diff options
| author | Chris Mason <chris.mason@oracle.com> | 2007-04-28 08:48:10 -0400 |
|---|---|---|
| committer | David Woodhouse <dwmw2@hera.kernel.org> | 2007-04-28 08:48:10 -0400 |
| commit | 06a2f9fa4c12a055cc396936408a78ae0acfb6b4 (patch) | |
| tree | 49770115618c2637e80b4d8d6ee540bc86b3c979 /fs | |
| parent | 28b8bb9e001aa1c4abdd10a8e36972658237fe43 (diff) | |
Btrfs: try to drop dead cow pages from ram
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/btrfs/TODO | 3 | ||||
| -rw-r--r-- | fs/btrfs/extent-tree.c | 17 |
2 files changed, 18 insertions, 2 deletions
diff --git a/fs/btrfs/TODO b/fs/btrfs/TODO index 5ff2cef9f02..6a8c8cd03ca 100644 --- a/fs/btrfs/TODO +++ b/fs/btrfs/TODO @@ -6,8 +6,7 @@ * Check compat and incompat flags on the inode * Get rid of struct ctree_path, limiting tree levels held at one time * Add generation number to key pointer in nodes -* Add parent pointer back to extent map. -* Implement real list of pending transactions +* Add generation number to inode * Release * Do real tree locking * Add extent mirroring (backup copies of blocks) diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index aca5802a8a1..afc5267515e 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -291,10 +291,18 @@ static int update_block_group(struct btrfs_trans_handle *trans, return 0; } +static int try_remove_page(struct address_space *mapping, unsigned long index) +{ + int ret; + ret = invalidate_mapping_pages(mapping, index, index); + return ret; +} + int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans, struct btrfs_root *root) { unsigned long gang[8]; + struct inode *btree_inode = root->fs_info->btree_inode; u64 first = 0; int ret; int i; @@ -309,6 +317,9 @@ int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans, struct first = gang[0]; for (i = 0; i < ret; i++) { clear_radix_bit(pinned_radix, gang[i]); + try_remove_page(btree_inode->i_mapping, + gang[i] << (PAGE_CACHE_SHIFT - + btree_inode->i_blkbits)); } } if (root->fs_info->block_group_cache) { @@ -600,6 +611,12 @@ check_pending: */ btrfs_release_path(root, path); BUG_ON(ins->objectid < search_start); + if (ins->objectid >= btrfs_super_total_blocks(info->disk_super)) { + if (search_start == 0) + return -ENOSPC; + search_start = 0; + goto check_failed; + } for (test_block = ins->objectid; test_block < ins->objectid + num_blocks; test_block++) { if (test_radix_bit(&info->pinned_radix, test_block)) { |