kernel warning with QoS enabled

[wongsyrone]

[ 1284.268200] ------------[ cut here ]------------
[ 1284.272909] WARNING: CPU: 1 PID: 0 at net/sched/sch_hfsc.c:1429 hfsc_dequeue+0x194/0x554 [sch_hfsc]()
[ 1284.282202] Modules linked in: ifb pppoe ppp_async iptable_nat ath9k pppox ppp_generic nf_nat_pptp nf_nat_ipv4 nf_nat_amanda nf_conntrack_pptp nf_conntrack_ipv6 nf_conntrack_ipv4 nf_conntrack_amanda ipt_REJECT ipt_MASQUERADE ath9k_common xt_time xt_tcpudp xt_tcpmss xt_string xt_statistic xt_state xt_socket xt_recent xt_quota xt_pkttype xt_owner xt_nat xt_multiport xt_mark xt_mac xt_limit xt_length xt_id xt_hl xt_helper xt_ecn xt_dscp xt_conntrack xt_connmark xt_connlimit xt_connbytes xt_comment xt_addrtype xt_TPROXY xt_TCPMSS xt_REDIRECT xt_NETMAP xt_LOG xt_HL xt_DSCP xt_CT xt_CLASSIFY ums_usbat ums_sddr55 ums_sddr09 ums_karma ums_jumpshot ums_isd200 ums_freecom ums_datafab ums_cypress ums_alauda ts_kmp ts_fsm ts_bm slhc nf_reject_ipv4 nf_nat_tftp nf_nat_snmp_basic nf_nat_sip nf_nat_redirect nf_nat_proto_gre nf_nat_masquerade_ipv4 nf_nat_irc nf_nat_h323 nf_nat_ftp nf_nat nf_log_ipv4 nf_defrag_ipv6 nf_defrag_ipv4 nf_conntrack_tftp nf_conntrack_snmp nf_conntrack_sip nf_conntrack_rtcache nf_conntrack_proto_gre nf_conntrack_irc nf_conntrack_h323 nf_conntrack_ftp nf_conntrack_broadcast libcrc32c iptable_raw iptable_mangle iptable_filter ipt_ECN ip_tables crc_ccitt ath9k_hw ath armada_thermal act_connmark nf_conntrack act_skbedit act_mirred em_u32 cls_u32 cls_tcindex cls_flow cls_route cls_fw sch_hfsc sch_ingress tmp421 pwm_fan thermal_sys hwmon i2c_mv64xxx i2c_dev mwlwifi mac80211 cfg80211 compat ledtrig_usbdev xt_set ip_set_list_set ip_set_hash_netiface ip_set_hash_netport ip_set_hash_netnet ip_set_hash_net ip_set_hash_netportnet ip_set_hash_mac ip_set_hash_ipportnet ip_set_hash_ipportip ip_set_hash_ipport ip_set_hash_ipmark ip_set_hash_ip ip_set_bitmap_port ip_set_bitmap_ipmac ip_set_bitmap_ip ip_set nfnetlink ip6t_REJECT nf_reject_ipv6 nf_log_ipv6 nf_log_common ip6table_raw ip6table_mangle ip6table_filter ip6_tables x_tables snd_compress snd_pcm_oss snd_mixer_oss snd_pcm snd_timer snd_rawmidi snd_seq_device snd_hwdep snd soundcore vfat fat nls_utf8 nls_cp936 nls_cp932 regmap_spi regmap_mmio usb_storage leds_tlc591xx regmap_i2c i2c_core xhci_plat_hcd xhci_pci xhci_hcd uhci_hcd ohci_platform ohci_hcd sata_mv libata ehci_orion ehci_platform ehci_hcd sd_mod scsi_mod gpio_button_hotplug ext4 jbd2 mbcache btrfs xor raid6_pq usbcore nls_base usb_common crc32c_generic crypto_hash [last unloaded: ifb]
[ 1284.488944] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.4.2 #1
