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Btrfs: fix memory leak of log roots

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When we abort a transaction while fsyncing, we'll skip freeing log roots
part of committing a transaction, which leads to memory leak.

This adds a 'free log roots' in putting super when no more users hold
references on log roots, so it's safe and clean.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
This commit is contained in:
Liu Bo 2013-02-27 13:28:24 +00:00 committed by Josef Bacik
parent bdc20e67e8
commit 3321719ed6
2 changed files with 9 additions and 2 deletions
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5
fs/btrfs/disk-io.c
View File

@ -3253,6 +3253,11 @@ void btrfs_free_fs_root(struct btrfs_fs_info *fs_info, struct btrfs_root *root)
if (btrfs_root_refs(&root->root_item) == 0)
synchronize_srcu(&fs_info->subvol_srcu);
if (fs_info->fs_state & BTRFS_SUPER_FLAG_ERROR) {
btrfs_free_log(NULL, root);
btrfs_free_log_root_tree(NULL, fs_info);
}
__btrfs_remove_free_space_cache(root->free_ino_pinned);
__btrfs_remove_free_space_cache(root->free_ino_ctl);
free_fs_root(root);

6
fs/btrfs/tree-log.c
View File

@ -2466,8 +2466,10 @@ static void free_log_tree(struct btrfs_trans_handle *trans,
.process_func = process_one_buffer
};
ret = walk_log_tree(trans, log, &wc);
BUG_ON(ret);
if (trans) {
ret = walk_log_tree(trans, log, &wc);
BUG_ON(ret);
}
while (1) {
ret = find_first_extent_bit(&log->dirty_log_pages,