Hello, Distro: Ubuntu 10.10 Kernel: Linux 2.6.35-28-generic #50-Ubuntu SMP Fri Mar 18 18:42:20 UTC 2011 x86_64 GNU/Linux Btrfs tools version: Btrfs Btrfs v0.19 I currently have 2 X 500GB hard drives in 'raid1' mode with about 400GB used. Recently one of the hard drives crashed (but I have a backup) but I'd like to help out if I can because I'm currently getting an error when trying to 'rebuild' the filesystem. I've mounted the array in degraded mode and added the new hard drive. Finally I issued the command to delete the missing device. The dmesg looks normal for a while with messages such as: btrfs: relocating block group 466167529472 flags 17. However, after a few minutes of running I get the following: [ 1770.041623] ------------[ cut here ]------------ [ 1770.041655] kernel BUG at /build/buildd/linux-2.6.35/fs/btrfs/volumes.c:3037! [ 1770.041684] invalid opcode: 0000 [#1] SMP [ 1770.041707] last sysfs file: /sys/devices/virtual/bdi/btrfs-3/uevent [ 1770.041734] CPU 1 [ 1770.041744] Modules linked in: btrfs sha256_generic cryptd aes_x86_64 aes_generic parport_pc ppdev dm_crypt xt_state xt_multiport iptable_filter iptable_mangle ipt_MASQUERADE xt_tcpudp iptable_nat ip_tables x_tables nf_nat_sip nf_nat nf_conntrack_sip nf_conntrack_ftp nf_conntrack_ipv4 nf_conntrack nf_defrag_ipv4 usblp led_class serio_raw lp parport raid10 raid456 async_pq async_xor xor async_memcpy async_raid6_recov raid6_pq async_tx raid0 multipath linear zlib_deflate crc32c libcrc32c raid1 i915 drm_kms_helper firewire_ohci drm firewire_core crc_itu_t sky2 e1000 intel_agp i2c_algo_bit video output [last unloaded: btrfs] [ 1770.042098] [ 1770.042108] Pid: 4598, comm: flush-btrfs-3 Not tainted 2.6.35-28-generic #50-Ubuntu FG31/SG31 [ 1770.042142] RIP: 0010:[<ffffffffa0351ccc>] [<ffffffffa0351ccc>] btrfs_map_bio+0x1ec/0x210 [btrfs] [ 1770.042198] RSP: 0018:ffff8800ce8ef7f0 EFLAGS: 00010246 [ 1770.042221] RAX: 0000000000000030 RBX: 0000000000000001 RCX: 0000000000000000 [ 1770.042925] RDX: ffff8801280a6b40 RSI: ffff880128db7600 RDI: ffff8800ceab0000 [ 1770.043645] RBP: ffff8800ce8ef850 R08: 0000000000000000 R09: 0000000000000002 [ 1770.044381] R10: ffff88011e8d8678 R11: 0000000000000002 R12: ffff8801280a69c0 [ 1770.045144] R13: 0000000000000000 R14: 0000000000000002 R15: ffff8801280a66c0 [ 1770.045910] FS: 0000000000000000(0000) GS:ffff880001e80000(0000) knlGS:0000000000000000 [ 1770.046701] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [ 1770.047509] CR2: 00007f90b42f8cc1 CR3: 00000000ced70000 CR4: 00000000000006e0 [ 1770.048343] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1770.049196] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [ 1770.050055] Process flush-btrfs-3 (pid: 4598, threadinfo ffff8800ce8ee000, task ffff880128aa2dc0) [ 1770.050955] Stack: [ 1770.051254] 0000000000000001 000000002ee4e020 ffff8801285f0000 0000000000000001 [ 1770.051254] <0> ffff8801280a6b40 000000000000c000 