This patch-set makes reiserfs file-system stop using the VFS '->write_supers()' call-back and the '->s_dirt' superblock field because I plan to remove them once all users are gone. This patch-set makes reiserfs submit a delayed job for writing out old commits instead of using 's_dirt'. The goal is to get rid of the 'sync_supers()' kernel thread. This kernel thread wakes up every 5 seconds (by default) and calls '->write_super()' for all mounted file-systems. And the bad thing is that this is done even if all the superblocks are clean. Moreover, many file-systems do not even need this end they do not register the '->write_super()' method at all (e.g., btrfs). So 'sync_supers()' most often just generates useless wake-ups and wastes power. I am trying to make all file-systems independent of '->write_super()' and plan to remove 'sync_supers()' and '->write_super()' completely once there are no more users. The '->write_supers()' method is mostly used by baroque file-systems like hfs, udf, etc. Modern file-systems like btrfs and xfs do not use it. This justifies removing this stuff from VFS completely and make every FS self-manage own superblock. Al, in the past I was trying to upstream patches which optimized 'sync_super()', but you wanted me to kill it completely instead, which I am trying to do now, see http://lkml.org/lkml/2010/7/22/96 Tested using xfstests. ====== Overall status: 1. ext4: patches submitted, waiting for reply from Ted Ts'o: https://lkml.org/lkml/2012/4/2/111 Ted keeps silence so far WRT the fate of this patch-set. 2. ext2: done, see commit f72cf5e223a28d3b3ea7dc9e40464fd534e359e8 3. vfat: done, see commit 78491189ddb6d84d4a4abae992ed891a236d0263 4. jffs2: sits the mtd subsystem tree, see commit 208b14e507c00ff7f108e1a388dd3d8cc805a443 in git://git.infradead.org/linux-mtd.git TODO: affs, exofs, hfs, hfsplus, sysv, udf, ufs ====== Thanks, Artem. -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
