Hi, I started using btrfs recently. Sometime today, my scratch disk started turning read-only. journalctl reports btrfs crashed (output shown below). ABRT says the problem cannot be reported. I don't understand this since I blacklisted the only module I'm aware of that might taint the kernel on my system (openafs). This happens within the first few minutes of boot. Immediately after boot I can write a simple file, but soon after it crashes. When I try to run btrfs check (after unmounting), I get a core dump: # btrfs check /dev/sda1 Checking filesystem on /dev/sda1 UUID: 19ec6a44-fc5b-428d-9aec-fda803ce805b checking extents Aborted (core dumped) I can't find any core file in the present working directory either. In case it is relevant, this filesystem was converted from ext4. What could be going wrong? How can I debug this? Thanks for any ideas. Cheers, BTRFS detecting my disk: Oct 19 18:30:09 localhost kernel: BTRFS: device fsid 19ec6a44-fc5b-428d-9aec-fda803ce805b devid 1 transid 1336 /dev/sda1 Oct 19 18:30:09 localhost kernel: BTRFS info (device sda1): disk space caching is enabled Oct 19 18:30:09 localhost kernel: BTRFS: has skinny extents BTRFS crash log: Oct 19 18:33:59 localhost kernel: ------------[ cut here ]------------ Oct 19 18:33:59 localhost kernel: WARNING: CPU: 1 PID: 152 at fs/btrfs/extent-tree.c:6255 __btrfs_free_extent.isra.68+0x8c8/0xd70 [btrfs]() Oct 19 18:33:59 localhost kernel: Modules linked in: ccm ip6t_rpfilter ip6t_REJECT nf_reject_ipv6 xt_conntrack ebtable_nat ebtable_broute bridge stp llc ebtable_filter ebtables ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle ip6table_security ip6table_raw ip6table_filter ip6_tables iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_mangle iptable_security iptable_raw btrfs arc4 xor intel_rapl iosf_mbi x86_pkg_temp_thermal iTCO_wdt coretemp kvm_intel iTCO_vendor_support kvm raid6_pq iwlmvm crct10dif_pclmul snd_hda_codec_hdmi crc32_pclmul crc32c_intel mac80211 snd_hda_codec_realtek snd_hda_codec_generic ghash_clmulni_intel uvcvideo snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep videobuf2_vmalloc snd_seq videobuf2_core videobuf2_memops snd_seq_device v4l2_common Oct 19 18:33:59 localhost kernel: iwlwifi snd_pcm videodev rtsx_pci_ms cfg80211 media thinkpad_acpi memstick i2c_i801 lpc_ich snd_timer snd tpm_tis wmi rfkill tpm soundcore mei_me mei shpchp binfmt_misc i915 rtsx_pci_sdmmc mmc_core i2c_algo_bit e1000e drm_kms_helper drm serio_raw ptp rtsx_pci pps_core video Oct 19 18:33:59 localhost kernel: CPU: 1 PID: 152 Comm: kworker/u16:5 Tainted: G W 4.2.3-200.fc22.x86_64 #1 Oct 19 18:33:59 localhost kernel: Hardware name: LENOVO 20ALCTO1WW/20ALCTO1WW, BIOS GIET66WW (2.16 ) 12/02/2013 Oct 19 18:33:59 localhost kernel: Workqueue: btrfs-extent-refs btrfs_extent_refs_helper [btrfs] Oct 19 18:33:59 localhost kernel: 0000000000000000 00000000673d9c47 ffff8802125d7a88 ffffffff8177220a Oct 19 18:33:59 localhost kernel: 0000000000000000 0000000000000000 ffff8802125d7ac8 ffffffff8109e4a6 Oct 19 18:33:59 localhost kernel: 0000000000000002 00000001874d9000 00000000fffffffe 0000000000000000 Oct 19 18:33:59 localhost kernel: Call Trace: Oct 19 18:33:59 localhost kernel: [<ffffffff8177220a>] dump_stack+0x45/0x57 Oct 19 18:33:59 localhost kernel: [<ffffffff8109e4a6>] warn_slowpath_common+0x86/0xc0 