[PATCH V8 5/8] ext3: add cleancache support

From: Dan Magenheimer
Date: Thu Apr 14 2011 - 17:21:27 EST

[PATCH V8 5/8] ext3: add cleancache support

This fifth patch of eight in this cleancache series "opts-in"
cleancache for ext3. Filesystems must explicitly enable
cleancache by calling cleancache_init_fs anytime an instance
of the filesystem is mounted. For ext3, all other cleancache
hooks are in the VFS layer including the matching cleancache_flush_fs
hook which must be called on unmount.

Details and a FAQ can be found in Documentation/vm/cleancache.txt

[v6-v8: no changes]
[v5: jeremy@xxxxxxxx: simplify init hook and any future fs init changes]
Signed-off-by: Dan Magenheimer <dan.magenheimer@xxxxxxxxxx>
Reviewed-by: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
Acked-by: Andreas Dilger <adilger@xxxxxxx>
Cc: Ted Ts'o <tytso@xxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Cc: Matthew Wilcox <matthew@xxxxxx>
Cc: Nick Piggin <npiggin@xxxxxxxxx>
Cc: Mel Gorman <mel@xxxxxxxxx>
Cc: Rik Van Riel <riel@xxxxxxxxxx>
Cc: Jan Beulich <JBeulich@xxxxxxxxxx>
Cc: Chris Mason <chris.mason@xxxxxxxxxx>
Cc: Mark Fasheh <mfasheh@xxxxxxxx>
Cc: Joel Becker <joel.becker@xxxxxxxxxx>
Cc: Nitin Gupta <ngupta@xxxxxxxxxx>


fs/ext3/super.c | 2 ++
1 file changed, 2 insertions(+)

--- linux-2.6.39-rc3/fs/ext3/super.c 2011-04-11 18:21:51.000000000 -0600
+++ linux-2.6.39-rc3-cleancache/fs/ext3/super.c 2011-04-13 17:10:40.918915872 -0600
@@ -36,6 +36,7 @@
#include <linux/quotaops.h>
#include <linux/seq_file.h>
#include <linux/log2.h>
+#include <linux/cleancache.h>

#include <asm/uaccess.h>

@@ -1367,6 +1368,7 @@ static int ext3_setup_super(struct super
} else {
ext3_msg(sb, KERN_INFO, "using internal journal");
+ cleancache_init_fs(sb);
return res;

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