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| author | Hans Reiser <reiser@namesys.com> | 2008-05-07 15:48:57 +0300 |
|---|---|---|
| committer | Artem Bityutskiy <Artem.Bityutskiy@nokia.com> | 2008-07-14 19:10:52 +0300 |
| commit | ae8547b0a9e5d718ce272ddc48f91703a0f52a0b (patch) | |
| tree | e7caceb5171ae64c71b575d7fc38bdc319379791 /fs/fs-writeback.c | |
| parent | bce7f793daec3e65ec5c5705d2457b81fe7b5725 (diff) | |
| download | lwn-ae8547b0a9e5d718ce272ddc48f91703a0f52a0b.tar.gz lwn-ae8547b0a9e5d718ce272ddc48f91703a0f52a0b.zip | |
VFS: move inode_lock into sync_sb_inodes
This patch makes 'sync_sb_inodes()' lock 'inode_lock', rather
than expect that the caller will do this.
This change was previously done by Hans Reiser <reiser@namesys.com>
and sat in the -mm tree.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Diffstat (limited to 'fs/fs-writeback.c')
| -rw-r--r-- | fs/fs-writeback.c | 11 |
1 files changed, 3 insertions, 8 deletions
diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c index ae45f77765c0..16519fe1399c 100644 --- a/fs/fs-writeback.c +++ b/fs/fs-writeback.c @@ -424,8 +424,6 @@ __writeback_single_inode(struct inode *inode, struct writeback_control *wbc) * WB_SYNC_HOLD is a hack for sys_sync(): reattach the inode to sb->s_dirty so * that it can be located for waiting on in __writeback_single_inode(). * - * Called under inode_lock. - * * If `bdi' is non-zero then we're being asked to writeback a specific queue. * This function assumes that the blockdev superblock's inodes are backed by * a variety of queues, so all inodes are searched. For other superblocks, @@ -446,6 +444,7 @@ sync_sb_inodes(struct super_block *sb, struct writeback_control *wbc) { const unsigned long start = jiffies; /* livelock avoidance */ + spin_lock(&inode_lock); if (!wbc->for_kupdate || list_empty(&sb->s_io)) queue_io(sb, wbc->older_than_this); @@ -524,6 +523,7 @@ sync_sb_inodes(struct super_block *sb, struct writeback_control *wbc) if (!list_empty(&sb->s_more_io)) wbc->more_io = 1; } + spin_unlock(&inode_lock); return; /* Leave any unwritten inodes on s_io */ } @@ -565,11 +565,8 @@ restart: * be unmounted by the time it is released. */ if (down_read_trylock(&sb->s_umount)) { - if (sb->s_root) { - spin_lock(&inode_lock); + if (sb->s_root) sync_sb_inodes(sb, wbc); - spin_unlock(&inode_lock); - } up_read(&sb->s_umount); } spin_lock(&sb_lock); @@ -607,9 +604,7 @@ void sync_inodes_sb(struct super_block *sb, int wait) (inodes_stat.nr_inodes - inodes_stat.nr_unused) + nr_dirty + nr_unstable; wbc.nr_to_write += wbc.nr_to_write / 2; /* Bit more for luck */ - spin_lock(&inode_lock); sync_sb_inodes(sb, &wbc); - spin_unlock(&inode_lock); } /* |