Using bcache with a 512GB SSD as cache, 4TB HDD as backing, doing a backup of the bcache device sometimes results in a kernel crash. Below is an OCR of the crash log.
lo no wireless extensions.
Lsusb:
Bus 001 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 003: ID 0557:2220 ATEN International Co., Ltd
MachineType: Dell Inc. OptiPlex 980
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-44-generic root=UUID=63c581a7-3055-4192-88c2-af192e84130d ro quiet splash crashkernel=384M-:128M vt.handoff=7
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
RfKill:
SourcePackage: linux
UpgradeStatus: Upgraded to trusty on 2014-12-24 (23 days ago)
WifiSyslog:
dmi.bios.date: 01/21/2011
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A07
dmi.board.name: 0D441T
dmi.board.vendor: Dell Inc.
dmi.board.version: A03
dmi.chassis.type: 6
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA07:bd01/21/2011:svnDellInc.:pnOptiPlex980:pvr:rvnDellInc.:rn0D441T:rvrA03:cvnDellInc.:ct6:cvr:
dmi.product.name: OptiPlex 980
dmi.sys.vendor: Dell Inc.
Using bcache with a 512GB SSD as cache, 4TB HDD as backing, doing a backup of the bcache device sometimes results in a kernel crash. Below is an OCR of the crash log.
lsb_release -rd
Description: Ubuntu 14.04.1 LTS
Release: 14.04
Linux goliad 3.13.0-44-generic #73-Ubuntu SMP Tue Dec 16 00:22:43 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
I have a picture of the screen as well if needed.
[127032.260022] R13: 0000000000000002 R14: ffff8800d5e27ff0 R15: ffff8800d5e28000 0(0000) GS:ffff88021fc8 0000(0000) knlGS:000000000 0000000 f51>] wq_worker_ sleeping+ 0x11/0x90 f39>] __schedule+ 0x589/0x7d0 1a9>] schedule+0x29/0x70 15f>] do_exit+0x6df/0xa50 329>] oops_end+0xa9/0x150 96d>] no_context+ 0x27e/0x28b 9ed>] __bad_area_ nose,aphore+ 0x73/0x1ca b57>] bad_area_ nosemaphore+ 0x13/0x15 cf7>] __do_page_ fault+0xa7/ 0x560 793>] ? alloc_pages_ current+ 0xa3/0x160 Bfe>] ? __get_free_ pages+0xe/ 0x50 83e>] ? kmalloc_ order_trace+ 0x2e/0xa0 1ca>] do_page_ fault+0x1a/ 0x70 941>] ? __kmalloc+ 0x211/0x230 628>] page_fault+ 0xZ8/0x30 976>] ? bch_htree_ node_read+ 0x176/0x550 [bcache1 f45>] bch_btree_ node_get+ 0x165/0x290 [bcache] 108>] bch_btree_ map_nodes_ recurse+ 0x98/0x140 [bcache] b90>] ? bch_btree_ insert_ check_key+ 0x190/0x190 [bcache] 947>] ? mempool_ free_slab+ 0x17/0x20 bb9>] ? mempool_ free+0x49/ 0x90 3c9>] __bch_btree_ map_nodes+ 0x139/0x1c0 [bcache] b90>] ? bch_btree_ insert_ check_key+ 0x190/0x190 [bcache] bb9>] ? mempool_ free+0x49/ 0x90 504>] bch_btree_ insert+ 0xb4/0x120 [bcache] 7ba>] bch_data_ insert_ keys+0x3a/ 0x160 [bcache] a52>] process_ one_work+ 0x182/0x450 841>] worker_ thread+ 0x121/0x410 720>] ? rescuer_ thread+ 0x430/0x430 572>] kthread+0xd2/0xf0 4a0>] ? kthread_ create_ on_node+ 0x1c0/0x1c0 7bc>] ret_from_ fork+0x7c/ 0xb0 4a0>] ? kthread_ create_ on_node+ 0xlc0/0xlc0 c10>] kthread_ data+0x10/ 0x20
[127032.260952] FS: 000000000000000
[127032.261880] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[127032.262813] CR2: 0000000000000028 CR3: 000000021ec0e000 CR4: 00000000000007e0
[127032.263755] Stack:
[127032.264683] ffff8800d724f830 ffffffff81084f51 ffffBB00d5e28000 ffff8800d724f890
[127032.265629] ffffffff81724f39 ffff8800d5e28000 ffff8800d724ffd8 0000000000013480
