diff options
author | David Sterba <dsterba@suse.cz> | 2011-05-05 11:13:16 (GMT) |
---|---|---|
committer | David Sterba <dsterba@suse.cz> | 2011-05-06 10:34:10 (GMT) |
commit | 182608c8294b5fe90d7bbd4b026c82bf0a24b736 (patch) | |
tree | 5705e84960e66caa84ac059a3528a31493e35d16 /fs/btrfs/transaction.c | |
parent | f2a97a9dbd86eb1ef956bdf20e05c507b32beb96 (diff) | |
download | linux-fsl-qoriq-182608c8294b5fe90d7bbd4b026c82bf0a24b736.tar.xz |
btrfs: remove old unused commented out code
Remove code which has been #if0-ed out for a very long time and does not
seem to be related to current codebase anymore.
Signed-off-by: David Sterba <dsterba@suse.cz>
Diffstat (limited to 'fs/btrfs/transaction.c')
-rw-r--r-- | fs/btrfs/transaction.c | 134 |
1 files changed, 0 insertions, 134 deletions
diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c index 955f76e..211acee 100644 --- a/fs/btrfs/transaction.c +++ b/fs/btrfs/transaction.c @@ -346,49 +346,6 @@ out_unlock: return ret; } -#if 0 -/* - * rate limit against the drop_snapshot code. This helps to slow down new - * operations if the drop_snapshot code isn't able to keep up. - */ -static void throttle_on_drops(struct btrfs_root *root) -{ - struct btrfs_fs_info *info = root->fs_info; - int harder_count = 0; - -harder: - if (atomic_read(&info->throttles)) { - DEFINE_WAIT(wait); - int thr; - thr = atomic_read(&info->throttle_gen); - - do { - prepare_to_wait(&info->transaction_throttle, - &wait, TASK_UNINTERRUPTIBLE); - if (!atomic_read(&info->throttles)) { - finish_wait(&info->transaction_throttle, &wait); - break; - } - schedule(); - finish_wait(&info->transaction_throttle, &wait); - } while (thr == atomic_read(&info->throttle_gen)); - harder_count++; - - if (root->fs_info->total_ref_cache_size > 1 * 1024 * 1024 && - harder_count < 2) - goto harder; - - if (root->fs_info->total_ref_cache_size > 5 * 1024 * 1024 && - harder_count < 10) - goto harder; - - if (root->fs_info->total_ref_cache_size > 10 * 1024 * 1024 && - harder_count < 20) - goto harder; - } -} -#endif - void btrfs_throttle(struct btrfs_root *root) { mutex_lock(&root->fs_info->trans_mutex); @@ -808,97 +765,6 @@ int btrfs_defrag_root(struct btrfs_root *root, int cacheonly) return ret; } -#if 0 -/* - * when dropping snapshots, we generate a ton of delayed refs, and it makes - * sense not to join the transaction while it is trying to flush the current - * queue of delayed refs out. - * - * This is used by the drop snapshot code only - */ -static noinline int wait_transaction_pre_flush(struct btrfs_fs_info *info) -{ - DEFINE_WAIT(wait); - - mutex_lock(&info->trans_mutex); - while (info->running_transaction && - info->running_transaction->delayed_refs.flushing) { - prepare_to_wait(&info->transaction_wait, &wait, - TASK_UNINTERRUPTIBLE); - mutex_unlock(&info->trans_mutex); - - schedule(); - - mutex_lock(&info->trans_mutex); - finish_wait(&info->transaction_wait, &wait); - } - mutex_unlock(&info->trans_mutex); - return 0; -} - -/* - * Given a list of roots that need to be deleted, call btrfs_drop_snapshot on - * all of them - */ -int btrfs_drop_dead_root(struct btrfs_root *root) -{ - struct btrfs_trans_handle *trans; - struct btrfs_root *tree_root = root->fs_info->tree_root; - unsigned long nr; - int ret; - - while (1) { - /* - * we don't want to jump in and create a bunch of - * delayed refs if the transaction is starting to close - */ - wait_transaction_pre_flush(tree_root->fs_info); - trans = btrfs_start_transaction(tree_root, 1); - - /* - * we've joined a transaction, make sure it isn't - * closing right now - */ - if (trans->transaction->delayed_refs.flushing) { - btrfs_end_transaction(trans, tree_root); - continue; - } - - ret = btrfs_drop_snapshot(trans, root); - if (ret != -EAGAIN) - break; - - ret = btrfs_update_root(trans, tree_root, - &root->root_key, - &root->root_item); - if (ret) - break; - - nr = trans->blocks_used; - ret = btrfs_end_transaction(trans, tree_root); - BUG_ON(ret); - - btrfs_btree_balance_dirty(tree_root, nr); - cond_resched(); - } - BUG_ON(ret); - - ret = btrfs_del_root(trans, tree_root, &root->root_key); - BUG_ON(ret); - - nr = trans->blocks_used; - ret = btrfs_end_transaction(trans, tree_root); - BUG_ON(ret); - - free_extent_buffer(root->node); - free_extent_buffer(root->commit_root); - kfree(root); - - btrfs_btree_balance_dirty(tree_root, nr); - return ret; -} -#endif - /* * new snapshots need to be created at a very specific time in the * transaction commit. This does the actual creation |