Oct 19 18:33:59 localhost kernel: [<ffffffff8109e5da>] warn_slowpath_null+0x1a/0x20 Oct 19 18:33:59 localhost kernel: [<ffffffffa07ae628>] __btrfs_free_extent.isra.68+0x8c8/0xd70 [btrfs] Oct 19 18:33:59 localhost kernel: [<ffffffffa0816a5a>] ? find_ref_head+0x5a/0x80 [btrfs] Oct 19 18:33:59 localhost kernel: [<ffffffffa07b23c8>] __btrfs_run_delayed_refs+0x998/0x1080 [btrfs] Oct 19 18:33:59 localhost kernel: [<ffffffff81200083>] ? kmem_cache_alloc+0x193/0x210 Oct 19 18:33:59 localhost kernel: [<ffffffffa07b5674>] btrfs_run_delayed_refs.part.73+0x74/0x270 [btrfs] Oct 19 18:33:59 localhost kernel: [<ffffffffa07b590e>] delayed_ref_async_start+0x7e/0x90 [btrfs] Oct 19 18:33:59 localhost kernel: [<ffffffffa07fb322>] btrfs_scrubparity_helper+0xc2/0x260 [btrfs] Oct 19 18:33:59 localhost kernel: [<ffffffffa07fb4fe>] btrfs_extent_refs_helper+0xe/0x10 [btrfs] Oct 19 18:33:59 localhost kernel: [<ffffffff810b64fe>] process_one_work+0x19e/0x3f0 Oct 19 18:33:59 localhost kernel: [<ffffffff810b679e>] worker_thread+0x4e/0x450 Oct 19 18:33:59 localhost kernel: [<ffffffff810b6750>] ? process_one_work+0x3f0/0x3f0 Oct 19 18:33:59 localhost kernel: [<ffffffff810b6750>] ? process_one_work+0x3f0/0x3f0 Oct 19 18:33:59 localhost kernel: [<ffffffff810bc8a8>] kthread+0xd8/0xf0 Oct 19 18:33:59 localhost kernel: [<ffffffff810bc7d0>] ? kthread_worker_fn+0x160/0x160 Oct 19 18:33:59 localhost kernel: [<ffffffff81778fdf>] ret_from_fork+0x3f/0x70 Oct 19 18:33:59 localhost kernel: [<ffffffff810bc7d0>] ? kthread_worker_fn+0x160/0x160 Oct 19 18:33:59 localhost kernel: ---[ end trace 0eadb91546850dac ]--- Oct 19 18:33:59 localhost kernel: BTRFS info (device sda1): leaf 139591680 total ptrs 184 free space 5551 Oct 19 18:33:59 localhost kernel: item 0 key (6554550272 169 0) itemoff 16250 itemsize 33 Oct 19 18:33:59 localhost kernel: extent refs 1 gen 355 flags 2 Oct 19 18:33:59 localhost kernel: tree block backref root 7 then it repeats like that many times. The log ends like this: Oct 19 18:33:59 localhost kernel: BTRFS error (device sda1): unable to find ref byte nr 6564974592 parent 0 root 7 owner 2 offset 0 Oct 19 18:33:59 localhost kernel: ------------[ cut here ]------------ Oct 19 18:33:59 localhost kernel: WARNING: CPU: 1 PID: 152 at fs/btrfs/extent-tree.c:6261 __btrfs_free_extent.isra.68+0x92f/0xd70 [btrfs]() Oct 19 18:33:59 localhost kernel: BTRFS: Transaction aborted (error -2) Oct 19 18:33:59 localhost kernel: Modules linked in: ccm ip6t_rpfilter ip6t_REJECT nf_reject_ipv6 xt_conntrack ebtable_nat ebtable_broute bridge stp llc ebtable_filter ebtables ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle ip6table_security ip6table_raw ip6table_filter ip6_tables iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_mangle iptable_security iptable_raw btrfs arc4 xor intel_rapl iosf_mbi x86_pkg_temp_thermal iTCO_wdt coretemp kvm_intel iTCO_vendor_support kvm raid6_pq iwlmvm crct10dif_pclmul snd_hda_codec_hdmi crc32_pclmul crc32c_intel mac80211 snd_hda_codec_realtek snd_hda_codec_generic ghash_clmulni_intel uvcvideo snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep videobuf2_vmalloc snd_seq videobuf2_core videobuf2_memops snd_seq_device v4l2_common Oct 19 18:33:59 localhost kernel: iwlwifi snd_pcm videodev rtsx_pci_ms cfg80211 media thinkpad_acpi memstick