Thanks for your test.
At 02/02/2017 06:03 AM, Christoph Anton Mitterer wrote:
On Wed, 2017-02-01 at 09:06 +0800, Qu Wenruo wrote:
https://github.com/adam900710/btrfs-progs/tree/lowmem_fixes
Which is also rebased to latest v4.9.1.
Same game as last time, applied to 4.9, no RW mount between the runs.
btrfs-progs v4.9 WITHOUT patch:
*******************************
# btrfs check /dev/nbd0 ; echo $?
checking extents
137
=> would be nice if btrfs-progrs could give a message on why it failed,
i.e. "not enough memory" or so.
# btrfs check --mode=lowmem /dev/nbd0 ; echo $?
checking extents
ERROR: block group[74117545984 1073741824] used 1073741824 but extent items
used 0
ERROR: block group[239473786880 1073741824] used 1073741824 but extent items
used 1207959552
ERROR: block group[500393050112 1073741824] used 1073741824 but extent items
used 1207959552
ERROR: block group[581997428736 1073741824] used 1073741824 but extent items
used 0
ERROR: block group[626557714432 1073741824] used 1073741824 but extent items
used 0
ERROR: block group[668433645568 1073741824] used 1073741824 but extent items
used 0
ERROR: block group[948680261632 1073741824] used 1073741824 but extent items
used 0
ERROR: block group[982503129088 1073741824] used 1073741824 but extent items
used 0
ERROR: block group[1039411445760 1073741824] used 1073741824 but extent items
used 0
ERROR: block group[1054443831296 1073741824] used 1073741824 but extent items
used 1207959552
ERROR: block group[1190809042944 1073741824] used 1073741824 but extent items
used 0
ERROR: block group[1279392743424 1073741824] used 1073741824 but extent items
used 0
ERROR: block group[1481256206336 1073741824] used 1073741824 but extent items
used 0
ERROR: block group[1620842643456 1073741824] used 1073741824 but extent items
used 1207959552
ERROR: block group[1914511032320 1073741824] used 1073741824 but extent items
used 1207959552
ERROR: block group[3055361720320 1073741824] used 1073741824 but extent items
used 0
ERROR: block group[3216422993920 1073741824] used 1073741824 but extent items
used 0
ERROR: block group[3670615785472 1073741824] used 1073741824 but extent items
used 1207959552
ERROR: block group[3801612288000 1073741824] used 1073741824 but extent items
used 1207959552
ERROR: block group[3828455833600 1073741824] used 1073741824 but extent items
used 1207959552
ERROR: block group[4250973241344 1073741824] used 1073741824 but extent items
used 0
ERROR: block group[4261710659584 1073741824] used 1073741824 but extent items
used 1074266112
ERROR: block group[4392707162112 1073741824] used 1073741824 but extent items
used 0
ERROR: block group[4558063403008 1073741824] used 1073741824 but extent items
used 0
ERROR: block group[4607455526912 1073741824] used 1073741824 but extent items
used 0
ERROR: block group[4635372814336 1073741824] used 1073741824 but extent items
used 0
ERROR: block group[4640204652544 1073741824] used 1073741824 but extent items
used 0
ERROR: block group[4642352136192 1073741824] used 1073741824 but extent items
used 1207959552
ERROR: block group[4681006841856 1073741824] used 1073741824 but extent items
used 0
ERROR: block group[5063795802112 1073741824] used 1073741824 but extent items
used 0
ERROR: block group[5171169984512 1073741824] used 1073741824 but extent items
used 1207959552
ERROR: block group[5216267141120 1073741824] used 1073741824 but extent items
used 1207959552
ERROR: block group[5290355326976 1073741824] used 1073741824 but extent items
used 0
ERROR: block group[5445511020544 1073741824] used 1073741824 but extent items
used 1074266112
ERROR: block group[6084387405824 1073741824] used 1073741824 but extent items
used 0
ERROR: block group[6104788500480 1073741824] used 1073741824 but extent items
used 0
ERROR: block group[6878956355584 1073741824] used 1073741824 but extent items
used 0
ERROR: block group[6997067956224 1073741824] used 1073741824 but extent items
used 0
ERROR: block group[7702516334592 1073741824] used 1073741824 but extent items
used 0
ERROR: block group[8051482427392 1073741824] used 1073741824 but extent items
used 1084751872
ERROR: block group[8116980678656 1073741824] used 1073741824 but extent items
used 0
ERROR: errors found in extent allocation tree or chunk allocation
checking free space cache
checking fs roots
Checking filesystem on /dev/nbd0
UUID: 326d292d-f97b-43ca-b1e8-c722d3474719
found 7519512838144 bytes used err is -5
total csum bytes: 7330834320
total tree bytes: 10902437888
total fs tree bytes: 2019704832
total extent tree bytes: 1020149760
btree space waste bytes: 925714197
file data blocks allocated: 7509228494848
referenced 7630551511040
1
=> error still occurs *without* patch
=> increased VM memory here
# btrfs check /dev/nbd0 ; echo $?
checking extents
checking free space cache
checking fs roots
checking csums
checking root refs
Checking filesystem on /dev/nbd0
UUID: 326d292d-f97b-43ca-b1e8-c722d3474719
found 7519512838144 bytes used err is 0
total csum bytes: 7330834320
total tree bytes: 10902437888
total fs tree bytes: 2019704832
total extent tree bytes: 1020149760
btree space waste bytes: 925714197
file data blocks allocated: 7509228494848
referenced 7630551511040
0
=> same as before
btrfs-progs v4.9 WITH patches:
******************************
# btrfs check /dev/nbd0 ; echo $?
checking extents
checking free space
cache
checking fs roots
checking csums
checking root refs
Checking
filesystem on /dev/nbd0
UUID: 326d292d-f97b-43ca-b1e8-c722d3474719
found
7519512838144 bytes used, no error found
total csum bytes: 7330834320
tot
al tree bytes: 10902437888
total fs tree bytes: 2019704832
total extent
tree bytes: 1020149760
btree space waste bytes: 925714197
file data
blocks allocated: 7509228494848
referenced 7630551511040
0
=> same as
before
# btrfs check --mode=lowmem /dev/nbd0 ; echo $?
checking extents
checking free space cache
checking fs roots
ERROR: errors found in fs roots
Checking filesystem on /dev/nbd0
UUID: 326d292d-f97b-43ca-b1e8-c722d3474719
found 7519512838144 bytes used, error(s) found
total csum bytes: 7330834320
total tree bytes: 10902437888
total fs tree bytes: 2019704832
total extent tree bytes: 1020149760
btree space waste bytes: 925714197
file data blocks allocated: 7509228494848
referenced 7630551511040
1
=> Unfortunately :-(
That's embarrassing now.
At least the file extent bug is gone.
But still some new error is exposed, even without error message now.
I'll keep digging.
Thanks,
Qu
Cheers,
Chris.
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