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| author | Artem Bityutskiy <artem.bityutskiy@linux.intel.com> | 2012-05-07 20:56:53 +0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2012-05-31 05:04:52 +0400 |
| commit | 8bdc81c5069e43755d6e59e5e990e21ca200e8e2 (patch) | |
| tree | eee9ff0210dcd0918a864b006feed14e5f715449 /fs/jffs2/super.c | |
| parent | 06688905cc36b86c700f376e9bc9bb68bc67d801 (diff) | |
| download | linux-8bdc81c5069e43755d6e59e5e990e21ca200e8e2.tar.xz | |
jffs2: get rid of jffs2_sync_super
Currently JFFS2 file-system maps the VFS "superblock" abstraction to the
write-buffer. Namely, it uses VFS services to synchronize the write-buffer
periodically.
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 superblock 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 no matter what. 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.
This patch switches the JFFS2 write-buffer management from
'->write_super()'/'->s_dirt' to a delayed work. Instead of setting the 's_dirt'
flag we just schedule a delayed work for synchronizing the write-buffer.
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/jffs2/super.c')
| -rw-r--r-- | fs/jffs2/super.c | 13 |
1 files changed, 0 insertions, 13 deletions
diff --git a/fs/jffs2/super.c b/fs/jffs2/super.c index dc366c0c9304..bc586f204228 100644 --- a/fs/jffs2/super.c +++ b/fs/jffs2/super.c @@ -63,18 +63,6 @@ static void jffs2_i_init_once(void *foo) inode_init_once(&f->vfs_inode); } -static void jffs2_write_super(struct super_block *sb) -{ - struct jffs2_sb_info *c = JFFS2_SB_INFO(sb); - - sb->s_dirt = 0; - - if (!(sb->s_flags & MS_RDONLY)) { - jffs2_dbg(1, "%s()\n", __func__); - jffs2_flush_wbuf_gc(c, 0); - } -} - static const char *jffs2_compr_name(unsigned int compr) { switch (compr) { @@ -246,7 +234,6 @@ static const struct super_operations jffs2_super_operations = .alloc_inode = jffs2_alloc_inode, .destroy_inode =jffs2_destroy_inode, .put_super = jffs2_put_super, - .write_super = jffs2_write_super, .statfs = jffs2_statfs, .remount_fs = jffs2_remount_fs, .evict_inode = jffs2_evict_inode, |