UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

Btrfs: don't wait on uptodate buffers on read 

Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason 2007-04-03 11:43:19 -04:00 committed by David Woodhouse
parent 2da566edd8
commit 9d64272cd3
1 changed files with 3 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
fs/btrfs/disk-io.c
View File

@ -214,6 +214,8 @@ struct buffer_head *read_tree_block(struct btrfs_root *root, u64 blocknr)
bh = btrfs_find_create_tree_block(root, blocknr); bh = btrfs_find_create_tree_block(root, blocknr);
if (!bh) if (!bh)
return bh; return bh;
if (buffer_uptodate(bh))
goto uptodate;
lock_buffer(bh); lock_buffer(bh);
if (!buffer_uptodate(bh)) { if (!buffer_uptodate(bh)) {
get_bh(bh); get_bh(bh);
@ -226,6 +228,7 @@ struct buffer_head *read_tree_block(struct btrfs_root *root, u64 blocknr)
} else { } else {
unlock_buffer(bh); unlock_buffer(bh);
} }
uptodate:
if (check_tree_block(root, bh)) if (check_tree_block(root, bh))
BUG(); BUG();
return bh; return bh;