Hello, > > I just got a BUG on mount of a raid10 fs. /dev/sde was added to > > the fs recently and balance has been started. After reboot (balance > > still running), the fs can not be mounted any more. > > > Try the skip_balance mount option (as described on the wiki or in the > btrfs (5) manpage). unfortunately, I get almost same trace with "-o skip_balance". Same thing happens on 4.9.2. Mounting "ro,skip_balance" works, so I can recover the data. But balance was supposed to be working, and running a balance after adding a device to almost full fs is imho exactly what one whould do. [...] > I'm just a user and list regular, not a dev, so dumps such as the below > don't mean much to me. Often, about the only thing useful I can pick out > of them is the kernel version (which matches what you provided in the > subject, 4.8.10), but in this case, there's something additional... > > > [ 1380.872569] BUG: unable to handle kernel paging request at > > fffffffffffffd60 > > [ 1380.879592] IP: [<ffffffffc045cf6f>] > > qgroup_fix_relocated_data_extents+0x1f/0x2a0 [btrfs] > > qgroup? You're using btrfs quotas? No, I confirmed that after the successful readonly mount. >From btrfs_recover_relocation(), qgroup_fix_relocated_data_extent() is called unconditionally, except for some error conditions before. Maybe that is the problem? Log from 4.9.2 is below. Regards Petr [ 135.044216] BUG: unable to handle kernel paging request at fffffffffffffd60 [ 135.051531] IP: [<ffffffffc06ef0ef>] qgroup_fix_relocated_data_extents+0x1f/0x2b0 [btrfs] [ 135.059953] PGD 1d5809067 [ 135.062597] PUD 1d580b067 PMD 0 [ 135.066153] [ 135.067858] Oops: 0000 [#1] SMP [ 135.071109] Modules linked in: nfsd auth_rpcgss oid_registry nfs_acl nfs lockd grace fscache sunrpc xfs libcrc32c crc32c_generic x86_pkg_temp_thermal coretemp kvm_intel kvm irqbypass crc32_pclmul iTCO_wdt ghash_clmulni_intel iTCO_vendor_support aesni_intel aes_x86_64 ablk_helper cryptd lrw loop mei_me i2c_i801 gf128mul ipmi_watchdog glue_helper pcspkr i2c_smbus mei raid10 acpi_cpufreq tpm_tis ie31200_edac tpm_tis_core md_mod evdev tpm battery video shpchp acpi_power_meter edac_core button processor ipmi_si ipmi_poweroff ipmi_devintf ipmi_msghandler autofs4 btrfs xor raid6_pq sg sd_mod hid_generic usbhid hid xhci_pci ahci igb xhci_hcd libahci i2c_algo_bit i2c_core mpt3sas dca raid_class usbcore libata scsi_transport_sas ptp crc32c_intel pps_core usb_common scsi_mod fan thermal [ 135.149994] CPU: 5 PID: 1180 Comm: mount Not tainted 4.9.2 #11 [ 135.155932] Hardware name: Supermicro Super Server/X11SSL-CF, BIOS 1.0a 01/29/2016 [ 135.163606] task: ffff97b615f271c0 task.stack: ffffb90f03db4000 [ 135.169653] RIP: 0010:[<ffffffffc06ef0ef>] [<ffffffffc06ef0ef>] qgroup_fix_relocated_data_extents+0x1f/0x2b0 [btrfs] [ 135.180548] RSP: 0018:ffffb90f03db7a00 EFLAGS: 00010246 [ 135.185981] RAX: 0000000000000000 RBX: ffff97b6162be000 RCX: 0000000000007ce5 [ 135.193239] RDX: ffff97b60c07aa90 RSI: ffff97b60703e000 RDI: ffff97b60c07aa00 [ 135.200501] RBP: ffff97b60ae46000 R08: ffff97b6162be000 R09: ffff97b60c07aa00 [ 135.207764] R10: 0000000000000000 R11: 0000000000000001 R12: ffffb90f03db7a98 [ 135.215027] R13: ffff97b60c07aa00 R14: ffff97b60703e000 R15: 0000000000000000 [ 135.222292] FS: 00007f748468d840(0000) GS:ffff97b637940000(0000) knlGS:0000000000000000 [ 135.230525] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 135.236399] CR2: fffffffffffffd60 CR3: 000000085651b000 CR4: 00000000003406e0 [ 135.243654] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 135.250909] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 135.258171] Stack: [ 135.260304] 0000000000000000 ffff97b60c07aa00 0000000000000801 ffff97b60ae80000 [ 135.268309] ffff97b60c07aa00 0000000000000801 ffffffffc069ca08 ffff97b615f271c0 [ 135.276317] 0000000000000000 0000000000000246 ffff97b614ca72a0 ffff97b60ae46000 [ 135.284335] Call Trace: [ 135.286917] [<ffffffffc069ca08>] ? start_transaction+0x98/0x4a0 [btrfs] [ 135.293762] [<ffffffffc06f2cc3>] ? btrfs_recover_relocation+0x3b3/0x440 [btrfs] [ 135.301321] [<ffffffffc06995aa>] ? open_ctree+0x214a/0x2600 [btrfs] [ 135.307817] [<ffffffffc066d41b>] ? btrfs_mount+0xd0b/0xe40 [btrfs] [ 135.314215] [<ffffffff8314c7d7>] ? pcpu_alloc_area+0x2a7/0x3d0 [ 135.320265] [<ffffffff834f373f>] ? __mutex_unlock_slowpath+0x9f/0x130 [ 135.326921] [<ffffffff8314d423>] ? pcpu_alloc+0x323/0x620 [ 135.332535] [<ffffffff83199fb1>] ? mount_fs+0x31/0x160 [ 135.337884] [<ffffffff83094047>] ? __init_waitqueue_head+0x17/0x30 [ 135.344281] [<ffffffff831b4c9d>] ? vfs_kern_mount+0x5d/0x110 [ 135.350153] [<ffffffffc066c8b4>] ? btrfs_mount+0x1a4/0xe40 [btrfs] [ 135.356545] [<ffffffff8314d423>] ? pcpu_alloc+0x323/0x620 [ 135.362151] [<ffffffff83199fb1>] ? mount_fs+0x31/0x160 [ 135.367499] [<ffffffff83094047>] ? __init_waitqueue_head+0x17/0x30 [ 135.373886] [<ffffffff831b4c9d>] ? vfs_kern_mount+0x5d/0x110 [ 135.379755] [<ffffffff831b7814>] ? do_mount+0x1b4/0xc30 [ 135.385190] [<ffffffff831b857f>] ? SyS_mount+0x7f/0xc0 [ 135.390535] [<ffffffff83001b5a>] ? do_syscall_64+0x6a/0x240 [ 135.396320] [<ffffffff834f6246>] ? entry_SYSCALL64_slow_path+0x25/0x25 [ 135.403062] Code: 00 00 5b 5d c3 0f 0b 0f 1f 44 00 00 41 57 41 56 41 55 41 54 55 53 48 83 ec 50 48 8b 46 08 4c 8b 7e 10 48 8b 98 f0 01 00 00 31 c0 <49> 8b af 60 fd ff ff 48 8b 53 20 83 e2 40 74 09 80 be d8 05 00 [ 135.429926] RIP [<ffffffffc06ef0ef>] qgroup_fix_relocated_data_extents+0x1f/0x2b0 [btrfs] [ 135.438474] RSP <ffffb90f03db7a00> [ 135.442082] CR2: fffffffffffffd60 [ 135.445526] ---[ end trace 603287b5bf87e6dd ]--- -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
