FYI, still seeing this with 3.19:
[196992.429463] ------------[ cut here ]------------
[196992.429526] WARNING: CPU: 1 PID: 26328 at fs/btrfs/qgroup.c:1414
btrfs_delayed_qgroup_accounting+0x9f3/0xa0d [btrfs]()
[196992.429617] Modules linked in: xt_nat xt_tcpudp ipt_MASQUERADE
nf_nat_masquerade_ipv4 iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4
nf_nat_ipv4 nf_nat nf_conntrack ip_tables x_tables tun
cpufreq_conservative cpufreq_powersave cpufreq_stats ipv6 btrfs xor
raid6_pq zlib_deflate coretemp hwmon loop pcspkr i2c_i801 i2c_core
battery parport_pc parport tpm_infineon tpm_tis tpm video 8250_fintek
lpc_ich mfd_core ehci_pci ehci_hcd button acpi_cpufreq ext4 crc16 jbd2
mbcache raid1 sg sd_mod ahci libahci libata scsi_mod r8169 mii
[196992.429979] CPU: 1 PID: 26328 Comm: kworker/u16:21 Not tainted
3.19.0 #1
[196992.430026] Hardware name: System manufacturer System Product
Name/P8H77-M PRO, BIOS 1101 02/04/2013
[196992.430123] Workqueue: btrfs-extent-refs btrfs_extent_refs_helper
[btrfs]
[196992.430171] 0000000000000009 ffff8800045a3c18 ffffffff813bc952
0000000000000000
[196992.430260] 0000000000000000 ffff8800045a3c58 ffffffff8103b015
ffff8807f9281c90
[196992.430349] ffffffffa0332a33 ffff8807f9281000 ffff8807f2747f00
ffffffffffffffff
[196992.430438] Call Trace:
[196992.430484] [<ffffffff813bc952>] dump_stack+0x45/0x57
[196992.430532] [<ffffffff8103b015>] warn_slowpath_common+0x97/0xb1
[196992.430586] [<ffffffffa0332a33>] ?
btrfs_delayed_qgroup_accounting+0x9f3/0xa0d [btrfs]
[196992.430675] [<ffffffff8103b044>] warn_slowpath_null+0x15/0x17
[196992.430727] [<ffffffffa0332a33>]
btrfs_delayed_qgroup_accounting+0x9f3/0xa0d [btrfs]
[196992.430820] [<ffffffffa02d1449>] btrfs_run_delayed_refs+0x1e4/0x21b
[btrfs]
[196992.430873] [<ffffffffa02d1a2d>] delayed_ref_async_start+0x37/0x76
[btrfs]
[196992.430927] [<ffffffffa03069d7>] normal_work_helper+0xb5/0x16a
[btrfs]
[196992.430981] [<ffffffffa0306b98>] btrfs_extent_refs_helper+0xd/0xf
[btrfs]
[196992.431030] [<ffffffff8104c0cb>] process_one_work+0x187/0x2a9
[196992.431077] [<ffffffff8104c458>] worker_thread+0x241/0x33e
[196992.431125] [<ffffffff8104c217>] ?
process_scheduled_works+0x2a/0x2a
[196992.431173] [<ffffffff81050067>] kthread+0xcd/0xd5
[196992.431219] [<ffffffff8104ff9a>] ?
kthread_freezable_should_stop+0x43/0x43
[196992.431268] [<ffffffff813c12ac>] ret_from_fork+0x7c/0xb0
[196992.431315] [<ffffffff8104ff9a>] ?
kthread_freezable_should_stop+0x43/0x43
[196992.431363] ---[ end trace 5d57d07bb94831a0 ]---
[197051.336444] ------------[ cut here ]------------
[197051.336506] WARNING: CPU: 5 PID: 2544 at fs/btrfs/qgroup.c:1414
btrfs_delayed_qgroup_accounting+0x9f3/0xa0d [btrfs]()
[197051.336598] Modules linked in: xt_nat xt_tcpudp ipt_MASQUERADE
nf_nat_masquerade_ipv4 iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4
nf_nat_ipv4 nf_nat nf_conntrack ip_tables x_tables tun
cpufreq_conservative cpufreq_powersave cpufreq_stats ipv6 btrfs xor
raid6_pq zlib_deflate coretemp hwmon loop pcspkr i2c_i801 i2c_core
battery parport_pc parport tpm_infineon tpm_tis tpm video 8250_fintek
lpc_ich mfd_core ehci_pci ehci_hcd button acpi_cpufreq ext4 crc16 jbd2
mbcache raid1 sg sd_mod ahci libahci libata scsi_mod r8169 mii
[197051.336965] CPU: 5 PID: 2544 Comm: btrfs-cleaner Tainted: G W
3.19.0 #1
[197051.337070] Hardware name: System manufacturer System Product
Name/P8H77-M PRO, BIOS 1101 02/04/2013
[197051.337160] 0000000000000009 ffff8800c7e8bbe8 ffffffff813bc952
000000000000009b
[197051.337249] 0000000000000000 ffff8800c7e8bc28 ffffffff8103b015
ffff8807f9281c90
[197051.337338] ffffffffa0332a33 ffff8807f9281000 ffff8807f2740480
ffffffffffffffff
[197051.337427] Call Trace:
[197051.337473] [<ffffffff813bc952>] dump_stack+0x45/0x57
[197051.337521] [<ffffffff8103b015>] warn_slowpath_common+0x97/0xb1
[197051.337576] [<ffffffffa0332a33>] ?
