Background:
Was checking E-mail and browsing the internet when suddenly Pidgin crashed out.
I thought that was pretty weird so I went to go re-start Pidgin when I noticed
the machine hang really hard for about 30 seconds. The machine finally came
back and that's when I noticed that my E-mail client (Claws Mail) had stopped
responding. I 'touch'ed a file in my home dir and that was fine, but then I
went to md5sum a large file and it came back with an I/O error. I ran dmesg and
found that there had been a kernel dump (or whatever the proper term is)
related to BTRFS. I went to shut down my programs gracefully and do a reboot,
unfortunately none of my programs (FF, Pidgin, Claws-Mail, one or two others)
wanted to respond so I just used the power-button.
I switched my Intel X-25M (2nd gen, latest FW as of about a month ago) to a
different SATA cable and on a different port on the motherboard (Supermicro
C2SBX) to see if there was some sort of hardware problem there. I booted again
into Gentoo and the boot failed (I'm guessing it failed after trying to mount
the root partition as RO the first time).
I booted in to System Rescue CD 1.5.1 and tried to mount the partition and
mount returned with a SegFault and dmesg spit out the following:
[code]
[ 75.218065] device label root devid 1 transid 4446 /dev/sda3
[ 75.225843] btrfs: sda3 checksum verify failed on 42488987648 wanted
FC733AC3 found F7794308 level 1
[ 75.226049] btrfs: sda3 checksum verify failed on 42488987648 wanted
FC733AC3 found F7794308 level 1
[ 75.226238] btrfs: sda3 checksum verify failed on 42488987648 wanted
FC733AC3 found F7794308 level 1
[ 75.226271] Btrfs detected SSD devices, enabling SSD mode
[ 75.226490] [ cut here ]
[ 75.226492] kernel BUG at fs/btrfs/extent-tree.c:3541!
[ 75.226494] invalid opcode: [#1] SMP
[ 75.226497] last sysfs file: /sys/kernel/uevent_seqnum
[ 75.226499] CPU 0
[ 75.226500] Modules linked in: video nvidiafb output shpchp pci_hotplug
hid_apple i2c_i801 processor button container i2c_core pcspkr psmouse serio_raw
vgastate evdev iTCO_wdt iTCO_vendor_support x38_edac edac_core raid10 raid456
async_raid6_recov async_pq raid6_pq async_xor xor async_memcpy async_tx raid1
raid0 multipath linear md_mod sg sd_mod sr_mod crc_t10dif cdrom usbhid hid
uhci_hcd ahci libata e1000e ehci_hcd scsi_mod thermal usbcore thermal_sys
[ 75.226534] Pid: 1804, comm: mount Not tainted 2.6.32.10-std151-amd64 #1
C2SBX
[ 75.226536] RIP: 0010:[] []
btrfs_pin_extent+0x28/0xab
[ 75.226545] RSP: 0018:88013abeba48 EFLAGS: 00010246
[ 75.226547] RAX: RBX: 0009e492c000 RCX: 0007c1bf
[ 75.226549] RDX: RSI: 88013a93e000 RDI: 4000
[ 75.226552] RBP: 1000 R08: 88013abebb68 R09: 00080050
[ 75.226554] R10: 027c R11: 000338c6 R12: 88013a414000
[ 75.226556] R13: R14: R15: 812cb15f
[ 75.226564] FS: () GS:88000540(0063)
knlGS:f75e4b60
[ 75.226566] CS: 0010 DS: 002b ES: 002b CR0: 8005003b
[ 75.226568] CR2: f76b2890 CR3: 00013b324000 CR4: 06f0
[ 75.226570] DR0: DR1: DR2:
[ 75.226572] DR3: DR6: 0ff0 DR7: 0400
[ 75.226574] Process mount (pid: 1804, threadinfo 88013abea000, task
88013ab71500)
[ 75.226575] Stack:
[ 75.226576] 880134781a20 88013abebb68 115f
1000
[ 75.226579] <0> 88013abebb68 812cb18b 88013abebb14
880134781b40
[ 75.226582] <0> 88013dd8f800 812caa63 fffa
0009e492c000
[ 75.226585] Call Trace:
[ 75.226589] [] ? process_one_buffer+0x2c/0x5e
[ 75.226592] [] ? walk_down_log_tree+0x2c3/0x362
[ 75.226595] [] ? walk_log_tree+0x78/0x183
[ 75.226598] [] ? join_transaction+0x174/0x1a0
[ 75.226601] [] ? btrfs_recover_log_trees+0x92/0x283
[ 75.226603] [] ? btree_get_extent+0x0/0x18b
[ 75.226606] [] ? process_one_buffer+0x0/0x5e
[ 75.226609] [] ? btree_read_extent_buffer_pages+0x65/0xa3
[ 75.226612] [] ? open_ctree+0xee5/0x1137
[ 75.226615] [] ? vsnprintf+0x3f4/0x42d
[ 75.226619] [] ? btrfs_get_sb+0x1ad/0x3a2
[ 75.226623] [] ? vfs_kern_mount+0x96/0x15b
[ 75.226626] [] ? do_kern_mount+0x49/0xe7
[ 75.226629] [] ? do_mount+0x73e/0x7a4
[ 75.226633] [] ? compat_sys_mount+0x1f6/0x231
[ 75.226636] [] ? ia32_sysret+0x0/0x5
[ 75.226637] Code: 41 5d c3 41 56 41 55 41 89 cd 41 54 55 48 89 d5 53 4c 8b
a7 28 01 00 00 48 89 f3 4c 89 e7 e8 d7 e1 ff ff 48 85 c0 49 89 c6 75 04 <0f> 0b
eb fe 48 8b b8 90 00 00 00 48 81 c7 b8 00 00 00 e8 65 de
[ 75.226658] RIP [] btrfs_pin_extent+0x28/0xab
[ 75.226662] RSP
[ 75.226664] ---[ end trace 0ab19e2d653aad66 ]---
r...@sysresccd /root %
[/code]
I tried to mount it again
