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| author | Josef Bacik <josef@redhat.com> | 2011-04-05 13:02:27 -0400 |
|---|---|---|
| committer | Josef Bacik <josef@redhat.com> | 2011-04-08 13:00:34 -0400 |
| commit | 12ddb96cb6752218d8a1aeb696ec9b0ca7adb42f (patch) | |
| tree | cffdb38f2f479dde85d5f96879e53ac4b8f4d6ef /fs/btrfs | |
| parent | 06d5a5899d6d3ac401d2359b5eac6d2a3a0fe331 (diff) | |
| download | lwn-12ddb96cb6752218d8a1aeb696ec9b0ca7adb42f.tar.gz lwn-12ddb96cb6752218d8a1aeb696ec9b0ca7adb42f.zip | |
Btrfs: map the inode item when doing fill_inode_item
Instead of calling kmap_atomic for every thing we set in the inode item, map the
entire inode item at the start and unmap it at the end. This makes a sequential
dd of 400mb O_DIRECT something like 1% faster. Thanks,
Signed-off-by: Josef Bacik <josef@redhat.com>
Diffstat (limited to 'fs/btrfs')
| -rw-r--r-- | fs/btrfs/inode.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index cc6022842e0c..da2680263d9f 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -2589,6 +2589,13 @@ static void fill_inode_item(struct btrfs_trans_handle *trans, struct btrfs_inode_item *item, struct inode *inode) { + if (!leaf->map_token) + map_private_extent_buffer(leaf, (unsigned long)item, + sizeof(struct btrfs_inode_item), + &leaf->map_token, &leaf->kaddr, + &leaf->map_start, &leaf->map_len, + KM_USER1); + btrfs_set_inode_uid(leaf, item, inode->i_uid); btrfs_set_inode_gid(leaf, item, inode->i_gid); btrfs_set_inode_size(leaf, item, BTRFS_I(inode)->disk_i_size); @@ -2617,6 +2624,11 @@ static void fill_inode_item(struct btrfs_trans_handle *trans, btrfs_set_inode_rdev(leaf, item, inode->i_rdev); btrfs_set_inode_flags(leaf, item, BTRFS_I(inode)->flags); btrfs_set_inode_block_group(leaf, item, BTRFS_I(inode)->block_group); + + if (leaf->map_token) { + unmap_extent_buffer(leaf, leaf->map_token, KM_USER1); + leaf->map_token = NULL; + } } /* |