btrfs_delayed_qgroup_accounting+0x9f3/0xa0d [btrfs]
[197051.337664] [<ffffffff8103b044>] warn_slowpath_null+0x15/0x17
[197051.337717] [<ffffffffa0332a33>]
btrfs_delayed_qgroup_accounting+0x9f3/0xa0d [btrfs]
[197051.337809] [<ffffffffa02d1449>] btrfs_run_delayed_refs+0x1e4/0x21b
[btrfs]
[197051.337863] [<ffffffffa02df041>]
btrfs_should_end_transaction+0x4a/0x53 [btrfs]
[197051.337955] [<ffffffffa02cfdc3>] btrfs_drop_snapshot+0x379/0x68f
[btrfs]
[197051.338009] [<ffffffffa02ee811>] ?
btrfs_run_defrag_inodes+0x2fa/0x30e [btrfs]
[197051.338101] [<ffffffffa02d22f2>] ?
btrfs_delete_unused_bgs+0x3f/0x210 [btrfs]
[197051.338193] [<ffffffffa02df42b>]
btrfs_clean_one_deleted_snapshot+0xb4/0xc2 [btrfs]
[197051.338284] [<ffffffffa02be105>] ? btrfs_free_path+0x22/0x26
[btrfs]
[197051.338336] [<ffffffffa02d889e>] cleaner_kthread+0x134/0x16c
[btrfs]
[197051.338388] [<ffffffffa02d876a>] ? btrfs_alloc_root+0x2c/0x2c
[btrfs]
[197051.338437] [<ffffffff81050067>] kthread+0xcd/0xd5
[197051.338484] [<ffffffff8104ff9a>] ?
kthread_freezable_should_stop+0x43/0x43
[197051.338533] [<ffffffff813c12ac>] ret_from_fork+0x7c/0xb0
[197051.338580] [<ffffffff8104ff9a>] ?
kthread_freezable_should_stop+0x43/0x43
[197051.338628] ---[ end trace 5d57d07bb94831a1 ]---
[197051.340365] ------------[ cut here ]------------
[197051.340450] WARNING: CPU: 0 PID: 26314 at fs/btrfs/qgroup.c:1414
btrfs_delayed_qgroup_accounting+0x9f3/0xa0d [btrfs]()
[197051.340568] Modules linked in: xt_nat xt_tcpudp ipt_MASQUERADE
nf_nat_masquerade_ipv4 iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4
nf_nat_ipv4 nf_nat nf_conntrack ip_tables x_tables tun
cpufreq_conservative cpufreq_powersave cpufreq_stats ipv6 btrfs xor
raid6_pq zlib_deflate coretemp hwmon loop pcspkr i2c_i801 i2c_core
battery parport_pc parport tpm_infineon tpm_tis tpm video 8250_fintek
lpc_ich mfd_core ehci_pci ehci_hcd button acpi_cpufreq ext4 crc16 jbd2
mbcache raid1 sg sd_mod ahci libahci libata scsi_mod r8169 mii
[197051.341053] CPU: 0 PID: 26314 Comm: kworker/u16:5 Tainted: G
W 3.19.0 #1
[197051.341165] Hardware name: System manufacturer System Product
Name/P8H77-M PRO, BIOS 1101 02/04/2013
[197051.341297] Workqueue: btrfs-extent-refs btrfs_extent_refs_helper
[btrfs]
[197051.341360] 0000000000000009 ffff8802c511bc18 ffffffff813bc952
0000000000000000
[197051.341475] 0000000000000000 ffff8802c511bc58 ffffffff8103b015
ffff8807f9281c90
[197051.341590] ffffffffa0332a33 ffff8807f9281000 ffff8807f2745300
ffffffffffffffff
[197051.341705] Call Trace:
[197051.341763] [<ffffffff813bc952>] dump_stack+0x45/0x57
[197051.341825] [<ffffffff8103b015>] warn_slowpath_common+0x97/0xb1
[197051.341901] [<ffffffffa0332a33>] ?
btrfs_delayed_qgroup_accounting+0x9f3/0xa0d [btrfs]
[197051.342015] [<ffffffff8103b044>] warn_slowpath_null+0x15/0x17
[197051.342089] [<ffffffffa0332a33>]
btrfs_delayed_qgroup_accounting+0x9f3/0xa0d [btrfs]
[197051.342214] [<ffffffffa02d1449>] btrfs_run_delayed_refs+0x1e4/0x21b
[btrfs]
[197051.342287] [<ffffffffa02d1a2d>] delayed_ref_async_start+0x37/0x76
[btrfs]
[197051.342365] [<ffffffffa03069d7>] normal_work_helper+0xb5/0x16a
[btrfs]
[197051.342441] [<ffffffffa0306b98>] btrfs_extent_refs_helper+0xd/0xf
[btrfs]
[197051.342506] [<ffffffff8104c0cb>] process_one_work+0x187/0x2a9
[197051.342568] [<ffffffff8104c458>] worker_thread+0x241/0x33e
[197051.342630] [<ffffffff8104c217>] ?
