From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tomasz Chmielewski Subject: replacing failed disks in RAID-1 (kernel BUG)? Date: Mon, 13 Jul 2009 12:28:09 +0200 Message-ID: <4A5B0C39.5030905@wpkg.org> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed To: linux-btrfs@vger.kernel.org Return-path: List-ID: How do I replace failed disks in RAID-1 mode? I followed the http://btrfs.wiki.kernel.org/index.php/Using_Btrfs_with_Multiple_Devices, but it triggered a kernel BUG (using 2.6.30.1 kernel): # mount -o degraded /dev/sdb4 /mnt/btrfs/ # btrfs-vol -r missing /mnt/btrfs/ removing missing devices from /mnt/btrfs/ ioctl returns -1 # dmesg -c btrfs: unable to go below two devices on raid1 # btrfs-vol -a /dev/sda4 /mnt/btrfs/ Speicherzugriffsfehler # dmesg btrfs allocation failed flags 18, wanted 4096 space_info has 8384512 free, is not full space_info total=8388608, pinned=0, delalloc=0, may_use=0, used=4096 block group 20971520 has 8388608 bytes, 4096 used 0 pinned 0 reserved entry offset 20975616, bytes 8384512 1 blocks of free space at or bigger than bytes is ------------[ cut here ]------------ kernel BUG at fs/btrfs/extent-tree.c:2930! invalid opcode: 0000 [#1] SMP last sysfs file: /sys/devices/system/cpu/cpu7/cache/index2/shared_cpu_map CPU 1 Modules linked in: btrfs zlib_deflate crc32c libcrc32c cpufreq_stats tun af_packet fglrx(P) ipv6 coretemp binfmt_misc loop ext3 jbd joydev dm_mod hid_multilaser usbhid cpufreq_ondemand cpufreq_conservative cpufreq_powersave acpi_cpufreq freq_table hid kvm_intel kvm snd_hda_codec_atihdmi snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_seq_dummy snd_hwdep snd_seq_oss snd_seq_midi_event snd_seq snd_seq_device snd_pcm_oss snd_pcm snd_timer snd_mixer_oss snd pcspkr soundcore e1000e iTCO_wdt iTCO_vendor_support serio_raw snd_page_alloc i2c_i801 rtc_cmos i2c_core evdev thermal processor button wmi ehci_hcd uhci_hcd sr_mod sg usbcore ata_piix ahci libata sd_mod scsi_mod crc_t10dif raid1 ext4 jbd2 crc16 Pid: 23996, comm: btrfs-vol Tainted: P 2.6.30.1-desktop-1mnb #1 RIP: 0010:[] [] __btrfs_reserve_extent+0x296/0x310 [btrfs] RSP: 0018:ffff8800bb441808 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff88023cd9da2c RCX: 000000000001ffff RDX: 0000000000000000 RSI: 0000000000000246 RDI: 0000000000000246 RBP: ffff8800bb4418b8 R08: 000000000000ddd9 R09: 000000000000000a R10: 0000000000000000 R11: 0000000000000000 R12: ffff88023d644c68 R13: 0000000000001000 R14: ffff88023d644d30 R15: ffff88023d644d18 FS: 00007ffc25a67740(0000) GS:ffff88002f21b000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b CR2: 00007f0645383ea4 CR3: 00000000be85c000 CR4: 00000000000026e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Process btrfs-vol (pid: 23996, threadinfo ffff8800bb440000, task ffff88013a1a0000) Stack: 0000000000000000 ffff8800bb441988 0000000000000000 0000000000000000 0000000000000012 ffff88023fc016d0 ffff8800bb4418a8 ffff880149532000 0000000000000000 ffff8800bb441988 ffffffffffffffff 0000000000000000 Call Trace: [] btrfs_alloc_extent+0x6e/0x100 [btrfs] [] btrfs_alloc_free_block+0x79/0xd0 [btrfs] [] __btrfs_cow_block+0x199/0x880 [btrfs] [] btrfs_cow_block+0x11d/0x250 [btrfs] [] btrfs_search_slot+0x476/0x8c0 [btrfs] [] btrfs_insert_empty_items+0x8d/0x100 [btrfs] [] ? btrfs_alloc_path+0x28/0x50 [btrfs] [] btrfs_add_device+0x89/0x210 [btrfs] [] ? kill_bdev+0x44/0x70 [] btrfs_init_new_device+0x65a/0xb20 [btrfs] [] ? btrfs_ioctl+0x3cd/0x910 [btrfs] [] btrfs_ioctl+0x3ef/0x910 [btrfs] [] vfs_ioctl+0x30/0xd0 [] ? inotify_inode_queue_event+0xf3/0x130 [] ? apic_timer_interrupt+0xe/0x20 [] do_vfs_ioctl+0x31b/0x5b0 [] ? up_read+0x1c/0x40 [] sys_ioctl+0x99/0xc0 [] system_call_fastpath+0x16/0x1b Code: 4c 8b 63 58 49 81 ec b0 00 00 00 49 8b 84 24 b0 00 00 00 0f 18 08 49 8d 84 24 b0 00 00 00 49 39 c7 75 27 4c 89 f7 e8 2a 79 bd df <0f> 0b eb fe be 5c 0b 00 00 48 c7 c7 9b d2 6e a0 e8 05 5d bb df RIP [] __btrfs_reserve_extent+0x296/0x310 [btrfs] RSP ---[ end trace a51370eaca1eb6d6 ]--- -- Tomasz Chmielewski http://wpkg.org