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| author | Yan, Zheng <zheng.yan@oracle.com> | 2010-05-16 10:46:25 -0400 |
|---|---|---|
| committer | Chris Mason <chris.mason@oracle.com> | 2010-05-25 10:34:48 -0400 |
| commit | 5da9d01b66458b180a6bee0e637a1d0a3effc622 (patch) | |
| tree | 47eca61c0ad07ddc791cb7677c548d663fbac818 /fs/btrfs/inode.c | |
| parent | 424499dbd0c4d88742bf581b5714b27fb44b9fef (diff) | |
| download | lwn-5da9d01b66458b180a6bee0e637a1d0a3effc622.tar.gz lwn-5da9d01b66458b180a6bee0e637a1d0a3effc622.zip | |
Btrfs: Shrink delay allocated space in a synchronized
Shrink delayed allocation space in a synchronized manner is more
controllable than flushing all delay allocated space in an async
thread.
Signed-off-by: Yan Zheng <zheng.yan@oracle.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/inode.c')
| -rw-r--r-- | fs/btrfs/inode.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 2bfdc641d4e3..d53cad1afe26 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -5611,6 +5611,38 @@ int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput) return 0; } +int btrfs_start_one_delalloc_inode(struct btrfs_root *root, int delay_iput) +{ + struct btrfs_inode *binode; + struct inode *inode = NULL; + + spin_lock(&root->fs_info->delalloc_lock); + while (!list_empty(&root->fs_info->delalloc_inodes)) { + binode = list_entry(root->fs_info->delalloc_inodes.next, + struct btrfs_inode, delalloc_inodes); + inode = igrab(&binode->vfs_inode); + if (inode) { + list_move_tail(&binode->delalloc_inodes, + &root->fs_info->delalloc_inodes); + break; + } + + list_del_init(&binode->delalloc_inodes); + cond_resched_lock(&root->fs_info->delalloc_lock); + } + spin_unlock(&root->fs_info->delalloc_lock); + + if (inode) { + write_inode_now(inode, 0); + if (delay_iput) + btrfs_add_delayed_iput(inode); + else + iput(inode); + return 1; + } + return 0; +} + static int btrfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname) { |