On Thu, Oct 9, 2014 at 10:19 AM, Petr Janecek <jane...@ucw.cz> wrote: > > I have trouble finishing btrfs balance on five disk raid10 fs. > I added a disk to 4x3TB raid10 fs and run "btrfs balance start > /mnt/b3", which segfaulted after few hours, probably because of the BUG > below. "btrfs check" does not find any errors, both before the balance > and after reboot (the fs becomes un-umountable). > > [22744.238559] WARNING: CPU: 0 PID: 4211 at fs/btrfs/extent-tree.c:876 > btrfs_lookup_extent_info+0x292/0x30a [btrfs]() > > [22744.532378] kernel BUG at fs/btrfs/extent-tree.c:7727!
I am running into something similar. I just added a 3TB drive to my raid1 btrfs and started a balance. The balance segfaulted, and I find this in dmesg: [453046.291762] BTRFS info (device sde2): relocating block group 10367073779712 flags 17 [453062.494151] BTRFS info (device sde2): found 13 extents [453069.283368] ------------[ cut here ]------------ [453069.283468] kernel BUG at /data/src/linux-3.17.0-gentoo/fs/btrfs/relocation.c:931! [453069.283590] invalid opcode: 0000 [#1] SMP [453069.283666] Modules linked in: vhost_net vhost macvtap macvlan tun ipt_MASQUERADE xt_conntrack veth nfsd auth_rpcgss oid_registry lockd iptable_mangle iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_filter ip_tables it87 hwmon_vid hid_logitech_dj nxt200x cx88_dvb videobuf_dvb dvb_core cx88_vp3054_i2c tuner_simple tuner_types tuner mousedev hid_generic usbhid cx88_alsa radeon cx8800 cx8802 cx88xx snd_hda_codec_realtek btcx_risc snd_hda_codec_generic videobuf_dma_sg videobuf_core kvm_amd tveeprom kvm rc_core v4l2_common cfbfillrect fbcon videodev cfbimgblt snd_hda_intel bitblit snd_hda_controller cfbcopyarea softcursor font tileblit i2c_algo_bit k10temp snd_hda_codec backlight drm_kms_helper snd_hwdep i2c_piix4 ttm snd_pcm snd_timer drm snd soundcore 8250 evdev [453069.285043] serial_core ext4 crc16 jbd2 mbcache zram lz4_compress zsmalloc ata_generic pata_acpi btrfs xor zlib_deflate atkbd raid6_pq ohci_pci firewire_ohci firewire_core crc_itu_t pata_atiixp ehci_pci ohci_hcd ehci_hcd usbcore usb_common r8169 mii sunrpc dm_mirror dm_region_hash dm_log dm_mod [453069.285552] CPU: 1 PID: 17270 Comm: btrfs Not tainted 3.17.0-gentoo #1 [453069.285657] Hardware name: Gigabyte Technology Co., Ltd. GA-880GM-UD2H/GA-880GM-UD2H, BIOS F8 10/11/2010 [453069.285806] task: ffff88040ec556e0 ti: ffff88010cf94000 task.ti: ffff88010cf94000 [453069.285925] RIP: 0010:[<ffffffffa02ddd62>] [<ffffffffa02ddd62>] build_backref_tree+0x1152/0x11b0 [btrfs] [453069.286137] RSP: 0018:ffff88010cf97848 EFLAGS: 00010206 [453069.286223] RAX: ffff8800ae67c800 RBX: ffff880122e94000 RCX: ffff880122e949c0 [453069.286336] RDX: 000009270788d000 RSI: ffff880054c3fbc0 RDI: ffff8800ae67c800 [453069.286449] RBP: ffff88010cf97958 R08: 00000000000159a0 R09: ffff880122e94000 [453069.286561] R10: 0000000000000003 R11: 0000000000000000 R12: ffff8802da313000 [453069.286674] R13: ffff8802da313c60 R14: ffff880122e94780 R15: ffff88040c277000 [453069.286787] FS: 00007f175ac51880(0000) GS:ffff880427c40000(0000) knlGS:00000000f7333b40 [453069.286913] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [453069.287005] CR2: 00007f208de58000 CR3: 00000003b0a9c000 CR4: 00000000000007e0 [453069.287116] Stack: [453069.287151] ffff88010cf97868 ffff880122e94000 01ff880122e94300 ffff880342156060 [453069.287282] ffff880122e94780 ffff8802da313c60 ffff880122e94600 ffff8800ae67c800 [453069.287412] ffff880122e947c0 ffff8802da313000 ffff88040c277120 ffff880100000005 [453069.287542] Call Trace: [453069.287640] [<ffffffffa02ddfa3>] relocate_tree_blocks+0x1e3/0x630 [btrfs] [453069.287796] [<ffffffffa02e0550>] relocate_block_group+0x3d0/0x650 [btrfs] [453069.287951] [<ffffffffa02e0958>] btrfs_relocate_block_group+0x188/0x2a0 [btrfs] [453069.288113] [<ffffffffa02b48f0>] btrfs_relocate_chunk.isra.61+0x70/0x780 [btrfs] [453069.288276] [<ffffffffa02c7fd0>] ? btrfs_set_lock_blocking_rw+0x70/0xc0 [btrfs] [453069.288438] [<ffffffffa02b0e79>] ? free_extent_buffer+0x59/0xb0 [btrfs] [453069.288590] [<ffffffffa02b8e99>] btrfs_balance+0x829/0xf40 [btrfs] [453069.288738] [<ffffffffa02bf80f>] btrfs_ioctl_balance+0x1af/0x510 [btrfs] [453069.288890] [<ffffffffa02c59e4>] btrfs_ioctl+0xa54/0x2950 [btrfs] [453069.288995] [<ffffffff8111d016>] ? lru_cache_add_active_or_unevictable+0x26/0x90 [453069.289119] [<ffffffff8113a061>] ? handle_mm_fault+0xbe1/0xdb0 [453069.289219] [<ffffffff811ffdce>] ? cred_has_capability+0x5e/0x100 [453069.289323] [<ffffffff8104065c>] ? __do_page_fault+0x1fc/0x4f0 [453069.289422] [<ffffffff8117d80e>] do_vfs_ioctl+0x7e/0x4f0 [453069.289513] [<ffffffff811ff64f>] ? file_has_perm+0x8f/0xa0 [453069.289606] [<ffffffff8117dd09>] SyS_ioctl+0x89/0xa0 [453069.289692] [<ffffffff81040a1c>] ? do_page_fault+0xc/0x10 [453069.289785] [<ffffffff814f5752>] system_call_fastpath+0x16/0x1b [453069.289881] Code: ff ff 48 8b 9d 20 ff ff ff e9 11 ff ff ff 0f 0b be ec 03 00 00 48 c7 c7 d0 f0 30 a0 e8 28 00 d7 e0 e9 06 f3 ff ff e8 c4 42 02 00 <0f> 0b 3c b0 0f 84 72 f1 ff ff be 22 03 00 00 48 c7 c7 d0 f0 30 [453069.290429] RIP [<ffffffffa02ddd62>] build_backref_tree+0x1152/0x11b0 [btrfs] [453069.290591] RSP <ffff88010cf97848> [453069.316194] ---[ end trace 5fdc0af4cc62bf41 ]--- It looks like I can't cancel the balance, so I'll probably have to reboot. -- Rich -- 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
