cheater00 . wrote on 2016/01/15 03:25 +0100:
Hi guys,
I have a particularly full btrfs (nearly all of 6TB used on a disk).
This is different than the fs I've experienced the resize bug on
recently.
btrfs check crashes on it:
# btrfs check /dev/sdb1
Checking filesystem on /dev/sdb1
UUID: 95db96b3-96fe-4a12-810c-27c1dbd30b0d
checking extents
extent_io.c:543: __alloc_extent_buffer: Assertion failed.
This means memory allocation failed.
And considering the size of FS, and how btrfsck caches metadata (btrfsck
will cache all extent info during extent tree check),
it just mean your memory is not big enough to cache them all.
It's already an known problem.
Workaround is to increase your swap size until btrfsck can continue
without segfault.
Thanks,
Qu
btrfs[0x80558a3]
btrfs[0x8092971]
btrfs(alloc_extent_buffer+0xb7)[0x8093494]
btrfs(btrfs_find_create_tree_block+0x2b)[0x8083785]
btrfs(read_tree_block+0x32)[0x808503f]
btrfs(read_node_slot+0x63)[0x807f430]
btrfs(btrfs_search_slot+0xb47)[0x8081a28]
btrfs(btrfs_lookup_extent_info+0xd6)[0x808a0df]
btrfs[0x806c13a]
btrfs[0x806d95e]
btrfs[0x806e5cb]
btrfs(cmd_check+0x10f8)[0x8070fee]
btrfs(main+0x14d)[0x8055acb]
/lib/i386-linux-gnu/libc.so.6(__libc_start_main+0xf3)[0xb74f0a83]
btrfs[0x8055af8]
$ uname -a
Linux SX20S 4.4.0-040400-generic #201601101930 SMP Mon Jan 11 00:49:33
UTC 2016 i686 i686 i686 GNU/Linux
$ btrfs --version
btrfs-progs v4.3
# btrfs fi show /dev/sdb1
Label: 'A' uuid: 95db96b3-96fe-4a12-810c-27c1dbd30b0d
Total devices 1 FS bytes used 5.41TiB
devid 1 size 5.46TiB used 5.46TiB path /dev/sdb1
# btrfs-show-super /dev/sdb1
superblock: bytenr=65536, device=/dev/sdb1
---------------------------------------------------------
csum 0x116b97f0 [match]
bytenr 65536
flags 0x1
( WRITTEN )
magic _BHRfS_M [match]
fsid 95db96b3-96fe-4a12-810c-27c1dbd30b0d
label P
generation 128737
root 43384832
sys_array_size 226
chunk_root_generation 106809
root_level 1
chunk_root 20971520
chunk_root_level 1
log_root 0
log_root_transid 0
log_root_level 0
total_bytes 6001173463040
bytes_used 5948325072896
sectorsize 4096
nodesize 16384
leafsize 16384
stripesize 4096
root_dir 6
num_devices 1
compat_flags 0x0
compat_ro_flags 0x0
incompat_flags 0x61
( MIXED_BACKREF |
BIG_METADATA |
EXTENDED_IREF )
csum_type 0
csum_size 4
cache_generation 128737
uuid_tree_generation 128737
dev_item.uuid e2a8e731-b28c-437b-8cb9-583bb96aea5f
dev_item.fsid 95db96b3-96fe-4a12-810c-27c1dbd30b0d [match]
dev_item.type 0
dev_item.total_bytes 6001173463040
dev_item.bytes_used 6001173463040
dev_item.io_align 4096
dev_item.io_width 4096
dev_item.sector_size 4096
dev_item.devid 1
dev_item.dev_group 0
dev_item.seek_speed 0
dev_item.bandwidth 0
dev_item.generation 0
# btrfs fi usage A
Overall:
Device size: 5.46TiB
Device allocated: 5.46TiB
Device unallocated: 0.00B
Device missing: 0.00B
Used: 5.42TiB
Free (estimated): 35.41GiB (min: 35.41GiB)
Data ratio: 1.00
Metadata ratio: 2.00
Global reserve: 512.00MiB (used: 0.00B)
Data,single: Size:5.43TiB, Used:5.40TiB
/dev/sdb1 5.43TiB
Metadata,single: Size:8.00MiB, Used:0.00B
/dev/sdb1 8.00MiB
Metadata,DUP: Size:12.50GiB, Used:11.22GiB
/dev/sdb1 25.00GiB
System,single: Size:4.00MiB, Used:0.00B
/dev/sdb1 4.00MiB
System,DUP: Size:8.00MiB, Used:608.00KiB
/dev/sdb1 16.00MiB
Unallocated:
/dev/sdb1 0.00B
dmesg is showing a lot of stuff like this, but it only started doing
this when I upgraded to linux 4.4, whereas before on 4.3 this didn't
happen:
[56319.486446] BTRFS critical (device sdb1): entry offset
6102519574528, bytes 20480, bitmap no
[56319.486447] BTRFS critical (device sdb1): entry offset
6102527688704, bytes 24576, bitmap no
[56319.486448] BTRFS critical (device sdb1): entry offset
6102528040960, bytes 8192, bitmap no
[56319.486450] BTRFS critical (device sdb1): entry offset
6102536241152, bytes 8192, bitmap no
[56319.486451] BTRFS critical (device sdb1): entry offset
6102561120256, bytes 8192, bitmap no
[56319.486452] BTRFS critical (device sdb1): entry offset
6102590480384, bytes 4096, bitmap no
[56319.486453] BTRFS critical (device sdb1): entry offset
6102620999680, bytes 12288, bitmap no
[56319.486454] BTRFS critical (device sdb1): entry offset
6102633365504, bytes 16384, bitmap no
[56319.486455] BTRFS info (device sdb1): block group has cluster?: no
[56319.486456] BTRFS info (device sdb1): 1 blocks of free space at or
bigger than bytes is
--
To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
--
To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
