Bug at extent-tree.c:3190

Bug at extent-tree.c:3190

[Jan Engelhardt]

Hi,



The following oops was obtained by doing some copying; it's tainted-P by 
nvidia but maybe it still gives some hints.
The testcase is basically

$ rsync -HPSav a/ b/

where by a/ is a collection of kernel trees, and b/ is a fresh btrfs.

$ ls -l a/
drwxr-xr-x 19 jengelh users 4096 Jan 10 07:32 linux17
drwxr-xr-x 19 jengelh users 4096 Jan 10 07:34 linux18
drwxr-xr-x 19 jengelh users 4096 Jan 10 07:34 linux19
drwxr-xr-x 19 jengelh users 4096 Jan 10 07:34 linux20
drwxr-xr-x 19 jengelh users 4096 Jan 10 07:35 linux21
drwxr-xr-x 19 jengelh users 4096 Jan 10 07:35 linux22
drwxr-xr-x 19 jengelh users 4096 Jan 10 07:35 linux23
drwxr-xr-x 20 jengelh users 4096 Jan 10 07:35 linux24
drwxr-xr-x 21 jengelh users 4096 Jan 10 07:36 linux25
drwxr-xr-x 21 jengelh users 4096 Jan 10 07:36 linux26
drwxr-xr-x 22 jengelh users 4096 Jan 10 07:37 linux27
drwxr-xr-x 22 jengelh users 4096 Jan 10 07:37 linux28



btrfs searching for 98304 bytes, num_bytes 98304, loop 2, allowed_alloc 1
btrfs searching for 49152 bytes, num_bytes 49152, loop 2, allowed_alloc 1
btrfs searching for 24576 bytes, num_bytes 24576, loop 2, allowed_alloc 1
btrfs searching for 12288 bytes, num_bytes 12288, loop 2, allowed_alloc 1
btrfs searching for 45056 bytes, num_bytes 45056, loop 2, allowed_alloc 1
btrfs searching for 20480 bytes, num_bytes 20480, loop 2, allowed_alloc 1
btrfs searching for 8192 bytes, num_bytes 8192, loop 2, allowed_alloc 1
btrfs searching for 4096 bytes, num_bytes 4096, loop 2, allowed_alloc 1
btrfs allocation failed flags 1, wanted 4096
space_info has 0 free, is full
block group 12582912 has 8388608 bytes, 8388608 used 0 pinned 0 reserved
0 blocks of free space at or bigger than bytes is
block group 244056064 has 429457408 bytes, 429457408 used 0 pinned 0 reserved
0 blocks of free space at or bigger than bytes is
block group 673513472 has 429457408 bytes, 429457408 used 0 pinned 0 reserved
0 blocks of free space at or bigger than bytes is
block group 1102970880 has 429457408 bytes, 429457408 used 0 pinned 0 reserved
0 blocks of free space at or bigger than bytes is
block group 1747124224 has 429457408 bytes, 429457408 used 0 pinned 0 reserved
0 blocks of free space at or bigger than bytes is
block group 2176581632 has 429457408 bytes, 429457408 used 0 pinned 0 reserved
0 blocks of free space at or bigger than bytes is
block group 2606039040 has 429457408 bytes, 429457408 used 0 pinned 0 reserved
0 blocks of free space at or bigger than bytes is
block group 3250192384 has 392298496 bytes, 392208384 used 0 pinned 90112 reserved
0 blocks of free space at or bigger than bytes is
------------[ cut here ]------------
kernel BUG at fs/btrfs/extent-tree.c:3190!
invalid opcode: 0000 [#1] PREEMPT SMP 
last sysfs file: /sys/devices/pci0000:00/0000:00:0d.0/modalias
Modules linked in: btrfs zlib_deflate crc32c libcrc32c snd_cs46xx af_packet snd_pcm_oss snd_mixer_oss nfs lockd nfs_acl auth_rpcgss sunrpc ip6t_REJECT ip6table_filter ip6_tables ipv6 xt_quota2 xt_dscp xt_connmark xt_CONNMARK iptable_mangle xt_MASQUERADE xt_mark iptable_nat nf_nat xt_DELUDE xt_TARPIT ipt_REJECT xt_CHAOS compat_xtables xt_condition xt_tcpudp nf_conntrack_ipv4 nf_defrag_ipv4 xt_multiport xt_conntrack nf_conntrack iptable_filter iptable_raw ip_tables x_tables fuse sha256_generic cbc dm_crypt nls_iso8859_1 nls_cp437 vfat fat loop aes_i586 aes_generic dm_mod gameport snd_rawmidi snd_seq_device snd_ac97_codec ac97_bus nvidia(P) snd_pcm ppdev snd_timer processor snd thermal_sys rtc_cmos rtc_core sis_agp soundcore hwmon 8139too sis900 rtc_lib sr_mod i2c_core agpgart pci_hotplug pcs
 pkr parport mii snd_page_alloc cdrom sg usbhid hid ehci_hcd ohci_hcd usbcore sd_mod crc_t10dif xfs exportfs pata_sis libata scsi_mod [last unloaded: vmnet]

