Hi all,
My server streams music and I recently found the need to tag a lot of
flac files automatically, this tagging process now triggers something
in btrfs (which I only recently started to use). Below is the system
information.
I've looked whether my 8 concurrent writes were causing the issues or
the sheer amount of data, even if I run only one metaflac instance at
a time, this will still trigger.
Daniel
# uname -a
Linux sakuya 4.0.2-gentoo-2-default #1 SMP Thu May 14 02:50:16 CEST
2015 x86_64 AMD FX(tm)-8320 Eight-Core Processor AuthenticAMD
GNU/Linux
# btrfs --version
btrfs-progs v4.0
# btrfs fi show
Label: none uuid: f956cfd2-e851-42be-8943-d924c6c6e4e4
Total devices 1 FS bytes used 2.73TiB
devid 1 size 3.64TiB used 2.73TiB path /dev/sdd
# btrfs fi df /storage/media-files3
Data, single: total=2.73TiB, used=2.73TiB
System, single: total=32.00MiB, used=320.00KiB
Metadata, single: total=4.00GiB, used=2.97GiB
GlobalReserve, single: total=512.00MiB, used=0.00B
# dmesg
[372349.284091] BTRFS info (device sdd): disk space caching is enabled
[372668.321999] ------------[ cut here ]------------
[372668.322060] WARNING: CPU: 1 PID: 23395 at fs/btrfs/super.c:260
__btrfs_abort_transaction+0x5f/0x130 [btrfs]()
[372668.322147] BTRFS: Transaction aborted (error -95)
[372668.322152] Modules linked in: btrfs xor raid6_pq binfmt_misc
af_packet ipt_REJECT nf_reject_ipv4 xt_conntrack iptable_filter
ipt_MASQUERADE nf_nat_masquerade_ipv4 xt_nat xt_tcpudp iptable_nat
nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack
bridge stp llc ip_tables x_tables joydev hid_generic usbhid xhci_pci
xhci_hcd ohci_pci snd_hda_codec_via snd_hda_codec_generic ehci_pci
snd_hda_codec_hdmi ohci_hcd ehci_hcd usbcore snd_hda_intel
snd_hda_controller snd_hda_codec kvm_amd kvm snd_hwdep
crct10dif_pclmul snd_pcm crc32_pclmul crc32c_intel ppdev
ghash_clmulni_intel aesni_intel aes_x86_64 lrw snd_timer e1000
gf128mul glue_helper r8169 ablk_helper snd parport_pc mii cryptd
serio_raw parport shpchp pcspkr edac_core sp5100_tco usb_common button
fam15h_power wmi i2c_piix4 edac_mce_amd soundcore
[372668.322610] k10temp asus_atk0110 acpi_cpufreq processor sch_fq_codel
[372668.322652] CPU: 1 PID: 23395 Comm: kworker/u16:3 Tainted: G
W 4.0.2-gentoo-2-default #1
[372668.322721] Hardware name: System manufacturer System Product
Name/M5A78L-M/USB3, BIOS 2001 09/11/2014
[372668.322803] Workqueue: btrfs-endio-write btrfs_endio_write_helper [btrfs]
[372668.322840] ffffffffa04bfe32 ffff8801e8937c08 ffffffff816edc91
0000000000000007
[372668.322911] ffff8801e8937c58 ffff8801e8937c48 ffffffff81056675
ffff8801e8937ce8
[372668.322986] ffff8803ad83fd28 00000000ffffffa1 ffff880147d2a800
ffffffffa04bea60
[372668.323058] Call Trace:
[372668.323097] [<ffffffff816edc91>] dump_stack+0x45/0x57
[372668.323134] [<ffffffff81056675>] warn_slowpath_common+0x95/0xe0
[372668.323171] [<ffffffff81056706>] warn_slowpath_fmt+0x46/0x50
[372668.323219] [<ffffffffa0454e65>] ? try_merge_map+0x45/0x150 [btrfs]
[372668.323261] [<ffffffffa040f46f>]
__btrfs_abort_transaction+0x5f/0x130 [btrfs]
[372668.323339] [<ffffffffa0447b82>]
btrfs_finish_ordered_io+0x552/0x5e0 [btrfs]
[372668.323418] [<ffffffffa0447e85>] finish_ordered_fn+0x15/0x20 [btrfs]
[372668.323466] [<ffffffffa046f168>] normal_work_helper+0xb8/0x2a0 [btrfs]
[372668.323515] [<ffffffffa046f4e2>] btrfs_endio_write_helper+0x12/0x20 [btrfs]
[372668.323552] [<ffffffff8106ed63>] process_one_work+0x153/0x410
[372668.323589] [<ffffffff8106f7bb>] worker_thread+0x6b/0x480
[372668.323693] [<ffffffff8106f750>] ? rescuer_thread+0x300/0x300
[372668.323730] [<ffffffff8107473b>] kthread+0xdb/0x100
[372668.323767] [<ffffffff81074660>] ? kthread_create_on_node+0x190/0x190
[372668.323805] [<ffffffff816f4218>] ret_from_fork+0x58/0x90
[372668.323845] [<ffffffff81074660>] ? kthread_create_on_node+0x190/0x190
[372668.323885] ---[ end trace c0894b8b0ebe359e ]---
[372668.323925] BTRFS: error (device sdd) in
btrfs_finish_ordered_io:2896: errno=-95 unknown
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