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btrfs: qgroup: Avoid calling btrfs_free_reserved_data_space in clear_bit_hook

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In clear_bit_hook, qgroup reserved data is already handled quite well,
either released by finish_ordered_io or invalidatepage.

So calling btrfs_qgroup_free_data() here is completely meaningless, and
since btrfs_qgroup_free_data() will lock io_tree, so it can't be called
with io_tree lock hold.

This patch will add a new function
btrfs_free_reserved_data_space_noquota() for clear_bit_hook() to cease
the lockdep warning.

Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: Chris Mason <clm@fb.com>
This commit is contained in:
Qu Wenruo 2015-10-08 18:19:37 +08:00 • committed by Chris Mason
parent 14524a846e
commit 51773bec7e
3 changed files with 22 additions and 12 deletions
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4
fs/btrfs/inode.c
View file

@ -1776,8 +1776,8 @@ static void btrfs_clear_bit_hook(struct inode *inode,
if (root->root_key.objectid != BTRFS_DATA_RELOC_TREE_OBJECTID
&& do_list && !(state->state & EXTENT_NORESERVE))
btrfs_free_reserved_data_space(inode, state->start,
len);
btrfs_free_reserved_data_space_noquota(inode,
state->start, len);
__percpu_counter_add(&root->fs_info->delalloc_bytes, -len,
root->fs_info->delalloc_batch);