Hi list,
while i didn't had the problem for some month i'm now getting ENOSPC on
a regular basis on one host.
It would be great if someone can help me debugging this.
Some basic informations:
# touch /vmbackup/abc
touch: cannot touch `/vmbackup/abc': No space left on device
# df -h /vmbackup/
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/stripe0-vmbackup 37T 28T 8,5T 77% /vmbackup
# btrfs filesystem df /vmbackup/
Data, single: total=27.87TiB, used=27.39TiB
System, DUP: total=8.00MiB, used=4.34MiB
Metadata, DUP: total=286.50GiB, used=199.91GiB
GlobalReserve, single: total=512.00MiB, used=0.00B
# btrfs filesystem show /vmbackup/
Label: none uuid: c8c3abf7-8280-4baa-bb51-a8c599e48002
Total devices 1 FS bytes used 27.59TiB
devid 1 size 36.38TiB used 28.43TiB path
/dev/mapper/stripe0-vmbackup
# mount | grep vmbackup
/dev/mapper/stripe0-vmbackup on /vmbackup type btrfs
(rw,noatime,compress-force=zlib,nossd,noacl,space_cache=v2,clear_cache,commit=300,subvolid=5,subvol=/)
dmesg is empty.
if i umount the volume i get traces (i already did a clear_cache 4 days
ago to recalculate the space_tree):
[545031.675797] ------------[ cut here ]------------
[545031.725166] WARNING: CPU: 1 PID: 17711 at
fs/btrfs/extent-tree.c:5710 btrfs_free_block_groups+0x35a/0x400 [btrfs]()
[545031.778329] Modules linked in: netconsole ipt_REJECT nf_reject_ipv4
mpt3sas raid_class scsi_transport_sas xt_multiport iptable_filter
ip_tables x_tables 8021q garp bonding coretemp loop i40e(O) vxlan
ip6_udp_tunnel usbhid udp_tunnel sb_edac ehci_pci edac_core ehci_hcd
i2c_i801 i2c_core usbcore shpchp usb_common ipmi_si ipmi_msghandler
button btrfs dm_mod raid1 raid456 async_raid6_recov async_memcpy
async_pq async_xor async_tx xor raid6_pq md_mod ixgbe mdio sg sd_mod
ahci ptp libahci megaraid_sas pps_core
[545032.081037] CPU: 1 PID: 17711 Comm: umount Tainted: G O
4.4.15+43-ph #1
[545032.145078] Hardware name: Supermicro X10DRH/X10DRH-iT, BIOS 1.0c
02/18/2015
[545032.210238] 0000000000000000 ffff88010c40bcd8 ffffffffbd3c712f
0000000000000000
[545032.275650] ffffffffc03ec603 ffff88010c40bd18 ffffffffbd0837e7
00000047a0000000
[545032.341525] 0000000000000000 ffff88105e0ea400 ffff881054a76088
ffff881054a76000
[545032.408500] Call Trace:
[545032.475272] [<ffffffffbd3c712f>] dump_stack+0x63/0x84
[545032.543620] [<ffffffffbd0837e7>] warn_slowpath_common+0x97/0xe0
[545032.612900] [<ffffffffbd08384a>] warn_slowpath_null+0x1a/0x20
[545032.682026] [<ffffffffc034a17a>]
btrfs_free_block_groups+0x35a/0x400 [btrfs]
[545032.750297] [<ffffffffc035ba4b>] close_ctree+0x15b/0x330 [btrfs]
[545032.817085] [<ffffffffc03291f9>] btrfs_put_super+0x19/0x20 [btrfs]
[545032.883439] [<ffffffffbd1cd33f>] generic_shutdown_super+0x6f/0x100
[545032.949302] [<ffffffffbd1cd866>] kill_anon_super+0x16/0x30
[545033.014327] [<ffffffffc032f96a>] btrfs_kill_super+0x1a/0xb0 [btrfs]
[545033.079031] [<ffffffffbd1cda31>] deactivate_locked_super+0x51/0x90
[545033.143275] [<ffffffffbd1ce42e>] deactivate_super+0x4e/0x70
