linux/fs/ufs
Artem Bityutskiy 9e9ad5f408 fs/ufs: get rid of write_super
This patch makes UFS stop using the VFS '->write_super()' method along with
the 's_dirt' superblock flag, because they are on their way out.

The way we implement this is that we schedule a delay job instead relying on
's_dirt' and '->write_super()'.

The whole "superblock write-out" VFS infrastructure is served by the
'sync_supers()' kernel thread, which wakes up every 5 (by default) seconds and
writes out all dirty superblocks using the '->write_super()' call-back.  But the
problem with this thread is that it wastes power by waking up the system every
5 seconds, even if there are no diry superblocks, or there are no client
file-systems which would need this (e.g., btrfs does not use
'->write_super()'). So we want to kill it completely and thus, we need to make
file-systems to stop using the '->write_super()' VFS service, and then remove
it together with the kernel thread.

Tested using fsstress from the LTP project.

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-07-22 23:58:16 +04:00
..
Kconfig ufs: remove the BKL 2011-03-02 22:27:48 +01:00
Makefile
balloc.c fs/ufs: get rid of write_super 2012-07-22 23:58:16 +04:00
cylinder.c drop linux/ufs_fs.h from userspace export and relocate it to fs/ufs/ufs_fs.h 2008-02-08 09:22:39 -08:00
dir.c clean up write_begin usage for directories in pagecache 2010-08-09 16:47:31 -04:00
file.c Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs-2.6 2010-05-30 09:11:11 -07:00
ialloc.c fs/ufs: get rid of write_super 2012-07-22 23:58:16 +04:00
inode.c vfs: Rename end_writeback() to clear_inode() 2012-05-06 13:43:41 +08:00
namei.c don't pass nameidata to ->create() 2012-07-14 16:34:47 +04:00
super.c fs/ufs: get rid of write_super 2012-07-22 23:58:16 +04:00
swab.h ufs: replace __inline with inline 2008-04-28 08:58:45 -07:00
symlink.c ufs: add ufs speciffic ->setattr call 2010-05-21 19:30:40 +02:00
truncate.c ufs: fix truncated values handling 64 bit metadata 2011-05-26 17:12:33 -07:00
ufs.h fs/ufs: get rid of write_super 2012-07-22 23:58:16 +04:00
ufs_fs.h fs/ufs: get rid of write_super 2012-07-22 23:58:16 +04:00
util.c ufs: remove the BKL 2011-03-02 22:27:48 +01:00
util.h ufs: use little-endian bitops 2011-03-23 19:46:19 -07:00