On Fri, Dec 11, 2015 at 10:50 AM, Ivan Sizov <sivan...@gmail.com> wrote: > Btrfs crashes in few seconds after mounting RW. > If it's important: the volume was converted from ext4. "ext2_saved" > subvolume still presents. > > dmesg: > [ 625.998387] BTRFS info (device sda1): disk space caching is enabled > [ 625.998392] BTRFS: has skinny extents > [ 627.727708] BTRFS: checking UUID tree > [ 708.514128] ------------[ cut here ]------------ > [ 708.514161] WARNING: CPU: 1 PID: 2263 at fs/btrfs/extent-tree.c:6255 > __btrfs_free_extent.isra.68+0x8c8/0xd70 [btrfs]() > [ 708.514164] Modules linked in: bnep bluetooth rfkill ip6t_rpfilter > ip6t_REJECT nf_reject_ipv6 xt_conntrack ebtable_broute bridge ebtable_filter > ebtable_nat ebtables ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 > nf_nat_ipv6 ip6table_raw ip6table_security ip6table_mangle ip6table_filter > ip6_tables iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat > nf_conntrack iptable_raw iptable_security iptable_mangle gpio_ich coretemp > kvm_intel kvm iTCO_wdt iTCO_vendor_support snd_hda_codec_realtek > snd_hda_codec_generic snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep > snd_seq snd_seq_device lpc_ich snd_pcm snd_timer ppdev snd i2c_i801 mei_me > mei soundcore parport_pc parport shpchp tpm_infineon tpm_tis tpm acpi_cpufreq > nfsd auth_rpcgss nfs_acl lockd grace isofs squashfs btrfs xor raid6_pq i915 > hid_logitech_hidpp > [ 708.514277] 8021q garp stp video llc mrp i2c_algo_bit drm_kms_helper > r8169 uas crc32c_intel drm serio_raw mii hid_logitech_dj usb_storage > scsi_dh_rdac scsi_dh_emc scsi_dh_alua sunrpc loop > [ 708.514311] CPU: 1 PID: 2263 Comm: btrfs-transacti Not tainted > 4.2.3-300.fc23.x86_64 #1 > [ 708.514315] Hardware name: MSI MS-7636/H55M-P31(MS-7636) , BIOS V1.9 > 09/14/2010 > [ 708.514319] 0000000000000000 00000000f50458a6 ffff880066b03ad8 > ffffffff81771fca > [ 708.514326] 0000000000000000 0000000000000000 ffff880066b03b18 > ffffffff8109e4a6 > [ 708.514332] 0000000000000002 000000252f595000 00000000fffffffe > 0000000000000000 > [ 708.514338] Call Trace: > [ 708.514349] [<ffffffff81771fca>] dump_stack+0x45/0x57 > [ 708.514359] [<ffffffff8109e4a6>] warn_slowpath_common+0x86/0xc0 > [ 708.514365] [<ffffffff8109e5da>] warn_slowpath_null+0x1a/0x20 > [ 708.514391] [<ffffffffa0305628>] __btrfs_free_extent.isra.68+0x8c8/0xd70 > [btrfs] > [ 708.514429] [<ffffffffa036da5a>] ? find_ref_head+0x5a/0x80 [btrfs] > [ 708.514456] [<ffffffffa03093c8>] __btrfs_run_delayed_refs+0x998/0x1080 > [btrfs] > [ 708.514477] [<ffffffffa030c674>] > btrfs_run_delayed_refs.part.73+0x74/0x270 [btrfs] > [ 708.514496] [<ffffffffa030c885>] btrfs_run_delayed_refs+0x15/0x20 [btrfs] > [ 708.514518] [<ffffffffa0320f26>] btrfs_commit_transaction+0x56/0xad0 > [btrfs] > [ 708.514541] [<ffffffffa031c604>] transaction_kthread+0x214/0x230 [btrfs] > [ 708.514564] [<ffffffffa031c3f0>] ? btrfs_cleanup_transaction+0x500/0x500 > [btrfs] > [ 708.514569] [<ffffffff810bc8a8>] kthread+0xd8/0xf0 > [ 708.514574] [<ffffffff810bc7d0>] ? kthread_worker_fn+0x160/0x160 > [ 708.514581] [<ffffffff81778d9f>] ret_from_fork+0x3f/0x70 > [ 