0000000000000000 ffff88011e8d8560 [ 1770.051254] <0> ffff8801285f0000 ffff8801280a66c0 0000000000000001 0000000000000000 [ 1770.051254] Call Trace: [ 1770.051254] [<ffffffffa032ba71>] btrfs_submit_bio_hook+0x91/0x140 [btrfs] [ 1770.051254] [<ffffffffa034658a>] submit_one_bio+0x6a/0xa0 [btrfs] [ 1770.051254] [<ffffffffa03466b3>] submit_extent_page+0xf3/0x280 [btrfs] [ 1770.051254] [<ffffffffa034b9db>] __extent_writepage+0x49b/0x6d0 [btrfs] [ 1770.051254] [<ffffffffa03482d0>] ? end_bio_extent_writepage+0x0/0x180 [btrfs] [ 1770.051254] [<ffffffffa034bf68>] T.990+0x1f8/0x360 [btrfs] [ 1770.051254] [<ffffffffa034c1e6>] extent_writepages+0x46/0x60 [btrfs] [ 1770.051254] [<ffffffffa0334a10>] ? btrfs_get_extent+0x0/0x8b0 [btrfs] [ 1770.051254] [<ffffffff8107f9f4>] ? bit_waitqueue+0x14/0xd0 [ 1770.051254] [<ffffffffa032c6b7>] btrfs_writepages+0x27/0x30 [btrfs] [ 1770.051254] [<ffffffff8110b831>] do_writepages+0x21/0x40 [ 1770.051254] [<ffffffff81175d56>] writeback_single_inode+0xe6/0x3f0 [ 1770.051254] [<ffffffff8104d528>] ? update_curr+0xf8/0x1e0 [ 1770.051254] [<ffffffff811764c5>] writeback_sb_inodes+0x195/0x280 [ 1770.051254] [<ffffffff81176ce0>] writeback_inodes_wb+0xa0/0x1b0 [ 1770.051254] [<ffffffff8117703b>] wb_writeback+0x24b/0x2b0 [ 1770.051254] [<ffffffff8107058c>] ? lock_timer_base+0x3c/0x70 [ 1770.051254] [<ffffffff810710c2>] ? del_timer_sync+0x22/0x30 [ 1770.051254] [<ffffffff81177149>] wb_do_writeback+0xa9/0x190 [ 1770.051254] [<ffffffff810706a0>] ? process_timeout+0x0/0x10 [ 1770.051254] [<ffffffff81177283>] bdi_writeback_task+0x53/0x160 [ 1770.051254] [<ffffffff8107f9f7>] ? bit_waitqueue+0x17/0xd0 [ 1770.051254] [<ffffffff8111af46>] bdi_start_fn+0x86/0x100 [ 1770.051254] [<ffffffff8111aec0>] ? bdi_start_fn+0x0/0x100 [ 1770.051254] [<ffffffff8107f5d6>] kthread+0x96/0xa0 [ 1770.051254] [<ffffffff8100aee4>] kernel_thread_helper+0x4/0x10 [ 1770.051254] [<ffffffff8107f540>] ? kthread+0x0/0xa0 [ 1770.051254] [<ffffffff8100aee0>] ? kernel_thread_helper+0x0/0x10 [ 1770.051254] Code: 24 10 48 8b 45 a8 49 89 04 24 e8 00 f4 e2 e0 e9 f9 fe ff ff 48 8b 7d c0 e8 12 0f df e0 66 90 eb 8a 83 7e 64 00 0f 85 43 ff ff ff <0f> 0b 66 90 eb fc 4c 89 ea 4c 89 e6 48 c7 c7 f8 f2 36 a0 31 c0 [ 1770.051254] RIP [<ffffffffa0351ccc>] btrfs_map_bio+0x1ec/0x210 [btrfs] [ 1770.051254] RSP <ffff8800ce8ef7f0> [ 1770.091790] ---[ end trace 0c19202b55031f21 ]--- Before this error occurs the system appears to be doing stuff. Process list includes btrfs processes, disks are busy, etc. After this error the btrfs processes are no longer adding a load and the disk activity goes to idle. Also, the 'delete missing' command appears to hang. The mount appears to function including the ability to read files/add new files etc. I get a similar error if I try to do a balance instead of a delete missing. Any thoughts? Any other information I can provide? Thanks, Brandon -- 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
