Sirs,
my recently slowing file system is now going read only after trying a
defrag or other operation. I'm wondering whether this is the result of
a hardware failure or a btrfs or some other issue. Output of dmesg:
127.750401] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
[ 127.750494] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7:
0000000000000400
[ 127.750590] Process btrfs-cleaner (pid: 1346, threadinfo
ffff8800687ec000, task ffff88006d742a00)
[ 127.750704] Stack:
[ 127.750733] ffff880068024c38 ffff88006a9a0438 ffff8800687ede48
ffff880069928800
[ 127.750850] ffff88006d742a00 ffff88006d742a00 ffff88006d742a00
0000000000000000
[ 127.750968] ffff8800687edeb8 ffffffff812b8c29 ffff880069928800
0000000000000000
[ 127.751085] Call Trace:
[ 127.751122] [<ffffffff812b8c29>] cleaner_kthread+0xa9/0x120
[ 127.751200] [<ffffffff812b8b80>] ? write_dev_flush.part.107+0xc0/0xc0
[ 127.751289] [<ffffffff81069450>] kthread+0xc0/0xd0
[ 127.751354] [<ffffffff81069390>] ? kthread_create_on_node+0x130/0x130
[ 127.751444] [<ffffffff816976dc>] ret_from_fork+0x7c/0xb0
[ 127.751516] [<ffffffff81069390>] ? kthread_create_on_node+0x130/0x130
[ 127.751602] Code: 44 28 3f 85 c0 7f 83 31 d2 31 f6 4c 89 ff e8 f7 c5
fe ff eb 84 0f 1f 44 00 00 48 83 c4 18 31 c0 5b 41 5c 41 5d 41 5e 41 5f
5d c3 <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 66 66 66 66 90 48
[ 127.752207] RIP [<ffffffff812c1611>]
btrfs_clean_old_snapshots+0x131/0x140
[ 127.752305] RSP <ffff8800687ede38>
[ 127.752371] ---[ end trace cc41fa39a41b468e ]---
[ 127.862825] btrfs: corrupt leaf, bad key order:
block=2837196627968,root=1, slot=121
[ 127.862938] ------------[ cut here ]------------
[ 127.863009] WARNING: at fs/btrfs/super.c:255
__btrfs_abort_transaction+0xdf/0x100()
[ 127.863110] Hardware name: System Product Name
[ 127.863171] btrfs: Transaction aborted
[ 127.863222] Modules linked in: usblp pl2303 usbserial hid_generic
usbhid hid usb_storage lp ppdev parport_pc parport snd_hda_codec_via
sp5100_tco acpi_cpufreq mperf freq_table kvm_amd kvm evdev radeon ttm
drm_kms_helper psmouse drm serio_raw agpgart i2c_algo_bit microcode
snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_page_alloc i2c_piix4
snd_timer snd atl1e ohci_hcd via_rhine i2c_core shpchp soundcore
ehci_pci ehci_hcd mii wmi k10temp asus_atk0110 processor thermal_sys
hwmon button
[ 127.864073] Pid: 1347, comm: btrfs-transacti Tainted: G D 3.9.3 #1
[ 127.864167] Call Trace:
[ 127.864204] [<ffffffff8104614f>] warn_slowpath_common+0x7f/0xc0
[ 127.864285] [<ffffffff81046246>] warn_slowpath_fmt+0x46/0x50
[ 127.864370] [<ffffffff812962ef>] __btrfs_abort_transaction+0xdf/0x100
[ 127.864460] [<ffffffff812a71f2>] __btrfs_free_extent+0x242/0x870
[ 127.864543] [<ffffffff813046bc>] ? btrfs_merge_delayed_refs+0x1fc/0x3c0
[ 127.870518] [<ffffffff812ab59b>] run_clustered_refs+0x50b/0xc40
[ 127.876503] [<ffffffff81303813>] ? find_ref_head+0x83/0xf0
[ 127.882501] [<ffffffff812af6b0>] btrfs_run_delayed_refs+0xe0/0x570
[ 127.882503] [<ffffffff812bfb9a>] btrfs_commit_transaction+0xea/0xad0
[ 127.882505] [<ffffffff81069b90>] ? finish_wait+0x80/0x80
[ 127.882513] [<ffffffff812b8605>] transaction_kthread+0x1a5/0x220
[ 127.882517] [<ffffffff812b8460>] ?
btree_readpage_end_io_hook+0x2a0/0x2a0
[ 127.882520] [<ffffffff81069450>] kthread+0xc0/0xd0
[ 127.882521] [<ffffffff81069390>] ? kthread_create_on_node+0x130/0x130
[ 127.882523] [<ffffffff816976dc>] ret_from_fork+0x7c/0xb0
[ 127.882524] [<ffffffff81069390>] ? kthread_create_on_node+0x130/0x130
[ 127.882525] ---[ end trace cc41fa39a41b468f ]---
[ 127.882527] BTRFS error (device sdb) in __btrfs_free_extent:5394: IO
failure
[ 127.882528] btrfs: run_one_delayed_ref returned -5
[ 127.882529] BTRFS error (device sdb) in btrfs_run_delayed_refs:2565:
IO failure
Not that I've done anything other than a cursory check but it looks like
the read only data is fine.
Pete
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