Comment # 1
on bug 906684
from Nicholas Steeves
I confirmed this bug because my trace also began with:
kernel BUG at ../fs/btrfs/extent_io.c:2875!
This is on a fresh openSUSE 12.3 installed on a Thinkpad x220 in UEFI mode
about a week ago. I ran into the bug today, as I was multi-tasking with ~2GB
of used memory and ~6GB free. Amarok keep hanging when it tried to play a file
I had copied to my hard drive from my user-data backup. I switched to a
konsole, and decided to poke the offending file with:
echo "" > file.flac
The command hung, so I ran dmesg, and started a btrfs scrub. The scrub
complete without any errors. I am going to run another one after I reboot, but
don't expect it to find anything. The smartctl log is good, and I recently ran
memtest86+ overnight, which was also 100% good. I'm not sure if it's relevant,
but I have an Intel 320 SSD. Finally, scrolling and keyboard input began to
have about one second of lag around this event, and has continued ever since,
so I really hope we're not losing debug info by me rebooting, but I need to get
work done.
[44059.767377] ------------[ cut here ]------------
[44059.767402] kernel BUG at ../fs/btrfs/extent_io.c:2875!
[44059.767420] invalid opcode: 0000 [#1] PREEMPT SMP
[44059.767444] Modules linked in: binfmt_misc st sr_mod cdrom uas usb_storage
fuse rfcomm joydev serio_raw ctr ccm af_packet bnep nls_iso8859_1 nls_cp437
snd_hda_codec_hdmi vfat fat snd_hda_codec_conexant snd_hda_codec_generic
snd_hda_intel snd_hda_controller snd_hda_codec snd_hwdep snd_pcm iTCO_wdt
iTCO_vendor_support arc4 iwldvm mac80211 x86_pkg_temp_thermal intel_powerclamp
coretemp kvm_intel kvm snd_timer crct10dif_pclmul uvcvideo videobuf2_vmalloc
videobuf2_memops videobuf2_core v4l2_common thinkpad_acpi videodev crc32_pclmul
ghash_clmulni_intel ecb aesni_intel aes_x86_64 lrw gf128mul glue_helper
ablk_helper cryptd pcspkr btusb iwlwifi bluetooth sdhci_pci sdhci 6lowpan_iphc
cfg80211 mmc_core snd thermal wmi ac rfkill battery tpm_tis tpm e1000e ptp
pps_core soundcore lpc_ich mfd_core shpchp mei_me
[44059.767989] mei i2c_i801 processor dm_mod efivarfs btrfs xor raid6_pq
crc32c_intel i915 i2c_algo_bit drm_kms_helper drm video button sg
[44059.768087] CPU: 1 PID: 25732 Comm: flacparse0:sink Not tainted
3.16.6-2-desktop #1
[44059.768133] Hardware name: LENOVO 42875TU/42875TU, BIOS 8DET69WW (1.39 )
07/18/2013
[44059.768179] task: ffff8801528c6050 ti: ffff880152758000 task.ti:
ffff880152758000
[44059.768225] RIP: 0010:[<ffffffffa0233068>] [<ffffffffa0233068>]
__do_readpage+0x7c8/0x7d0 [btrfs]
[44059.768298] RSP: 0018:ffff88015275ba58 EFLAGS: 00010206
[44059.768332] RAX: 0000000000000000 RBX: 0000000000001000 RCX:
000000000000001c
[44059.768374] RDX: 0000000000000000 RSI: ffff880206a5af50 RDI:
ffff8800bba555c0
[44059.768417] RBP: ffff88015275bc18 R08: ffff8800bba555c0 R09:
0000000000080000
[44059.768460] R10: ffff88008c2de000 R11: 0000000000000002 R12:
ffff88015275bc18
[44059.768504] R13: ffff88015275bc18 R14: 0000000000000000 R15:
0000000000080000
[44059.768541] FS: 00007fadc10bc700(0000) GS:ffff88021e240000(0000)
knlGS:0000000000000000
[44059.768571] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[44059.768601] CR2: 00007fad18003228 CR3: 000000015c6bf000 CR4:
00000000000407e0
[44059.768642] Stack:
[44059.768656] ffff880212ca1700 ffff88015275bc08 ffffffffa0233760
ffff880000000000
[44059.768705] 0000000000000000 0000000000000000 0000000000080fff
ffff880159d90088
[44059.768756] 0000000000000000 ffffea0002d2ea70 0000000000001000
ffff880212ca1700
[44059.768808] Call Trace:
[44059.768917] [<ffffffffa0233412>]
__extent_readpages.constprop.42+0x2d2/0x2f0 [btrfs]
[44059.769044] [<ffffffffa02346f5>] extent_readpages+0x155/0x1a0 [btrfs]
[44059.769134] [<ffffffff8115613b>] __do_page_cache_readahead+0x1ab/0x230
[44059.769174] [<ffffffff81156309>] ondemand_readahead+0x149/0x2a0
[44059.769213] [<ffffffff8114be61>] generic_file_read_iter+0x361/0x5d0
[44059.769253] [<ffffffff811b7011>] new_sync_read+0x71/0xa0
[44059.769290] [<ffffffff811b7673>] vfs_read+0x93/0x170
[44059.769323] [<ffffffff811b82a2>] SyS_read+0x42/0xa0
[44059.769356] [<ffffffff8162182d>] system_call_fastpath+0x1a/0x1f
[44059.769401] [<00007fae768fe49d>] 0x7fae768fe49c
[44059.769430] Code: e8 ae db ff ff e9 e2 fd ff ff e8 14 9f dd e0 e9 08 f9 ff
ff bb 00 10 00 00 31 f6 c7 84 24 b4 00 00 00 00 00 00 00 e9 6b fe ff ff <0f> 0b
0f 0b 0f 0b 0f 0b 66 66 66 66 90 41 57 49 89 f7 41 56 41
[44059.769644] RIP [<ffffffffa0233068>] __do_readpage+0x7c8/0x7d0 [btrfs]
[44059.771188] RSP <ffff88015275ba58>
[44059.777081] ---[ end trace 5a37c49d2b3fda65 ]---