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| author | Artem Bityutskiy <artem.bityutskiy@linux.intel.com> | 2012-06-06 18:56:57 +0300 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2012-07-14 16:32:45 +0400 |
| commit | 3dd847820d138c9d60764b0e920380373285ff10 (patch) | |
| tree | 3eb6584eac00b8a6cf859d003ad0c1940e7e299c /fs/affs/affs.h | |
| parent | a215fef7edfdcd8948037ceb3060b9ae7ebcef8b (diff) | |
| download | lwn-3dd847820d138c9d60764b0e920380373285ff10.tar.gz lwn-3dd847820d138c9d60764b0e920380373285ff10.zip | |
affs: get rid of affs_sync_super
This patch makes affs stop using the VFS '->write_super()' method along with
the 's_dirt' superblock flag, because they are on their way out.
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.
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/affs/affs.h')
| -rw-r--r-- | fs/affs/affs.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/affs/affs.h b/fs/affs/affs.h index 5a726e992245..3a130e27eb15 100644 --- a/fs/affs/affs.h +++ b/fs/affs/affs.h @@ -3,6 +3,7 @@ #include <linux/buffer_head.h> #include <linux/amigaffs.h> #include <linux/mutex.h> +#include <linux/workqueue.h> /* AmigaOS allows file names with up to 30 characters length. * Names longer than that will be silently truncated. If you @@ -101,6 +102,9 @@ struct affs_sb_info { char s_volume[32]; /* Volume prefix for absolute symlinks. */ spinlock_t symlink_lock; /* protects the previous two */ struct super_block *sb; /* the VFS superblock object */ + int work_queued; /* non-zero delayed work is queued */ + struct delayed_work sb_work; /* superblock flush delayed work */ + spinlock_t work_lock; /* protects sb_work and work_queued */ }; #define SF_INTL 0x0001 /* International filesystem. */ @@ -121,6 +125,8 @@ static inline struct affs_sb_info *AFFS_SB(struct super_block *sb) return sb->s_fs_info; } +void affs_mark_sb_dirty(struct super_block *sb); + /* amigaffs.c */ extern int affs_insert_hash(struct inode *inode, struct buffer_head *bh); |