Hello list, I'm still busy trying to figure out how to get VMs running without corruption (see http://www.spinics.net/lists/linux-btrfs/msg27300.html) and in the process of this, I tried to remove the "@vmware" subvolume I've made.
This seems to trigger some bug, as dmesg is showing an OOPS (2 I believe). The filesystem is then remounted read-only. I am running kernel 3.12-rc1, but I can also confirm this o 3.11.0. The storage setup is: - 2 physical disks (sda = HDD, sdb = SSD) - SSD is configured as bcache "caching device" for HDD (the "backing device") - /dev/bcache0 is a LVM PV, with one VG, and one LV (unfortunately, this was necessary for the Debian / Ubuntu setup to recognize the device as a non-partitionable device) formatted as BTRFS. - The BTRFS filesystem has several subvolumes (some done by the Ubuntu installer) - None of the subvolumes have any snapshots configured whatsoever Command I use to remove (maybe this is wrong?): # mount /dev/vgSystem/lvBTRFS /mnt # cd /mnt # ls @ @home @kvm @virtualbox @vmware # btrfs sub delete @vmware Here is the error from dmesg: [ 56.910180] ------------[ cut here ]------------ [ 56.910197] WARNING: CPU: 3 PID: 1979 at fs/btrfs/uuid-tree.c:171 btrfs_uuid_tree_rem+0x1ec/0x210() [ 56.910201] Modules linked in: rfcomm(F) bnep(F) serpent_avx_x86_64(F) serpent_sse2_x86_64(F) serpent_generic(F) lrw(F) glue_helper(F) ablk_helper(F) cryptd(F) xts(F) gf128mul(F) binfmt_misc(F) dm_crypt(F) arc4(F) ip6t_REJECT(F) xt_hl(F) ip6t_rt(F) nf_conntrack_ipv6(F) nf_defrag_ipv6(F) ipt_REJECT(F) xt_LOG(F) xt_limit(F) xt_tcpudp(F) xt_addrtype(F) iwldvm(F) nf_conntrack_ipv4(F) btusb(F) nf_defrag_ipv4(F) mac80211(F) joydev(F) xt_state(F) snd_hda_codec_hdmi(F) bluetooth(F) snd_hda_codec_idt(F) snd_hda_intel(F) snd_hda_codec(F) psmouse(F) iwlwifi(F) snd_hwdep(F) ip6table_filter(F) ip6_tables(F) snd_pcm(F) nf_conntrack_netbios_ns(F) nf_conntrack_broadcast(F) nf_nat_ftp(F) nf_nat(F) nf_conntrack_ftp(F) nf_conntrack(F) snd_page_alloc(F) iptable_filter(F) ip_tables(F) snd_seq_midi(F) snd_seq_midi_event(F) dell_wmi(F) sparse_keymap(F) x_tables(F) snd_rawmidi(F) dell_laptop(F) dcdbas(F) snd_seq(F) cfg80211(F) serio_raw(F) lpc_ich(F) mfd_core(F) snd_seq_device(F) snd_timer(F) snd(F) soundcore(F) hid_logitech_dj(F) usbhid(F) hid(F) firewire_ohci(F) nouveau(F) ahci(F) libahci(F) mxm_wmi(F) e1000e(F) wmi(F) ttm(F) firewire_core(F) sdhci_pci(F) crc_itu_t(F) sdhci(F) ptp(F) pps_core(F) i915(F) video(F) i2c_algo_bit(F) drm_kms_helper(F) drm(F) i2c_core(F) [ 56.910315] CPU: 