[127032.266577] 0000000000013480 ffff8800d5e28000 ffffBB00d5e28650 ffff8800d5e27ff0
[127032.267523] Call Trace:
[127032.268453] [<ffffffff81084
[127032.269386] [<ffffffff81724
[127032.270323] [<ffffffff81725
[127032.271260] [<ffffffff8106a
[127032.272194] [<ffffffffB172a
[127032.273115] [<ffffffff81719
[127032.274038] [<ffffffff81719
[127032.274960] [<ffffffff81719
[127032.275878] [<ffffffff8172c
[127032.276791] [<ffffffff81197
[127032.277708] [<ffffffff81153
[127032.278630] [<ffffffff81170
[127032.279553] [<ffffffff8172d
[127032.280474] [<ffffffff811a2
[127032.281390] [<ffffffff81729
[127032.282275] [<ffffffffa009a
[127032.283108] [<ffffffffa009b
[127032.283933] [<ffffffffa009c
[127032.284760] [<ffffffffa009e
[127032.285593] [<ffffffff81151
[127032.286418] [<ffffffff81151
[127032.287233] [<ffffffffa009f
[127032.288053] [<ffffffffa009e
[127032.288873] [<ffffffff81151
[127032.289678] [<ffffffffa009f
[127032.290476] [<ffffffffa00a9
[127032.291258] [<ffffffff81083
[127032.292029] [<ffffffff81084
[127032.292786] [<ffffffffB1e84
[127032.293523] [<ffffffff8108b
[127032.294246] [<ffffffff8108b
[127032.294961] [<ffffffff81731
[127032.295672] [<ffffffff8108b
[127032.296374] Code: 00 48 89 e5 5d 48 8b 40 c8 48 c1 e8 02 83 e0 01 c3 66 2e 0f 1f 84 00 00 00 00 00 66 66 66 66 90 48 8b 87 c0 03 00 00 55 48 89 e5 <48> 8b 40 d8 5d c3 66 2e 0f 1f 84 00 00 00 00 00 66 66 66 66 90
[127032.298061] RIP [<ffffffff8108b
[127032.298853] RSP <ffff8800d724f818>
[127032.299630] CR2: ffffffffffffffd8
ProblemType: Bug 3.13.0- 44-generic 3.13.0-44.73 ature: Ubuntu 3.13.0- 44.73-generic 3.13.11-ckt12 controlC0' , '/dev/snd/hwC0D0', '/dev/snd/hwC0D3', '/dev/snd/ pcmC0D0c' , '/dev/snd/ pcmC0D0p' , '/dev/snd/ pcmC0D3p' , '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
DistroRelease: Ubuntu 14.04
Package: linux-image-
ProcVersionSign
Uname: Linux 3.13.0-44-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.6
Architecture: amd64
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/dsp', '/dev/snd/by-path', '/dev/snd/
CurrentDmesg: Error: command ['sh', '-c', 'dmesg | comm -13 --nocheck-order /var/log/dmesg -'] failed with exit code 1: comm: /var/log/dmesg: Permission denied
Date: Fri Jan 16 10:04:07 2015
InstallationDate: Installed on 2011-08-25 (1240 days ago)
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
IwConfig:
eth0 no wireless extensions.
lo no wireless extensions. /boot/vmlinuz- 3.13.0- 44-generic root=UUID= 63c581a7- 3055-4192- 88c2-af192e8413 0d ro quiet splash crashkernel= 384M-:128M vt.handoff=7
Lsusb:
Bus 001 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 003: ID 0557:2220 ATEN International Co., Ltd
MachineType: Dell Inc. OptiPlex 980
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
RfKill:
SourcePackage: linux
UpgradeStatus: Upgraded to trusty on 2014-12-24 (23 days ago)
WifiSyslog:
dmi.bios.date: 01/21/2011 :bvrA07: bd01/21/ 2011:svnDellInc .:pnOptiPlex980 :pvr:rvnDellInc .:rn0D441T: rvrA03: cvnDellInc. :ct6:cvr:
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A07
dmi.board.name: 0D441T
dmi.board.vendor: Dell Inc.
dmi.board.version: A03
dmi.chassis.type: 6
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.
dmi.product.name: OptiPlex 980
dmi.sys.vendor: Dell Inc.