708.514585] [<ffffffff810bc7d0>] ? kthread_worker_fn+0x160/0x160 > [ 708.514588] ---[ end trace 6731111f3bf2295a ]--- > [ 708.514594] BTRFS info (device sda1): leaf 535035904 total ptrs 204 free > space 4451 > [ 708.514598] item 0 key (159696797696 169 0) itemoff 16250 itemsize 33 > [ 708.514601] extent refs 1 gen 21134 flags 2 > [ 708.514604] tree block backref root 2 > [ 708.514609] item 1 key (159696830464 169 1) itemoff 16217 itemsize 33 > [ 708.514612] extent refs 1 gen 21134 flags 2 > [ 708.514615] tree block backref root 2 > [ 708.514619] item 2 key (159696846848 169 0) itemoff 16184 itemsize 33 > > *********** a lot of similar messages *********** > > [ 708.516923] item 203 key (159711268864 169 0) itemoff 9551 itemsize 33 > [ 708.516927] extent refs 1 gen 21082 flags 2 > [ 708.516930] tree block backref root 384 > [ 708.516937] BTRFS error (device sda1): unable to find ref byte nr > 159708172288 parent 0 root 385 owner 2 offset 0 > [ 708.516944] ------------[ cut here ]------------ > [ 708.516975] WARNING: CPU: 1 PID: 2263 at fs/btrfs/extent-tree.c:6261 > __btrfs_free_extent.isra.68+0x92f/0xd70 [btrfs]() > [ 708.516979] BTRFS: Transaction aborted (error -2) > [ 708.516982] Modules linked in: bnep bluetooth rfkill ip6t_rpfilter > ip6t_REJECT nf_reject_ipv6 xt_conntrack ebtable_broute bridge ebtable_filter > ebtable_nat ebtables ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 > nf_nat_ipv6 ip6table_raw ip6table_security ip6table_mangle ip6table_filter > ip6_tables iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat > nf_conntrack iptable_raw iptable_security iptable_mangle gpio_ich coretemp > kvm_intel kvm iTCO_wdt iTCO_vendor_support snd_hda_codec_realtek > snd_hda_codec_generic snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep > snd_seq snd_seq_device lpc_ich snd_pcm snd_timer ppdev snd i2c_i801 mei_me > mei soundcore parport_pc parport shpchp tpm_infineon tpm_tis tpm acpi_cpufreq > nfsd auth_rpcgss nfs_acl lockd grace isofs squashfs btrfs xor raid6_pq i915 > hid_logitech_hidpp > [ 708.517075] 8021q garp stp video llc mrp i2c_algo_bit drm_kms_helper > r8169 uas crc32c_intel drm serio_raw mii hid_logitech_dj usb_storage > scsi_dh_rdac scsi_dh_emc scsi_dh_alua sunrpc loop > [ 708.517108] CPU: 1 PID: 2263 Comm: btrfs-transacti Tainted: G W > 4.2.3-300.fc23.x86_64 #1 > [ 708.517112] Hardware name: MSI MS-7636/H55M-P31(MS-7636) , BIOS V1.9 > 09/14/2010 > [ 708.517115] 0000000000000000 00000000f50458a6 ffff880066b03a78 > ffffffff81771fca > [ 708.517123] 0000000000000000 ffff880066b03ad0 ffff880066b03ab8 > ffffffff8109e4a6 > [ 708.517129] ffffffffa03a0349 000000252f595000 00000000fffffffe > 0000000000000000 > [ 708.517135] Call Trace: > [ 708.517143] [<ffffffff81771fca>] dump_stack+0x45/0x57 > [ 708.517150] [<ffffffff8109e4a6>] warn_slowpath_common+0x86/0xc0 > [ 708.517157] [<ffffffff8109e535>] warn_slowpath_fmt+0x55/0x70 > [ 708.517186] [<ffffffffa030568f>] __btrfs_free_extent.isra.68+0x92f/0xd70 > [btrfs] > [ 708.517226] [<ffffffffa036da5a>] ? find_ref_head+0x5a/0x80 [btrfs] > [ 708.517262] [<ffffffffa03093c8>] __btrfs_run_delayed_refs+0x998/0x1080 > [btrfs] > [ 708.517288] [<ffffffffa030c674>] > btrfs_run_delayed_refs.part.73+0x74/0x270 [btrfs] > [ 708.517317] [<ffffffffa030c885>] btrfs_run_delayed_refs+0x15/0x20 [btrfs] > [ 708.517351] [<ffffffffa0320f26>] btrfs_commit_transaction+0x56/0xad0 > [btrfs] > [ 708.517382] [<ffffffffa031c604>] transaction_kthread+0x214/0x230 [btrfs] > [ 708.517411] [<ffffffffa031c3f0>] ? btrfs_cleanup_transaction+0x500/0x500 > [btrfs] > [ 708.517419] [<ffffffff810bc8a8>] kthread+0xd8/0xf0 > [ 708.517425] [<ffffffff810bc7d0>] ? kthread_worker_fn+0x160/0x160 > [ 708.517432] [<ffffffff81778d9f>] ret_from_fork+0x3f/0x70 > [ 708.517439] [<ffffffff810bc7d0>] ? kthread_worker_fn+0x160/0x160 > [ 708.517444] ---[ end trace 6731111f3bf2295b ]--- > [ 708.517450] BTRFS: error (device sda1) in __btrfs_free_extent:6261: > errno=-2 No such entry > [ 708.517455] BTRFS info (device sda1): forced readonly > [ 708.517464] BTRFS: error (device sda1) in btrfs_run_delayed_refs:2781: > errno=-2 No such entry > [ 708.517580] pending csums is 139264 > [ 841.017119] BTRFS error (device sda1): cleaner transaction attach returned > -30 > > > I checked the filesystem extents: > > $ sudo btrfs check --subvol-extents 5 /dev/sda1 > Print extent state for subvolume 5 on /dev/sda1 > UUID: 6de5c663-bc65-4120-8cf6-5309fd25aa7e > checksum verify failed on 159708168192 found 3659C180 wanted 8EE67C14 > checksum verify failed on 159708168192 found 3659C180 wanted 8EE67C14 > bytenr mismatch, want=159708168192, have=16968404070778227820 > ERROR: while mapping refs: -5 > extent_io.c:582: free_extent_buffer: Assertion `eb->refs < 0` failed. > btrfs(+0x51e9e)[0x56283f4bde9e] > btrfs(free_extent_buffer+0xc0)[0x56283f4be9b0] > btrfs(btrfs_free_fs_root+0x11)[0x56283f4aef11] > btrfs(rb_free_nodes+0x21)[0x56283f4d7cc1] > btrfs(close_ctree+0x194)[0x56283f4b0214] > btrfs(cmd_check+0x486)[0x56283f49ace6] > btrfs(main+0x82)[0x56283f47fad2] > /lib64/libc.so.6(__libc_start_main+0xf0)[0x7f8cbea98580] > btrfs(_start+0x29)[0x56283f47fbd9] > $ > > Will "btrfs check --repair" fix my problem or make it worse? > Fedora 23. Installed (but now broken) system has 4.2.5 kernel. A live > CD has kernel 4.2.3 with btrfs-progs 4.2.2!
I would not repair it if the risk of it getting worse is bad for your data. Note the wiki says this feature is not well tested and is reported to not work reliably. https://btrfs.wiki.kernel.org/index.php/Conversion_from_Ext3 Qu is working on patches to fix some of these problems, I don't know the status of any of that. I just did a conversion myself the other day with kernel 4.4.0rc3 and btrfs-progs 4.3.1 and that worked without error. But there were also no big files at all (it was just a clean OS installation). I immediately took a snapshot of that, and btrfs send/receive it to a new Btrfs volume, and then discarded the converted one entirely. The trace looks like it's mounting read-only? If it can be mounted read only, get the important data off the volume if it's not already backed up, and then blow it away. I personally wouldn't bother with repairing it. -- Chris Murphy -- 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
