Hello linux-btrfs, Our package build server (which uses btrfs snapshots to copy build chroots, rapidly deleting and creating them) has run into a btrfs error today:
[ 8.405865] device label chroots devid 1 transid 93081 /dev/dm-4 [ 8.670127] device label chroots devid 1 transid 93081 /dev/mapper/vg_brynhild-chroots [ 8.670630] btrfs: use lzo compression [ 8.670633] btrfs: disk space caching is enabled [ 227.316041] btrfs: run_one_delayed_ref returned -17 [ 227.316045] ------------[ cut here ]------------ [ 227.316060] WARNING: at fs/btrfs/super.c:246 __btrfs_abort_transaction+0xad/0xc0 [btrfs]() [ 227.316061] Hardware name: MS-7522 [ 227.316062] btrfs: Transaction aborted [ 227.316063] Modules linked in: [ 227.316064] tun btrfs libcrc32c zlib_deflate coretemp kvm_intel kvm acpi_cpufreq uhci_hcd crc32c_intel mperf i7core_edac iTCO_wdt iTCO_vendor_support ehci_hcd gpio_ic h i2c_i801 r8169 edac_core i2c_core lpc_ich usbcore microcode wmi usb_common processor mii ext4 crc16 jbd2 mbcache dm_mod raid1 md_mod sd_mod ahci libahci libata scsi_mod [ 227.316087] Pid: 2390, comm: btrfs-endio-wri Not tainted 3.6.3-1-ARCH #1 [ 227.316089] Call Trace: [ 227.316096] [<ffffffff81055c7f>] warn_slowpath_common+0x7f/0xc0 [ 227.316099] [<ffffffff81055d76>] warn_slowpath_fmt+0x46/0x50 [ 227.316105] [<ffffffffa07dbecd>] __btrfs_abort_transaction+0xad/0xc0 [btrfs] [ 227.316113] [<ffffffffa07f273a>] btrfs_run_delayed_refs+0x23a/0x2e0 [btrfs] [ 227.316122] [<ffffffffa0804d67>] __btrfs_end_transaction+0xc7/0x3a0 [btrfs] [ 227.316131] [<ffffffffa08050b5>] btrfs_end_transaction+0x15/0x20 [btrfs] [ 227.316140] [<ffffffffa080afc5>] btrfs_finish_ordered_io+0x135/0x420 [btrfs] [ 227.316148] [<ffffffffa080b2c5>] finish_ordered_fn+0x15/0x20 [btrfs] [ 227.316157] [<ffffffffa082baed>] worker_loop+0x13d/0x570 [btrfs] [ 227.316166] [<ffffffffa082b9b0>] ? btrfs_queue_worker+0x320/0x320 [btrfs] [ 227.316169] [<ffffffff81079913>] kthread+0x93/0xa0 [ 227.316174] [<ffffffff8149ad84>] kernel_thread_helper+0x4/0x10 [ 227.316177] [<ffffffff81079880>] ? kthread_freezable_should_stop+0x70/0x70 [ 227.316179] [<ffffffff8149ad80>] ? gs_change+0x13/0x13 [ 227.316181] ---[ end trace 4c297f2ed063eaf3 ]--- [ 227.316183] BTRFS error (device dm-4) in btrfs_run_delayed_refs:2521: Object already exists [ 227.316231] btrfs is forced readonly [ 249.074396] ------------[ cut here ]------------ [ 249.074436] kernel BUG at fs/btrfs/transaction.c:1640! [ 249.074472] invalid opcode: 0000 [#1] PREEMPT SMP [ 249.074587] Modules linked in: tun btrfs libcrc32c zlib_deflate coretemp kvm_intel kvm acpi_cpufreq uhci_hcd crc32c_intel mperf i7core_edac iTCO_wdt iTCO_vendor_support ehci_hcd gpio_ich i2c_i801 r8169 edac_core i2c_core lpc_ich usbcore microcode wmi usb_common processor mii ext4 