[PATCH V8 7/8] ext4: add cleancache support
This seventh patch of eight in this cleancache series "opts-in"
cleancache for ext4. Filesystems must explicitly enable cleancache
by calling cleancache_init_fs anytime an instance of the filesystem
is mounted. For ext4, 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: jer...@goop.org: simplify init hook and any future fs init changes]
Signed-off-by: Dan Magenheimer <dan.magenhei...@oracle.com>
Reviewed-by: Jeremy Fitzhardinge <jer...@goop.org>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.w...@oracle.com>
Acked-by: Andreas Dilger <adil...@sun.com>
Cc: Ted Ts'o <ty...@mit.edu>
Cc: Andrew Morton <a...@linux-foundation.org>
Cc: Al Viro <v...@zeniv.linux.org.uk>
Cc: Matthew Wilcox <matt...@wil.cx>
Cc: Nick Piggin <npig...@kernel.dk>
Cc: Mel Gorman <m...@csn.ul.ie>
Cc: Rik Van Riel <r...@redhat.com>
Cc: Jan Beulich <jbeul...@novell.com>
Cc: Chris Mason <chris.ma...@oracle.com>
Cc: Mark Fasheh <mfas...@suse.com>
Cc: Joel Becker <joel.bec...@oracle.com>
Cc: Nitin Gupta <ngu...@vflare.org>
---
Diffstat:
fs/ext4/super.c | 2 ++
1 file changed, 2 insertions(+)
--- linux-2.6.39-rc3/fs/ext4/super.c 2011-04-11 18:21:51.000000000 -0600
+++ linux-2.6.39-rc3-cleancache/fs/ext4/super.c 2011-04-13 17:10:52.708850707
-0600
@@ -38,6 +38,7 @@
#include <linux/ctype.h>
#include <linux/log2.h>
#include <linux/crc16.h>
+#include <linux/cleancache.h>
#include <asm/uaccess.h>
#include <linux/kthread.h>
@@ -1932,6 +1933,7 @@ static int ext4_setup_super(struct super
EXT4_INODES_PER_GROUP(sb),
sbi->s_mount_opt, sbi->s_mount_opt2);
+ cleancache_init_fs(sb);
return res;
}
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