process_scheduled_works+0x2a/0x2a
[197051.342694] [<ffffffff81050067>] kthread+0xcd/0xd5
[197051.342755] [<ffffffff8104ff9a>] ?
kthread_freezable_should_stop+0x43/0x43
[197051.342819] [<ffffffff813c12ac>] ret_from_fork+0x7c/0xb0
[197051.342880] [<ffffffff8104ff9a>] ?
kthread_freezable_should_stop+0x43/0x43
[197051.342944] ---[ end trace 5d57d07bb94831a2 ]---
Tomasz Chmielewski
http://www.sslrack.com
On 2015-01-04 07:58, Tomasz Chmielewski wrote:
Got this with 3.18.1 and qgroups enabled. Not sure how to reproduce.
[1262648.802286] ------------[ cut here ]------------
[1262648.802350] WARNING: CPU: 1 PID: 2436 at fs/btrfs/qgroup.c:1414
btrfs_delayed_qgroup_accounting+0x9f1/0xa0b [btrfs]()
[1262648.802441] Modules linked in: ipt_MASQUERADE
nf_nat_masquerade_ipv4 iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4
nf_nat_ipv4 nf_nat nf_conntrack ip_tables x_tables cpufreq_ondemand
cpufreq_conservative cpufreq_powersave cpufreq_stats nfsd auth_rpcgss
oid_registry exportfs nfs_acl nfs lockd grace fscache sunrpc ipv6
btrfs xor raid6_pq zlib_deflate coretemp hwmon loop pcspkr i2c_i801
i2c_core battery parport_pc parport 8250_fintek tpm_infineon tpm_tis
tpm video ehci_pci ehci_hcd lpc_ich mfd_core acpi_cpufreq button ext4
crc16 jbd2 mbcache raid1 sg sd_mod r8169 mii ahci libahci libata
scsi_mod
[1262648.802854] CPU: 1 PID: 2436 Comm: btrfs-cleaner Not tainted
3.18.1 #1
[1262648.802902] Hardware name: System manufacturer System Product
Name/P8H77-M PRO, BIOS 1101 02/04/2013
[1262648.802992] 0000000000000009 ffff8800c805fbe8 ffffffff813b1128
0000000000000000
[1262648.803081] 0000000000000000 ffff8800c805fc28 ffffffff81039b39
ffff8807f341c000
[1262648.803170] ffffffffa0300be2 ffff8807f341c000 ffff8807f3fd8b40
ffffffffffffffff
[1262648.803259] Call Trace:
[1262648.803305] [<ffffffff813b1128>] dump_stack+0x46/0x58
[1262648.803352] [<ffffffff81039b39>] warn_slowpath_common+0x77/0x91
[1262648.803406] [<ffffffffa0300be2>] ?
btrfs_delayed_qgroup_accounting+0x9f1/0xa0b [btrfs]
[1262648.803495] [<ffffffff81039b68>] warn_slowpath_null+0x15/0x17
[1262648.803548] [<ffffffffa0300be2>]
btrfs_delayed_qgroup_accounting+0x9f1/0xa0b [btrfs]
[1262648.803642] [<ffffffffa02a12a5>]
btrfs_run_delayed_refs+0x1e4/0x21b [btrfs]
[1262648.803734] [<ffffffffa02aec96>]
btrfs_should_end_transaction+0x4a/0x53 [btrfs]
[1262648.803826] [<ffffffffa029fc34>] btrfs_drop_snapshot+0x379/0x68f
[btrfs]
[1262648.803881] [<ffffffffa02be478>] ?
btrfs_run_defrag_inodes+0x2fa/0x30e [btrfs]
[1262648.803974] [<ffffffffa02b0401>]
btrfs_clean_one_deleted_snapshot+0xb3/0xc2 [btrfs]
[1262648.804067] [<ffffffffa02a84ff>] cleaner_kthread+0x134/0x16c
[btrfs]
[1262648.804119] [<ffffffffa02a83cb>] ? btrfs_alloc_root+0x2c/0x2c
[btrfs]
[1262648.804169] [<ffffffff8104ebe7>] kthread+0xcd/0xd5
[1262648.804215] [<ffffffff8104eb1a>] ?
kthread_freezable_should_stop+0x43/0x43
[1262648.804264] [<ffffffff813b59ec>] ret_from_fork+0x7c/0xb0
[1262648.804311] [<ffffffff8104eb1a>] ?
kthread_freezable_should_stop+0x43/0x43
[1262648.804360] ---[ end trace b76fd72b4be63515 ]---
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