i2c_i801 lpc_ich snd_timer snd tpm_tis wmi rfkill tpm soundcore mei_me mei shpchp binfmt_misc i915 rtsx_pci_sdmmc mmc_core i2c_algo_bit e1000e drm_kms_helper drm serio_raw ptp rtsx_pci pps_core video Oct 19 18:33:59 localhost kernel: CPU: 1 PID: 152 Comm: kworker/u16:5 Tainted: G W 4.2.3-200.fc22.x86_64 #1 Oct 19 18:33:59 localhost kernel: Hardware name: LENOVO 20ALCTO1WW/20ALCTO1WW, BIOS GIET66WW (2.16 ) 12/02/2013 Oct 19 18:33:59 localhost kernel: Workqueue: btrfs-extent-refs btrfs_extent_refs_helper [btrfs] Oct 19 18:33:59 localhost kernel: 0000000000000000 00000000673d9c47 ffff8802125d7a28 ffffffff8177220a Oct 19 18:33:59 localhost kernel: 0000000000000000 ffff8802125d7a80 ffff8802125d7a68 ffffffff8109e4a6 Oct 19 18:33:59 localhost kernel: ffffffffa0849349 00000001874d9000 00000000fffffffe 0000000000000000 Oct 19 18:33:59 localhost kernel: Call Trace: Oct 19 18:33:59 localhost kernel: [<ffffffff8177220a>] dump_stack+0x45/0x57 Oct 19 18:33:59 localhost kernel: [<ffffffff8109e4a6>] warn_slowpath_common+0x86/0xc0 Oct 19 18:33:59 localhost kernel: [<ffffffff8109e535>] warn_slowpath_fmt+0x55/0x70 Oct 19 18:33:59 localhost kernel: [<ffffffffa07ae68f>] __btrfs_free_extent.isra.68+0x92f/0xd70 [btrfs] Oct 19 18:33:59 localhost kernel: [<ffffffffa0816a5a>] ? find_ref_head+0x5a/0x80 [btrfs] Oct 19 18:33:59 localhost kernel: [<ffffffffa07b23c8>] __btrfs_run_delayed_refs+0x998/0x1080 [btrfs] Oct 19 18:33:59 localhost kernel: [<ffffffff81200083>] ? kmem_cache_alloc+0x193/0x210 Oct 19 18:33:59 localhost kernel: [<ffffffffa07b5674>] btrfs_run_delayed_refs.part.73+0x74/0x270 [btrfs] Oct 19 18:33:59 localhost kernel: [<ffffffffa07b590e>] delayed_ref_async_start+0x7e/0x90 [btrfs] Oct 19 18:33:59 localhost kernel: [<ffffffffa07fb322>] btrfs_scrubparity_helper+0xc2/0x260 [btrfs] Oct 19 18:33:59 localhost kernel: [<ffffffffa07fb4fe>] btrfs_extent_refs_helper+0xe/0x10 [btrfs] Oct 19 18:33:59 localhost kernel: [<ffffffff810b64fe>] process_one_work+0x19e/0x3f0 Oct 19 18:33:59 localhost kernel: [<ffffffff810b679e>] worker_thread+0x4e/0x450 Oct 19 18:33:59 localhost kernel: [<ffffffff810b6750>] ? process_one_work+0x3f0/0x3f0 Oct 19 18:33:59 localhost kernel: [<ffffffff810b6750>] ? process_one_work+0x3f0/0x3f0 Oct 19 18:33:59 localhost kernel: [<ffffffff810bc8a8>] kthread+0xd8/0xf0 Oct 19 18:33:59 localhost kernel: [<ffffffff810bc7d0>] ? kthread_worker_fn+0x160/0x160 Oct 19 18:33:59 localhost kernel: [<ffffffff81778fdf>] ret_from_fork+0x3f/0x70 Oct 19 18:33:59 localhost kernel: [<ffffffff810bc7d0>] ? kthread_worker_fn+0x160/0x160 Oct 19 18:33:59 localhost kernel: ---[ end trace 0eadb91546850dad ]--- Oct 19 18:33:59 localhost kernel: BTRFS: error (device sda1) in __btrfs_free_extent:6261: errno=-2 No such entry Oct 19 18:33:59 localhost kernel: BTRFS info (device sda1): forced readonly Oct 19 18:33:59 localhost kernel: BTRFS: error (device sda1) in btrfs_run_delayed_refs:2781: errno=-2 No such entry Oct 19 18:33:59 localhost kernel: BTRFS warning (device sda1): Skipping commit of aborted transaction. Oct 19 18:33:59 localhost kernel: BTRFS: error (device sda1) in cleanup_transaction:1710: errno=-2 No such entry -- Suvayu Open source is the future. It sets us free. -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines Have a question? Ask away: http://ask.fedoraproject.org