Pid: 8223, comm: pdflush Tainted: P           (2.6.29-rc6-jen75-rt #1) L7S7A2
EIP: 0060:[<f10938ea>] EFLAGS: 00010246 CPU: 0
EIP is at __btrfs_reserve_extent+0x266/0x277 [btrfs]
EAX: eefdce90 EBX: d87739c0 ECX: d8773a24 EDX: eefdce90
ESI: c88b7000 EDI: c09b2000 EBP: c2085b94 ESP: c2085b5c
 DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 preempt:00000001
Process pdflush (pid: 8223, ti=c2084000 task=eefdce90 task.ti=c2084000)
Stack:
 f10c8b88 00000001 00000000 00001000 00000000 00000000 00000000 00001000
 d0409350 00000001 00000000 c2085c5b ffffffff c88b7000 c2085bdc f1093930
 00001000 00000000 00001000 00000000 00000000 00000000 d91c0000 00000000
Call Trace:
 [<f1093930>] ? btrfs_reserve_extent+0x35/0x58 [btrfs]
 [<f10a541a>] ? cow_file_range+0x1fa/0x3b5 [btrfs]
 [<f10a5cdf>] ? cow_file_range_async+0x53/0x2be [btrfs]
 [<f10b5f2b>] ? test_range_bit+0x120/0x12a [btrfs]
 [<f10b92bc>] ? find_lock_delalloc_range+0x153/0x1ba [btrfs]
 [<f10a5f9a>] ? run_delalloc_range+0x50/0x5b [btrfs]
 [<f10b9bd8>] ? __extent_writepage+0x232/0x8c9 [btrfs]
 [<c0219c19>] ? radix_tree_gang_lookup_tag_slot+0x76/0x95
 [<c0172373>] ? find_get_pages_tag+0xa6/0xd8
 [<c01272b1>] ? wake_up_process+0x11/0x13
 [<f10b6fc0>] ? extent_write_cache_pages+0x106/0x1ee [btrfs]
 [<f10a3911>] ? btrfs_writepages+0x0/0x1f [btrfs]
 [<f10b70d9>] ? extent_writepages+0x31/0x53 [btrfs]
 [<f10b99a6>] ? __extent_writepage+0x0/0x8c9 [btrfs]
 [<f10b5721>] ? flush_write_bio+0x0/0x26 [btrfs]
 [<f10a3a3b>] ? btrfs_get_extent+0x0/0x853 [btrfs]
 [<f10a392b>] ? btrfs_writepages+0x1a/0x1f [btrfs]
 [<c017814c>] ? do_writepages+0x23/0x34
 [<c01ae0c2>] ? __sync_single_inode+0x57/0x1fe
 [<c01ae38a>] ? __writeback_single_inode+0x121/0x129
 [<f109ce96>] ? btrfs_congested_fn+0x21/0x61 [btrfs]
 [<c01ae76d>] ? generic_sync_sb_inodes+0x247/0x3b8
 [<c01aea6f>] ? writeback_inodes+0x6e/0xb5
 [<c0178779>] ? background_writeout+0x79/0xa5
 [<c0178f82>] ? __pdflush+0xe5/0x181
 [<c017901e>] ? pdflush+0x0/0x42
 [<c0179057>] ? pdflush+0x39/0x42
 [<c0178700>] ? background_writeout+0x0/0xa5
 [<c013c9f7>] ? kthread+0x3b/0x61
 [<c013c9bc>] ? kthread+0x0/0x61
 [<c0103ff7>] ? kernel_thread_helper+0x7/0x10
Code: 43 38 39 c2 75 dd 31 db ff 75 0c ff 75 08 ff 75 f0 ff 75 ec 68 88 8b 0c f1 e8 80 59 29 cf 8b 55 08 89 d8 8b 4d 0c e8 b8 fc ff ff <0f> 0b 83 c4 14 eb fe 8d 65 f4 31 c0 5b 5e 5f 5d c3 55 89 e5 57 
EIP: [<f10938ea>] __btrfs_reserve_extent+0x266/0x277 [btrfs] SS:ESP 0068:c2085b5c
---[ end trace 486dcf52905c5ff8 ]---

Re: Bug at extent-tree.c:3190

[Josef Bacik]

