Hello, This morning, my system refused to boot because it couldn't find the root filesystem anymore. The root filesystem is ext4 on LVM on dm-crypt on bcache. Booting from a recovery medium, I got the following from dmesg: [ 10.346673] e1000e: eth1 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: Rx/Tx [ 148.588402] bcache: error on 1330b5f6-0c13-43ec-b925-2ee2734b135f: bad btree header at bucket 85065, block 0, 0 keys, disabling caching [ 148.588414] bcache: register_cache() registered cache device sdb2 [ 148.588696] BUG: unable to handle kernel NULL pointer dereference at 00000000000009b0 [ 148.588701] IP: [<ffffffffc01f67da>] register_bcache+0x108a/0x17a0 [bcache] [ 148.588734] PGD d951d067 PUD 36748067 PMD 0 [ 148.588738] Oops: 0000 [#1] SMP [ 148.588742] Modules linked in: bnep(E) arc4(E) intel_rapl(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) kvm(E) irqbypass(E) crct10dif_pclmul(E) mxm_wmi(E) iwlmvm(E) mac80211(E) iTCO_wdt(E) iTCO_vendor_support(E) eeepc_wmi(E) asus_wmi(E) sparse_keymap(E) crc32_pclmul(E) iwlwifi(E) uvcvideo(E) videobuf2_vmalloc(E) videobuf2_memops(E) videobuf2_v4l2(E) videobuf2_core(E) videodev(E) ghash_clmulni_intel(E) media(E) evdev(E) cfg80211(E) shpchp(E) hmac(E) drbg(E) ansi_cprng(E) aesni_intel(E) aes_x86_64(E) lrw(E) gf128mul(E) glue_helper(E) ablk_helper(E) cryptd(E) btusb(E) btrtl(E) btbcm(E) tpm_tis(E) battery(E) btintel(E) snd_hda_codec_realtek(E) snd_hda_codec_generic(E) bluetooth(E) rfkill(E) pcspkr(E) serio_raw(E) snd_hda_codec_hdmi(E) snd_hda_intel(E) snd_hda_codec(E) mei_me(E) [ 148.588780] mei(E) lpc_ich(E) mfd_core(E) tpm(E) i2c_i801(E) snd_hda_core(E) snd_hwdep(E) snd_pcm(E) snd_timer(E) snd(E) processor(E) soundcore(E) video(E) button(E) wmi(E) fuse(E) autofs4(E) ext4(E) crc16(E) mbcache(E) jbd2(E) btrfs(E) xor(E) raid6_pq(E) hid_generic(E) uas(E) usbhid(E) usb_storage(E) hid(E) dm_mod(E) bcache(E) sg(E) sr_mod(E) cdrom(E) sd_mod(E) ahci(E) libahci(E) ehci_pci(E) crc32c_intel(E) ehci_hcd(E) libata(E) psmouse(E) usbcore(E) usb_common(E) scsi_mod(E) e1000e(E) ptp(E) pps_core(E) fan(E) thermal(E) fjes(E) [ 148.588816] CPU: 3 PID: 1368 Comm: bcache-register Tainted: G E 4.5.0-0.bpo.2-amd64 #1 Debian 4.5.4-1~bpo8+1 [ 148.588818] Hardware name: System manufacturer System Product Name/P8Z68-V GEN3, BIOS 3603 11/09/2012 [ 148.588821] task: ffff8804081e2ec0 ti: ffff8800da748000 task.ti: ffff8800da748000 [ 148.588822] RIP: 0010:[<ffffffffc01f67da>] [<ffffffffc01f67da>] register_bcache+0x108a/0x17a0 [bcache] [ 148.588834] RSP: 0018:ffff8800da74bde8 EFLAGS: 00010202 [ 148.588835] RAX: ffff880409a20000 RBX: ffff88040a083000 RCX: ffff880409a20000 [ 148.588837] RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffffffffc0205180 [ 148.588838] RBP: ffffffffc0205180 R08: ffffffffc0205180 R09: 0000002298927e0f [ 148.588839] R10: ffff8800365a3901 R11: 0000000000000000 R12: ffff88040dc036c0 [ 148.588840] R13: ffff880408341ed8 R14: ffffffffc0202932 R15: fffffffffffffff0 [ 148.588842] FS: 00007fbe24a74700(0000) GS:ffff88041ecc0000(0000) knlGS:0000000000000000 [ 148.588844] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 148.588846] CR2: 00000000000009b0 CR3: 00000000365ad000 CR4: 00000000000406e0 [ 148.588847] Stack: [ 148.588849] 024680ca00000080 ffff88040a0d4c20 000000000000000a ffff8800d94f3928 [ 148.588852] ffffffff811abc55 0000000000000286 0000000000000286 ffff8800da7a0408 [ 148.588854] 00007fbe24a81000 ffffffff811a12ba 00000000024000c0 ffff880000000408 [ 148.588857] Call Trace: [ 148.588868] [<ffffffff811abc55>] ? page_add_new_anon_rmap+0x95/0xd0 [ 148.588872] [<ffffffff811a12ba>] ? handle_mm_fault+0x13ca/0x1b90 [ 148.588878] [<ffffffff81267007>] ? kernfs_fop_write+0x117/0x160 [ 148.588883] [<ffffffff811eb624>] ? vfs_write+0xa4/0x190 [ 148.588887] [<ffffffff811ec602>] ? SyS_write+0x52/0xc0 [ 148.588894] [<ffffffff815ba236>] ? system_call_fast_compare_end+0xc/0x6b [ 148.588895] Code: 42 d0 48 81 fa b0 51 20 c0 48 89 c1 48 8d 7e d0 49 89 f8 0f 84 49 06 00 00 0f b7 b1 34 04 00 00 48 8b 91 40 0c 00 00 85 f6 74 39 <4c> 3b a2 b0 09 00 00 0f 84 a2 00 00 00 83 ee 01 48 8d 91 48 0c [ 148.588920] RIP [<ffffffffc01f67da>] register_bcache+0x108a/0x17a0 [bcache] [ 148.588934] RSP <ffff8800da74bde8> [ 148.588935] CR2: 00000000000009b0 [ 148.588946] ---[ end trace 0b7d5d2eba253662 ]--- This is the kernel from the rescue system, the kernel on the actual system is newer. At the moment, I can't figure out either the version number nor the exact error message because the system won't boot. Is there any way to tell if the problem here is with bcache or with one of the disks? Best, -Nikolaus -- GPG Fingerprint: ED31 791B 2C5C 1613 AF38 8B8A D113 FCAC 3C4E 599F »Time flies like an arrow, fruit flies like a Banana.« -- To unsubscribe from this list: send the line "unsubscribe linux-bcache" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
