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

Btrfs: Add run time btree defrag, and an ioctl to force btree defrag

Browse Source 
This adds two types of btree defrag, a run time form that tries to
defrag recently allocated blocks in the btree when they are still in ram,
and an ioctl that forces defrag of all btree blocks.

File data blocks are not defragged yet, but this can make a huge difference
in sequential btree reads.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason
2007-08-07 16:15:09 -04:00
committed by David Woodhouse
parent 3c69faecb8
commit 6702ed490c
11 changed files with 566 additions and 102 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
fs/btrfs/ioctl.h
View File

@ -28,6 +28,6 @@ struct btrfs_ioctl_vol_args {
#define BTRFS_IOC_SNAP_CREATE _IOW(BTRFS_IOCTL_MAGIC, 1, \
struct btrfs_ioctl_vol_args)
#define BTRFS_IOC_ADD_DISK _IOW(BTRFS_IOCTL_MAGIC, 2, \
#define BTRFS_IOC_DEFRAG _IOW(BTRFS_IOCTL_MAGIC, 2, \
struct btrfs_ioctl_vol_args)
#endif