04-22 13:29 Cleancache [PATCH 6/7] (was Transcendent Memory): ext4 hook Dan Magenheimer
@ 2010-04-28 23:08 ` Andreas Dilger
0 siblings, 0 replies; 2+ messages in thread
From: Andreas Dilger @ 2010-04-28 23:08 UTC (permalink / raw)
To: Dan Magenheimer
Cc: Chris Mason, Al Viro, Andrew Morton, Theodore Ts'o, mfasheh,
Joel Becker, Matthew Wilcox, linux-btrfs,
linux-kernel@vger.kernel.org Mailinglist, linux-fsdevel,
linux-ext4 development, ocfs2-devel, linux-mm, ngupta,
Jeremy Fitzhardinge, JBeulich, kurt.hackel, Nick Piggin,
dave.mccracken, Rik van Riel
On 2010-04-22, at 07:29, Dan Magenheimer wrote:
> Cleancache [PATCH 6/7] (was Transcendent Memory): ext4 hook
>
> Filesystems must explicitly enable cleancache. For ext4,
> all other cleancache hooks are in the VFS layer.
>
> Signed-off-by: Dan Magenheimer <dan.magenheimer@oracle.com>
Given the minimal changes being done to ext3/ext4, I don't have any objection to this. Being able to hook ext4 into SSDs for hierarchical caching is something that will become increasingly important for huge ext4 filesystems.
Acked-by: Andreas Dilger <adilger@sun.com>
> Diffstat:
> super.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> --- linux-2.6.34-rc5/fs/ext4/super.c 2010-04-19 17:29:56.000000000 -0600
> +++ linux-2.6.34-rc5-cleancache/fs/ext4/super.c 2010-04-21 10:13:00.000000000 -0600
> @@ -39,6 +39,7 @@
> #include <linux/ctype.h>
> #include <linux/log2.h>
> #include <linux/crc16.h>
> +#include <linux/cleancache.h>
> #include <asm/uaccess.h>
>
> #include "ext4.h"
> @@ -1784,6 +1785,7 @@ static int ext4_setup_super(struct super
> EXT4_INODES_PER_GROUP(sb),
> sbi->s_mount_opt);
>
> + sb->cleancache_poolid = cleancache_init_fs(PAGE_SIZE);
> return res;
> }
Cheers, Andreas
--
Andreas Dilger
Sr. Staff Engineer, Lustre Group
Sun Microsystems of Canada, Inc.
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