crc16 jbd2 mbcache dm_mod raid1 md_mod sd_mod ahci libahci libata scsi_mod [ 249.075723] CPU 5 [ 249.075755] Pid: 377, comm: btrfs-cleaner Tainted: G W 3.6.3-1-ARCH #1 MSI MS-7522/MSI X58 Pro-E (MS-7522) [ 249.075827] RIP: 0010:[<ffffffffa08059a1>] [<ffffffffa08059a1>] btrfs_clean_old_snapshots+0x141/0x150 [btrfs] [ 249.075909] RSP: 0018:ffff88022c597e60 EFLAGS: 00010286 [ 249.075945] RAX: 00000000ffffffe2 RBX: ffff880228912470 RCX: 00000000ffffffe2 [ 249.075985] RDX: 0000000000001bb5 RSI: ffffffffa08655e0 RDI: ffff880233364000 [ 249.076024] RBP: ffff88022c597ea0 R08: 0000000000000000 R09: ffff88023fcbb900 [ 249.076064] R10: ffffffffa07df07a R11: ffffffffa07f4430 R12: ffff88022c597e60 [ 249.076103] R13: ffff880000000000 R14: 0000160000000000 R15: ffff880228912000 [ 249.076143] FS: 0000000000000000(0000) GS:ffff88023fca0000(0000) knlGS:0000000000000000 [ 249.076211] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [ 249.076262] CR2: 00007fae5271a934 CR3: 000000000180c000 CR4: 00000000000007e0 [ 249.076315] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 249.076368] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [ 249.076421] Process btrfs-cleaner (pid: 377, threadinfo ffff88022c596000, task ffff88022ca93060) [ 249.076489] Stack: [ 249.076603] ffff880228911c70 ffff88023227bc70 ffff88022ca93060 ffff880233324800 [ 249.076784] ffff88022ca93060 ffff88022ca93060 ffff88022ca93060 0000000000000000 [ 249.076955] ffff88022c597ee0 ffffffffa07fc7d8 ffff880233324800 0000000000000000 [ 249.077126] Call Trace: [ 249.077175] [<ffffffffa07fc7d8>] cleaner_kthread+0xa8/0x120 [btrfs] [ 249.077231] [<ffffffffa07fc730>] ? btrfs_alloc_root+0x50/0x50 [btrfs] [ 249.077286] [<ffffffff81079913>] kthread+0x93/0xa0 [ 249.077408] [<ffffffff8149ad84>] kernel_thread_helper+0x4/0x10 [ 249.077466] [<ffffffff81079880>] ? kthread_freezable_should_stop+0x70/0x70 [ 249.077523] [<ffffffff8149ad80>] ? gs_change+0x13/0x13 [ 249.077571] Code: 7f 80 31 d2 31 f6 4c 89 ff e8 ac e8 fe ff eb 81 66 2e 0f 1f 84 00 00 00 00 00 48 83 c4 18 31 c0 5b 41 5c 41 5d 41 5e 41 5f 5d c3 <0f> 0b 90 90 90 90 90 90 90 90 90 90 90 90 90 55 48 89 e5 66 66 [ 249.079375] RIP [<ffffffffa08059a1>] btrfs_clean_old_snapshots+0x141/0x150 [btrfs] [ 249.079473] RSP <ffff88022c597e60> [ 249.079528] ---[ end trace 4c297f2ed063eaf4 ]--- fstab: /dev/mapper/vg_brynhild-chroots /var/lib/archbuild btrfs noatime,subvolid=0,compress=lzo 0 2 The btrfs is contained in a LVM on an md RAID1. I'll have to overwrite the FS to get work to resume, so more debugging on this particular filesystem will be impossible. :( btrfs-debug-tree output is available, though, if wanted (321.7 MiB xz-compressed; 3,805.0 MiB uncompressed). Regards, Jan Steffens -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
