[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: 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> --- 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; } -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>