https://bugzilla.kernel.org/show_bug.cgi?id=43013
--- Comment #9 from ITec <itec@xxxxxxxxxxxxxxxxxxx> 2012-03-30 15:52:17 ---
The same test under 3.1.10:
# xfs_fsr -v /dev/sda3
/ start inode=0
ino=20294080
ino=20294080 already fully defragmented.
# df -m /tmp
Filesystem 1M-blocks Used Available Use% Mounted on
/dev/sda3 15248 2553 12696 17% /
# dd if=/dev/zero of=/tmp/zero1.tmp bs=1024 count=9000000; echo syncing; time
sync
9000000+0 records in
9000000+0 records out
9216000000 bytes (9,2 GB) copied, 91,3123 s, 101 MB/s
syncing
real 0m3.029s
user 0m0.004s
sys 0m0.000s
# xfs_bmap /tmp/zero*
/tmp/zero1.tmp:
0: [0..4194303]: 26708152..30902455
1: [4194304..8388607]: 11237112..15431415
2: [8388608..12076735]: 4123968..7812095
3: [12076736..15671151]: 19841872..23436287
4: [15671152..16201615]: 18355464..18885927
5: [16201616..16547543]: 30902456..31248383
6: [16547544..16777215]: 3523816..3753487
7: [16777216..17113183]: 10532744..10868711
8: [17113184..17139023]: 10011920..10037759
9: [17139024..17399103]: 18960144..19220223
10: [17399104..17569775]: 15431416..15602087
11: [17569776..17633927]: 18886432..18950583
12: [17633928..17715311]: 19264640..19346023
13: [17715312..17785367]: 26181368..26251423
14: [17785368..17854791]: 26399192..26468615
15: [17854792..17923999]: 25742880..25812087
16: [17924000..17988511]: 3155768..3220279
17: [17988512..17999999]: 3223528..3235015
# df -m /tmp
Filesystem 1M-blocks Used Available Use% Mounted on
/dev/sda3 15248 11343 3906 75% /
Now creation of a single 9GB file takes a bit more than 90s.
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