Btrfs: try to drop dead cow pages from ram
Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
parent
28b8bb9e00
commit
06a2f9fa4c
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@ -6,8 +6,7 @@
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* Check compat and incompat flags on the inode
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* Check compat and incompat flags on the inode
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* Get rid of struct ctree_path, limiting tree levels held at one time
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* Get rid of struct ctree_path, limiting tree levels held at one time
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* Add generation number to key pointer in nodes
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* Add generation number to key pointer in nodes
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* Add parent pointer back to extent map.
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* Add generation number to inode
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* Implement real list of pending transactions
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* Release
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* Release
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* Do real tree locking
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* Do real tree locking
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* Add extent mirroring (backup copies of blocks)
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* Add extent mirroring (backup copies of blocks)
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@ -291,10 +291,18 @@ static int update_block_group(struct btrfs_trans_handle *trans,
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return 0;
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return 0;
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}
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}
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static int try_remove_page(struct address_space *mapping, unsigned long index)
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{
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int ret;
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ret = invalidate_mapping_pages(mapping, index, index);
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return ret;
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}
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int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans, struct
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int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans, struct
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btrfs_root *root)
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btrfs_root *root)
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{
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{
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unsigned long gang[8];
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unsigned long gang[8];
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struct inode *btree_inode = root->fs_info->btree_inode;
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u64 first = 0;
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u64 first = 0;
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int ret;
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int ret;
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int i;
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int i;
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@ -309,6 +317,9 @@ int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans, struct
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first = gang[0];
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first = gang[0];
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for (i = 0; i < ret; i++) {
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for (i = 0; i < ret; i++) {
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clear_radix_bit(pinned_radix, gang[i]);
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clear_radix_bit(pinned_radix, gang[i]);
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try_remove_page(btree_inode->i_mapping,
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gang[i] << (PAGE_CACHE_SHIFT -
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btree_inode->i_blkbits));
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}
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}
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}
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}
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if (root->fs_info->block_group_cache) {
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if (root->fs_info->block_group_cache) {
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@ -600,6 +611,12 @@ check_pending:
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*/
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*/
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btrfs_release_path(root, path);
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btrfs_release_path(root, path);
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BUG_ON(ins->objectid < search_start);
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BUG_ON(ins->objectid < search_start);
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if (ins->objectid >= btrfs_super_total_blocks(info->disk_super)) {
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if (search_start == 0)
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return -ENOSPC;
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search_start = 0;
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goto check_failed;
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}
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for (test_block = ins->objectid;
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for (test_block = ins->objectid;
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test_block < ins->objectid + num_blocks; test_block++) {
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test_block < ins->objectid + num_blocks; test_block++) {
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if (test_radix_bit(&info->pinned_radix, test_block)) {
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if (test_radix_bit(&info->pinned_radix, test_block)) {
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