[545033.206535] [<ffffffffbd1e9373>] cleanup_mnt+0x43/0x90
[545033.268842] [<ffffffffbd1e9412>] __cleanup_mnt+0x12/0x20
[545033.331629] [<ffffffffbd09ef8e>] task_work_run+0x7e/0xa0
[545033.393350] [<ffffffffbd07e550>] exit_to_usermode_loop+0x66/0x95
[545033.454685] [<ffffffffbd002a56>] syscall_return_slowpath+0xa6/0xf0
[545033.515485] [<ffffffffbd6b6f4c>] int_ret_from_sys_call+0x25/0x8f
[545033.575890] ---[ end trace bd985b05cc90617c ]---
[545033.636708] ------------[ cut here ]------------
[545033.696339] WARNING: CPU: 1 PID: 17711 at
fs/btrfs/extent-tree.c:5711 btrfs_free_block_groups+0x3f4/0x400 [btrfs]()
[545033.758031] Modules linked in: netconsole ipt_REJECT nf_reject_ipv4
mpt3sas raid_class scsi_transport_sas xt_multiport iptable_filter
ip_tables x_tables 8021q garp bonding coretemp loop i40e(O) vxlan
ip6_udp_tunnel usbhid udp_tunnel sb_edac ehci_pci edac_core ehci_hcd
i2c_i801 i2c_core usbcore shpchp usb_common ipmi_si ipmi_msghandler
button btrfs dm_mod raid1 raid456 async_raid6_recov async_memcpy
async_pq async_xor async_tx xor raid6_pq md_mod ixgbe mdio sg sd_mod
ahci ptp libahci megaraid_sas pps_core
[545034.095188] CPU: 1 PID: 17711 Comm: umount Tainted: G W O
4.4.15+43-ph #1
[545034.166070] Hardware name: Supermicro X10DRH/X10DRH-iT, BIOS 1.0c
02/18/2015
[545034.236259] 0000000000000000 ffff88010c40bcd8 ffffffffbd3c712f
0000000000000000
[545034.307690] ffffffffc03ec603 ffff88010c40bd18 ffffffffbd0837e7
00000047a0000000
[545034.379596] 0000000000000000 ffff88105e0ea400 ffff881054a76088
ffff881054a76000
[545034.452542] Call Trace:
[545034.525286] [<ffffffffbd3c712f>] dump_stack+0x63/0x84
[545034.599643] [<ffffffffbd0837e7>] warn_slowpath_common+0x97/0xe0
[545034.674894] [<ffffffffbd08384a>] warn_slowpath_null+0x1a/0x20
[545034.750338] [<ffffffffc034a214>]
btrfs_free_block_groups+0x3f4/0x400 [btrfs]
[545034.826354] [<ffffffffc035ba4b>] close_ctree+0x15b/0x330 [btrfs]
[545034.900758] [<ffffffffc03291f9>] btrfs_put_super+0x19/0x20 [btrfs]
[545034.973612] [<ffffffffbd1cd33f>] generic_shutdown_super+0x6f/0x100
[545035.044589] [<ffffffffbd1cd866>] kill_anon_super+0x16/0x30
[545035.113505] [<ffffffffc032f96a>] btrfs_kill_super+0x1a/0xb0 [btrfs]
[545035.180769] [<ffffffffbd1cda31>] deactivate_locked_super+0x51/0x90
[545035.246451] [<ffffffffbd1ce42e>] deactivate_super+0x4e/0x70
[545035.311231] [<ffffffffbd1e9373>] cleanup_mnt+0x43/0x90
[545035.374958] [<ffffffffbd1e9412>] __cleanup_mnt+0x12/0x20
[545035.437806] [<ffffffffbd09ef8e>] task_work_run+0x7e/0xa0
[545035.500554] [<ffffffffbd07e550>] exit_to_usermode_loop+0x66/0x95
[545035.563108] [<ffffffffbd002a56>] syscall_return_slowpath+0xa6/0xf0
[545035.625033] [<ffffffffbd6b6f4c>] int_ret_from_sys_call+0x25/0x8f
[545035.686864] ---[ end trace bd985b05cc90617d ]---
[545035.748727] ------------[ cut here ]------------
[545035.810850] WARNING: CPU: 1 PID: 17711 at
fs/btrfs/extent-tree.c:9990 btrfs_free_block_groups+0x2a4/0x400 [btrfs]()
[545035.875894] Modules linked in: netconsole ipt_REJECT nf_reject_ipv4