On Tue, Mar 03, 2009 at 04:09:38AM +0100, Jan Engelhardt wrote:
> Hi,
> 
> 
> 
> The following oops was obtained by doing some copying; it's tainted-P by 
> nvidia but maybe it still gives some hints.
> The testcase is basically
> 
> $ rsync -HPSav a/ b/
> 
> where by a/ is a collection of kernel trees, and b/ is a fresh btrfs.
> 
> $ ls -l a/
> drwxr-xr-x 19 jengelh users 4096 Jan 10 07:32 linux17
> drwxr-xr-x 19 jengelh users 4096 Jan 10 07:34 linux18
> drwxr-xr-x 19 jengelh users 4096 Jan 10 07:34 linux19
> drwxr-xr-x 19 jengelh users 4096 Jan 10 07:34 linux20
> drwxr-xr-x 19 jengelh users 4096 Jan 10 07:35 linux21
> drwxr-xr-x 19 jengelh users 4096 Jan 10 07:35 linux22
> drwxr-xr-x 19 jengelh users 4096 Jan 10 07:35 linux23
> drwxr-xr-x 20 jengelh users 4096 Jan 10 07:35 linux24
> drwxr-xr-x 21 jengelh users 4096 Jan 10 07:36 linux25
> drwxr-xr-x 21 jengelh users 4096 Jan 10 07:36 linux26
> drwxr-xr-x 22 jengelh users 4096 Jan 10 07:37 linux27
> drwxr-xr-x 22 jengelh users 4096 Jan 10 07:37 linux28
> 
>

ENOSPC, sorry :)

Josef 

Re: Bug at extent-tree.c:3190

[Jan Engelhardt]

On Tuesday 2009-03-03 16:40, Josef Bacik wrote:
>> 
>> The following oops was obtained by doing some copying; it's tainted-P by 
>> nvidia but maybe it still gives some hints.
>> The testcase is basically
>> 
>> $ rsync -HPSav a/ b/
>> 
>> where by a/ is a collection of kernel trees, and b/ is a fresh btrfs.
>> 
>> $ ls -l a/
>> drwxr-xr-x 19 jengelh users 4096 Jan 10 07:32 linux17
>> drwxr-xr-x 19 jengelh users 4096 Jan 10 07:34 linux18
>> drwxr-xr-x 19 jengelh users 4096 Jan 10 07:34 linux19
>> drwxr-xr-x 19 jengelh users 4096 Jan 10 07:34 linux20
>> drwxr-xr-x 19 jengelh users 4096 Jan 10 07:35 linux21
>> drwxr-xr-x 19 jengelh users 4096 Jan 10 07:35 linux22
>> drwxr-xr-x 19 jengelh users 4096 Jan 10 07:35 linux23
>> drwxr-xr-x 20 jengelh users 4096 Jan 10 07:35 linux24
>> drwxr-xr-x 21 jengelh users 4096 Jan 10 07:36 linux25
>> drwxr-xr-x 21 jengelh users 4096 Jan 10 07:36 linux26
>> drwxr-xr-x 22 jengelh users 4096 Jan 10 07:37 linux27
>> drwxr-xr-x 22 jengelh users 4096 Jan 10 07:37 linux28
>
>ENOSPC, sorry :)

Ah heh, could be a cause. Even so, there is still "plenty" of
space (loop1 with btrfs is also 4184064K in size):

Filesystem    Type   1K-blocks      Used Available Use% Mounted on
/dev/loop0     xfs     4184064   3676644    507420  88% /lo/kernel

Re: Bug at extent-tree.c:3190

[Josef Bacik]

On Tue, Mar 03, 2009 at 05:11:06PM +0100, Jan Engelhardt wrote:
> 
> On Tuesday 2009-03-03 16:40, Josef Bacik wrote:
> >> 
> >> The following oops was obtained by doing some copying; it's tainted-P by 
> >> nvidia but maybe it still gives some hints.
> >> The testcase is basically
> >> 
> >> $ rsync -HPSav a/ b/
> >> 
> >> where by a/ is a collection of kernel trees, and b/ is a fresh btrfs.
> >> 
> >> $ ls -l a/
> >> drwxr-xr-x 19 jengelh users 4096 Jan 10 07:32 linux17
> >> drwxr-xr-x 19 jengelh users 4096 Jan 10 07:34 linux18
> >> drwxr-xr-x 19 jengelh users 4096 Jan 10 07:34 linux19
> >> drwxr-xr-x 19 jengelh users 4096 Jan 10 07:34 linux20
> >> drwxr-xr-x 19 jengelh users 4096 Jan 10 07:35 linux21
> >> drwxr-xr-x 19 jengelh users 4096 Jan 10 07:35 linux22
> >> drwxr-xr-x 19 jengelh users 4096 Jan 10 07:35 linux23
> >> drwxr-xr-x 20 jengelh users 4096 Jan 10 07:35 linux24
> >> drwxr-xr-x 21 jengelh users 4096 Jan 10 07:36 linux25
> >> drwxr-xr-x 21 jengelh users 4096 Jan 10 07:36 linux26
> >> drwxr-xr-x 22 jengelh users 4096 Jan 10 07:37 linux27
> >> drwxr-xr-x 22 jengelh users 4096 Jan 10 07:37 linux28
> >
> >ENOSPC, sorry :)
> 
> Ah heh, could be a cause. Even so, there is still "plenty" of
> space (loop1 with btrfs is also 4184064K in size):
> 
> Filesystem    Type   1K-blocks      Used Available Use% Mounted on
> /dev/loop0     xfs     4184064   3676644    507420  88% /lo/kernel

Yeah you ran out of data area, the rest of the space is reserved for metadata
space.  If you use the current git tree with my enospc patch this problem
shouldnt happen (as easily anyway).  Thanks,

Josef