Created attachment 1273572 [details] dmesg output at time of latest crash. Description of problem: Being a happy user of BTRFS on my home NAS, I've been trying to use BTRFS as my primary filesystem on a couple of Fedora 25 machines, but I'm losing faith after running several times into filesystem corruptions that manifest themselves with messages that look like this: [525697.825951] audit: type=1131 audit(1493030444.892:5400): pid=1 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0 msg='unit=NetworkManager-dispatcher comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success' [525761.195108] btree_readpage_end_io_hook: 2 callbacks suppressed [525761.195114] BTRFS error (device sda4): bad tree block start 11022913622198796681 52432896 [525761.203698] BTRFS error (device sda4): bad tree block start 11022913622198796681 52432896 [525970.013112] ------------[ cut here ]------------ [525970.013138] WARNING: CPU: 5 PID: 471 at fs/btrfs/extent-tree.c:6938 __btrfs_free_extent.isra.58+0x7fd/0xe80 [btrfs] [525970.013139] Modules linked in: macvtap macvlan xt_CHECKSUM ipt_MASQUERADE nf_nat_masquerade_ipv4 tun rpcsec_gss_krb5 nfsv4 dns_resolver nfs fscache nf_conntrack_netbios_ns nf_conntrack_broadcast xt_CT ip6t_rpfilter ip6t_REJECT nf_reject_ipv6 xt_conntrack ip_set nfnetlink ebtable_broute bridge stp llc ebtable_nat ip6table_mangle ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_security ip6table_raw iptable_mangle iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack libcrc32c iptable_security iptable_raw ebtable_filter ebtables ip6table_filter ip6_tables binfmt_misc fuse snd_hda_codec_hdmi snd_hda_intel snd_hda_codec snd_hda_core intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp snd_hwdep kvm_intel kvm snd_seq rc_imon_pad snd_seq_device imon snd_pcm [525970.013199] irqbypass crct10dif_pclmul crc32_pclmul iTCO_wdt ghash_clmulni_intel intel_cstate rc_core intel_uncore intel_rapl_perf joydev iTCO_vendor_support gpio_ich ppdev snd_timer tpm_infineon tpm_tis tpm_tis_core snd i2c_i801 soundcore mei_me mei tpm parport_pc parport shpchp lpc_ich nfsd auth_rpcgss nfs_acl lockd grace sunrpc btrfs xor raid6_pq nouveau i915 mxm_wmi wmi ttm video i2c_algo_bit drm_kms_helper drm crc32c_intel serio_raw r8169 mii fjes [525970.013229] CPU: 5 PID: 471 Comm: btrfs-transacti Not tainted 4.10.6-200.fc25.x86_64 #1 [525970.013229] Hardware name: Gigabyte Technology Co., Ltd. Z68AP-D3/Z68AP-D3, BIOS F2 06/03/2011 [525970.013230] Call Trace: [525970.013237] dump_stack+0x63/0x86 [525970.013239] __warn+0xcb/0xf0 [525970.013241] warn_slowpath_null+0x1d/0x20 [525970.013256] __btrfs_free_extent.isra.58+0x7fd/0xe80 [btrfs] [525970.013272] __btrfs_run_delayed_refs+0xae9/0x1320 [btrfs] [525970.013275] ? __switch_to+0x227/0x460 [525970.013290] btrfs_run_delayed_refs+0x8f/0x2a0 [btrfs] [525970.013308] btrfs_commit_transaction+0x48/0x930 [btrfs] [525970.013323] ? start_transaction+0x99/0x460 [btrfs] [525970.013339] transaction_kthread+0x18c/0x1b0 [btrfs] [525970.013342] kthread+0x101/0x140 [525970.013357] ? btrfs_cleanup_transaction+0x540/0x540 [btrfs] [525970.013359] ? kthread_park+0x90/0x90 [525970.013361] ret_from_fork+0x2c/0x40 [525970.013363] ---[ end trace 0a5df83b37800c90 ]--- [525970.013367] BTRFS info (device sda4): leaf 232030208 total ptrs 183 free spa Version-Release number of selected component (if applicable): Can't fetch anymore, the system boots with read-only. However, a similar system shows btrfs-progs.x86_64 4.6.1-1.fc25 @anaconda How reproducible: Seen at least 4 times on 3 different disks and 2 different systems. Steps to Reproduce: 1. Select BTRFS for the boot disk during Fedora 25 system install 2. Work on the disk for long enough 3. Wait until you get mysterious messages Actual results: System starts showing "bad tree block" messages, the disk becomes read-only. the system becomes unusable. Expected results: No error unless some major disk I/O error occurred. And even then, being able to detect errors is relatively unhelpful without the ability to repair them. Additional info: See attached log.
I would suggest reporting this to the upstream mailing list. -Eric
While attempting to repair the disk, I run into https://bugzilla.redhat.com/show_bug.cgi?id=1435567. See comments there for what I tried.
(In reply to Eric Sandeen from comment #1) > I would suggest reporting this to the upstream mailing list. It has been reported. https://www.mail-archive.com/linux-btrfs@vger.kernel.org/msg63526.html. Thanks.
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