lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Btrfs: improve the noflush reservation

Browse Source 
In some places(such as: evicting inode), we just can not flush the reserved
space of delalloc, flushing the delayed directory index and delayed inode
is OK, but we don't try to flush those things and just go back when there is
no enough space to be reserved. This patch fixes this problem.

We defined 3 types of the flush operations: NO_FLUSH, FLUSH_LIMIT and FLUSH_ALL.
If we can in the transaction, we should not flush anything, or the deadlock
would happen, so use NO_FLUSH. If we flushing the reserved space of delalloc
would cause deadlock, use FLUSH_LIMIT. In the other cases, FLUSH_ALL is used,
and we will flush all things.

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
This commit is contained in:
Miao Xie
2012-10-16 11:33:38 +00:00
committed by Josef Bacik
parent 561c294d4c
commit 08e007d2e5
8 changed files with 97 additions and 86 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
fs/btrfs/inode-map.c
View File

@ -434,8 +434,9 @@ int btrfs_save_ino_cache(struct btrfs_root *root,
* 3 items for pre-allocation
*/
trans->bytes_reserved = btrfs_calc_trans_metadata_size(root, 8);
ret = btrfs_block_rsv_add_noflush(root, trans->block_rsv,
trans->bytes_reserved);
ret = btrfs_block_rsv_add(root, trans->block_rsv,
trans->bytes_reserved,
BTRFS_RESERVE_NO_FLUSH);
if (ret)
goto out;
trace_btrfs_space_reservation(root->fs_info, "ino_cache",