mpt3sas raid_class scsi_transport_sas xt_multiport iptable_filter
ip_tables x_tables 8021q garp bonding coretemp loop i40e(O) vxlan
ip6_udp_tunnel usbhid udp_tunnel sb_edac ehci_pci edac_core ehci_hcd
i2c_i801 i2c_core usbcore shpchp usb_common ipmi_si ipmi_msghandler
button btrfs dm_mod raid1 raid456 async_raid6_recov async_memcpy
async_pq async_xor async_tx xor raid6_pq md_mod ixgbe mdio sg sd_mod
ahci ptp libahci megaraid_sas pps_core
[545036.227082] CPU: 1 PID: 17711 Comm: umount Tainted: G W O
4.4.15+43-ph #1
[545036.300440] Hardware name: Supermicro X10DRH/X10DRH-iT, BIOS 1.0c
02/18/2015
[545036.374617] 0000000000000000 ffff88010c40bcd8 ffffffffbd3c712f
0000000000000000
[545036.449929] ffffffffc03ec603 ffff88010c40bd18 ffffffffbd0837e7
ffff88105e112c30
[545036.525514] 0000000000000038 0000000000000000 ffff88105e0ea888
ffff881054a76000
[545036.601698] Call Trace:
[545036.677124] [<ffffffffbd3c712f>] dump_stack+0x63/0x84
[545036.753379] [<ffffffffbd0837e7>] warn_slowpath_common+0x97/0xe0
[545036.829845] [<ffffffffbd08384a>] warn_slowpath_null+0x1a/0x20
[545036.905507] [<ffffffffc034a0c4>]
btrfs_free_block_groups+0x2a4/0x400 [btrfs]
[545036.981923] [<ffffffffc035ba4b>] close_ctree+0x15b/0x330 [btrfs]
[545037.056759] [<ffffffffc03291f9>] btrfs_put_super+0x19/0x20 [btrfs]
[545037.130024] [<ffffffffbd1cd33f>] generic_shutdown_super+0x6f/0x100
[545037.201434] [<ffffffffbd1cd866>] kill_anon_super+0x16/0x30
[545037.270737] [<ffffffffc032f96a>] btrfs_kill_super+0x1a/0xb0 [btrfs]
[545037.338382] [<ffffffffbd1cda31>] deactivate_locked_super+0x51/0x90
[545037.404449] [<ffffffffbd1ce42e>] deactivate_super+0x4e/0x70
[545037.469597] [<ffffffffbd1e9373>] cleanup_mnt+0x43/0x90
[545037.533686] [<ffffffffbd1e9412>] __cleanup_mnt+0x12/0x20
[545037.596915] [<ffffffffbd09ef8e>] task_work_run+0x7e/0xa0
[545037.660027] [<ffffffffbd07e550>] exit_to_usermode_loop+0x66/0x95
[545037.722960] [<ffffffffbd002a56>] syscall_return_slowpath+0xa6/0xf0
[545037.785270] [<ffffffffbd6b6f4c>] int_ret_from_sys_call+0x25/0x8f
[545037.847443] ---[ end trace bd985b05cc90617e ]---
[545037.909700] BTRFS: space_info 4 has 18446743523026157568 free, is
not full
[545037.973447] BTRFS: space_info total=307627032576, used=214654500864,
pinned=0, reserved=0, may_use=643655794688, readonly=131072
The workload on the FS is basically:
- Write file1 (50GB - 500GB)
- cp --reflink=always file1 to file2
- apply changes to file2 (100MB - 5GB)
- cp --reflink=always file2 to file3
- apply changes to file3 (100MB - 5GB)
...
- delete file1
- cp --reflink=always file3 to file4
- apply changes to file4 (100MB - 5GB)
- delete file2
...
And this for around 300 files a day. btrfs balance with dusage=5 and
musage=5 is running daily.
The kernel is something special - i'm using this one from holger:
https://github.com/hhoffstaette/kernel-patches
which is basically a 4.4.15 + several patches especially a lot of btrfs
patches up to 4.8 i think.
Greets,
Stefan
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