This patch-set makes HFS 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. Like the other similar patch-sets, we switch to a delayed job for writing out the superblock instead of using the 's_dirt' flag. Additionally, this patch-set includes several clean-ups. Reminder: 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. 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 the fsstress test from the LTP project. ====== Overall status: 1. ext4: patches submitted, waiting for review from Ted Ts'o: https://lkml.org/lkml/2012/4/2/111 2. udf: patch submitted, should be in Jan Kara's tree: https://lkml.org/lkml/2012/6/4/233 3 exofs: patch submitted, not sure if it will go to the exofs tree: https://lkml.org/lkml/2012/6/4/211 4. affs: patches submitted, should be in Al Viro's tree: https://lkml.org/lkml/2012/6/6/400 4. ext2: done, see commit f72cf5e223a28d3b3ea7dc9e40464fd534e359e8 5. vfat: done, see commit 78491189ddb6d84d4a4abae992ed891a236d0263 6. jffs2: done, see commit 208b14e507c00ff7f108e1a388dd3d8cc805a443 7. reiserfs: done, see commit 033369d1af1264abc23bea2e174aa47cdd212f6f TODO: hfsplus, sysv, ufs ====== fs/hfs/extent.c | 2 +- fs/hfs/hfs_fs.h | 15 +++++++---- fs/hfs/inode.c | 14 +++------- fs/hfs/mdb.c | 15 +++++++++++ fs/hfs/super.c | 73 +++++++++++++++++++++++++++---------------------------- 5 files changed, 65 insertions(+), 54 deletions(-) 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
