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| author | Artem Bityutskiy <artem.bityutskiy@linux.intel.com> | 2012-07-12 16:28:08 +0300 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2012-07-22 23:58:16 +0400 |
| commit | 9e9ad5f408889db6038a59b38ede29ff1ba9ef2f (patch) | |
| tree | 1ceddb870378c5cd272959a54c18ed5909291d44 /fs/ufs/ufs.h | |
| parent | 7bd54ef722e9938768f524677be0ac4985d8473a (diff) | |
| download | linux-9e9ad5f408889db6038a59b38ede29ff1ba9ef2f.tar.bz2 | |
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>
Diffstat (limited to 'fs/ufs/ufs.h')
| -rw-r--r-- | fs/ufs/ufs.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/fs/ufs/ufs.h b/fs/ufs/ufs.h index 528750b7e701..343e6fc571e5 100644 --- a/fs/ufs/ufs.h +++ b/fs/ufs/ufs.h @@ -20,6 +20,10 @@ struct ufs_sb_info { unsigned s_mount_opt; struct mutex mutex; struct task_struct *mutex_owner; + struct super_block *sb; + int work_queued; /* non-zero if the delayed work is queued */ + struct delayed_work sync_work; /* FS sync delayed work */ + spinlock_t work_lock; /* protects sync_work and work_queued */ }; struct ufs_inode_info { @@ -123,6 +127,7 @@ extern __printf(3, 4) void ufs_error(struct super_block *, const char *, const char *, ...); extern __printf(3, 4) void ufs_panic(struct super_block *, const char *, const char *, ...); +void ufs_mark_sb_dirty(struct super_block *sb); /* symlink.c */ extern const struct inode_operations ufs_fast_symlink_inode_operations; |