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authorChris Mason <chris.mason@oracle.com>2009-03-31 13:47:50 -0400
committerChris Mason <chris.mason@oracle.com>2009-03-31 14:27:58 -0400
commitd57e62b89796f751c9422801cbcd407a9f8dcdc4 (patch)
tree353960256ddf5f92aa391a2ea570bea1d2d11fa8
parent5a3f23d515a2ebf0c750db80579ca57b28cbce6d (diff)
Btrfs: try to free metadata pages when we free btree blocks
COW means we cycle though blocks fairly quickly, and once we free an extent on disk, it doesn't make much sense to keep the pages around. This commit tries to immediately free the page when we free the extent, which lowers our memory footprint significantly. Signed-off-by: Chris Mason <chris.mason@oracle.com>
-rw-r--r--fs/btrfs/extent-tree.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 0c482e0d7c43..f5e7cae63d80 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -2384,6 +2384,10 @@ static int __free_extent(struct btrfs_trans_handle *trans,
2384 if (owner_objectid >= BTRFS_FIRST_FREE_OBJECTID) { 2384 if (owner_objectid >= BTRFS_FIRST_FREE_OBJECTID) {
2385 ret = btrfs_del_csums(trans, root, bytenr, num_bytes); 2385 ret = btrfs_del_csums(trans, root, bytenr, num_bytes);
2386 BUG_ON(ret); 2386 BUG_ON(ret);
2387 } else {
2388 invalidate_mapping_pages(info->btree_inode->i_mapping,
2389 bytenr >> PAGE_CACHE_SHIFT,
2390 (bytenr + num_bytes - 1) >> PAGE_CACHE_SHIFT);
2387 } 2391 }
2388 2392
2389 ret = update_block_group(trans, root, bytenr, num_bytes, 0, 2393 ret = update_block_group(trans, root, bytenr, num_bytes, 0,