3 PID: 1979 Comm: btrfs Tainted: GF 3.12.0-rc1-bcache-00060-g31b8586 #1 [ 56.910318] Hardware name: Dell Inc. Latitude E6520/0J4TFW, BIOS A17 03/07/2013 [ 56.910322] 0000000000000009 ffff88022f7f5c28 ffffffff816b1dc3 0000000000000000 [ 56.910328] ffff88022f7f5c60 ffffffff810480bc ffff88023031ff00 ffff88022ec30f00 [ 56.910334] 0000000000000000 ffff880231c54000 0000000000000000 ffff88022f7f5c70 [ 56.910340] Call Trace: [ 56.910351] [<ffffffff816b1dc3>] dump_stack+0x4e/0x82 [ 56.910359] [<ffffffff810480bc>] warn_slowpath_common+0x8c/0xc0 [ 56.910366] [<ffffffff8104810a>] warn_slowpath_null+0x1a/0x20 [ 56.910371] [<ffffffff8131e3bc>] btrfs_uuid_tree_rem+0x1ec/0x210 [ 56.910377] [<ffffffff8128cde6>] ? btrfs_free_path+0x26/0x30 [ 56.910384] [<ffffffff812e9a6a>] ? btrfs_insert_orphan_item+0x6a/0x90 [ 56.910389] [<ffffffff812e5393>] btrfs_ioctl_snap_destroy+0x573/0x670 [ 56.910395] [<ffffffff812e7b08>] btrfs_ioctl+0x1018/0x25c0 [ 56.910403] [<ffffffff8115185c>] ? handle_mm_fault+0x42c/0x1030 [ 56.910411] [<ffffffff81435239>] ? n_tty_write+0x1b9/0x4d0 [ 56.910418] [<ffffffff816b8bd8>] ? _raw_spin_unlock_irqrestore+0x18/0x40 [ 56.910424] [<ffffffff816bc4a4>] ? __do_page_fault+0x204/0x500 [ 56.910430] [<ffffffff81431f6c>] ? tty_write+0x1cc/0x2b0 [ 56.910435] [<ffffffff81435080>] ? process_echoes+0x90/0x90 [ 56.910443] [<ffffffff811a2bcc>] do_vfs_ioctl+0x8c/0x4f0 [ 56.910450] [<ffffffff81190a6c>] ? vfs_write+0x16c/0x1e0 [ 56.910456] [<ffffffff811a30c1>] SyS_ioctl+0x91/0xb0 [ 56.910462] [<ffffffff816bc7ae>] ? do_page_fault+0xe/0x10 [ 56.910468] [<ffffffff816c0846>] system_call_fastpath+0x1a/0x1f [ 56.910472] ---[ end trace 16cd56b9210c7fea ]--- [ 56.910475] ------------[ cut here ]------------ [ 56.910482] WARNING: CPU: 3 PID: 1979 at fs/btrfs/super.c:255 __btrfs_abort_transaction+0x12d/0x140() [ 56.910485] btrfs: Transaction aborted (error -22) [ 56.910487] Modules linked in: rfcomm(F) bnep(F) serpent_avx_x86_64(F) serpent_sse2_x86_64(F) serpent_generic(F) lrw(F) glue_helper(F) ablk_helper(F) cryptd(F) xts(F) gf128mul(F) binfmt_misc(F) dm_crypt(F) arc4(F) ip6t_REJECT(F) xt_hl(F) ip6t_rt(F) nf_conntrack_ipv6(F) nf_defrag_ipv6(F) ipt_REJECT(F) xt_LOG(F) xt_limit(F) xt_tcpudp(F) xt_addrtype(F) iwldvm(F) nf_conntrack_ipv4(F) btusb(F) nf_defrag_ipv4(F) mac80211(F) joydev(F) xt_state(F) snd_hda_codec_hdmi(F) bluetooth(F) snd_hda_codec_idt(F) snd_hda_intel(F) snd_hda_codec(F) psmouse(F) iwlwifi(F) snd_hwdep(F) ip6table_filter(F) ip6_tables(F) snd_pcm(F) nf_conntrack_netbios_ns(F) nf_conntrack_broadcast(F) nf_nat_ftp(F) nf_nat(F) nf_conntrack_ftp(F) nf_conntrack(F) snd_page_alloc(F) iptable_filter(F) ip_tables(F) snd_seq_midi(F) snd_seq_midi_event(F) dell_wmi(F) sparse_keymap(F) x_tables(F) snd_rawmidi(F) dell_laptop(F) dcdbas(F) snd_seq(F) cfg80211(F) serio_raw(F) lpc_ich(F) mfd_core(F) snd_seq_device(F) snd_timer(F) snd(F) soundcore(F) hid_logitech_dj(F) usbhid(F) hid(F) firewire_ohci(F) nouveau(F) ahci(F) libahci(F) mxm_wmi(F) e1000e(F) wmi(F) ttm(F) firewire_core(F) sdhci_pci(F) crc_itu_t(F) sdhci(F) ptp(F) pps_core(F) i915(F) video(F) i2c_algo_bit(F) drm_kms_helper(F) drm(F) i2c_core(F) [ 56.910579] CPU: 3 PID: 1979 Comm: btrfs Tainted: GF W 3.12.0-rc1-bcache-00060-g31b8586 #1 [ 56.910582] Hardware name: Dell Inc. Latitude E6520/0J4TFW, BIOS A17 03/07/2013 [ 56.910584] 0000000000000009 ffff88022f7f5c18 ffffffff816b1dc3 ffff88022f7f5c60 [ 56.910590] ffff88022f7f5c50 ffffffff810480bc 00000000ffffffea ffff88022d339800 [ 56.910595] ffff880231957000 ffffffff818465b0 00000000000008cc ffff88022f7f5cb0 [ 56.910601] Call Trace: [ 56.910607] [<ffffffff816b1dc3>] dump_stack+0x4e/0x82 [ 56.910613] [<ffffffff810480bc>] warn_slowpath_common+0x8c/0xc0 [ 56.910619] [<ffffffff810481ac>] warn_slowpath_fmt+0x4c/0x50 [ 56.910626] [<ffffffff8128981d>] __btrfs_abort_transaction+0x12d/0x140 [ 56.910631] [<ffffffff812e546c>] btrfs_ioctl_snap_destroy+0x64c/0x670 [ 56.910637] [<ffffffff812e7b08>] btrfs_ioctl+0x1018/0x25c0 [ 56.910642] [<ffffffff8115185c>] ? handle_mm_fault+0x42c/0x1030 [ 56.910648] [<ffffffff81435239>] ? n_tty_write+0x1b9/0x4d0 [ 56.910653] [<ffffffff816b8bd8>] ? _raw_spin_unlock_irqrestore+0x18/0x40 [ 56.910660] [<ffffffff816bc4a4>] ? __do_page_fault+0x204/0x500 [ 56.910664] [<ffffffff81431f6c>] ? tty_write+0x1cc/0x2b0 [ 56.910670] [<ffffffff81435080>] ? process_echoes+0x90/0x90 [ 56.910676] [<ffffffff811a2bcc>] do_vfs_ioctl+0x8c/0x4f0 [ 56.910681] [<ffffffff81190a6c>] ? vfs_write+0x16c/0x1e0 [ 56.910687] [<ffffffff811a30c1>] SyS_ioctl+0x91/0xb0 [ 56.910692] [<ffffffff816bc7ae>] ? do_page_fault+0xe/0x10 [ 56.910697] [<ffffffff816c0846>] system_call_fastpath+0x1a/0x1f [ 56.910701] ---[ end trace 16cd56b9210c7feb ]--- [ 56.910706] BTRFS error (device dm-0) in btrfs_ioctl_snap_destroy:2252: errno=-22 unknown [ 56.910710] BTRFS info (device dm-0): forced readonly [ 66.772123] btrfs: use spread ssd allocation scheme [ 66.772133] btrfs: disk space caching is enabled Thanks for any response, Sincerely, Roel Brook -- 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
