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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 /fs/btrfs
parent5a3f23d515a2ebf0c750db80579ca57b28cbce6d (diff)
downloadop-kernel-dev-d57e62b89796f751c9422801cbcd407a9f8dcdc4.zip
op-kernel-dev-d57e62b89796f751c9422801cbcd407a9f8dcdc4.tar.gz
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>
Diffstat (limited to 'fs/btrfs')
-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 0c482e0..f5e7cae 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,
if (owner_objectid >= BTRFS_FIRST_FREE_OBJECTID) {
ret = btrfs_del_csums(trans, root, bytenr, num_bytes);
BUG_ON(ret);
+ } else {
+ invalidate_mapping_pages(info->btree_inode->i_mapping,
+ bytenr >> PAGE_CACHE_SHIFT,
+ (bytenr + num_bytes - 1) >> PAGE_CACHE_SHIFT);
}
ret = update_block_group(trans, root, bytenr, num_bytes, 0,
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