[ 1284.494804] Hardware name: Marvell Armada 370/XP (Device Tree)
[ 1284.500658] Backtrace: 
[ 1284.503151] [<c001dbe4>] (dump_backtrace) from [<c001ddec>] (show_stack+0x18/0x1c)
[ 1284.510748]  r7:bf4e038c r6:60000153 r5:c0523f78 r4:00000000
[ 1284.516503] [<c001ddd4>] (show_stack) from [<c01b087c>] (dump_stack+0x94/0xa8)
[ 1284.523769] [<c01b07e8>] (dump_stack) from [<c002a1ac>] (warn_slowpath_common+0x9c/0xb8)
[ 1284.531886]  r7:bf4e038c r6:00000595 r5:00000009 r4:00000000
[ 1284.537638] [<c002a110>] (warn_slowpath_common) from [<c002a2b4>] (warn_slowpath_null+0x24/0x2c)
[ 1284.546451]  r8:c14a8108 r7:00000004 r6:ac0da0c0 r5:00000000 r4:00000000
[ 1284.553307] [<c002a290>] (warn_slowpath_null) from [<bf4e038c>] (hfsc_dequeue+0x194/0x554 [sch_hfsc])
[ 1284.562585] [<bf4e01f8>] (hfsc_dequeue [sch_hfsc]) from [<c02dcae8>] (__qdisc_run+0xc8/0x1a0)
[ 1284.571139]  r10:cf85e018 r9:0000003f r8:00000000 r7:ce0c3000 r6:ce0c3000 r5:00000001
[ 1284.579074]  r4:c14a8000
[ 1284.581652] [<c02dca20>] (__qdisc_run) from [<c02baa30>] (net_tx_action+0xec/0x168)
[ 1284.589335]  r10:cf85e000 r9:00000100 r8:40000002 r7:cf85fe10 r6:c05154c0 r5:00000000
[ 1284.597272]  r4:c14a8000
[ 1284.599847] [<c02ba944>] (net_tx_action) from [<c002d3f8>] (__do_softirq+0x100/0x230)
[ 1284.607704]  r9:00000100 r8:40000002 r7:c0518080 r6:c0518088 r5:00000002 r4:00000000
[ 1284.615564] [<c002d2f8>] (__do_softirq) from [<c002d7dc>] (irq_exit+0xa0/0xb0)
[ 1284.622811]  r10:cfde0118 r9:0000012b r8:cf808000 r7:00000001 r6:00000000 r5:00000000
[ 1284.630746]  r4:c0512fd4
[ 1284.633320] [<c002d73c>] (irq_exit) from [<c00663c4>] (__handle_domain_irq+0xa4/0xb4)
[ 1284.641176]  r5:00000000 r4:c0512fd4
[ 1284.644806] [<c0066320>] (__handle_domain_irq) from [<c00094d8>] (armada_370_xp_handle_irq+0x54/0xb8)
[ 1284.654056]  r9:0000012b r8:c055ad50 r7:c055ad38 r6:cf85ff08 r5:c055ad50 r4:c0290684
[ 1284.661918] [<c0009484>] (armada_370_xp_handle_irq) from [<c000a6b4>] (__irq_svc+0x54/0x70)
[ 1284.670298] Exception stack(0xcf85ff08 to 0xcf85ff50)
[ 1284.675379] ff00:                   00000000 fffffffa 0f8cc000 cfde0c00 c05183c8 00000002
[ 1284.683596] ff20: 0021de0a 0000012b 03452c73 0000012b cfde0118 cf85ff9c cf85ff58 cf85ff58
[ 1284.691807] ff40: c0290818 c0290684 20000153 ffffffff
[ 1284.696878]  r10:cfde0118 r9:0000012b r8:03452c73 r7:cf85ff3c r6:ffffffff r5:20000153
[ 1284.704812]  r4:c0290684 r3:c0290818
[ 1284.708457] [<c0290548>] (cpuidle_enter_state) from [<c0290870>] (cpuidle_enter+0x1c/0x20)
[ 1284.716750]  r10:c0514110 r9:c0465b2c r8:cf85ffb0 r7:c0533024 r6:cfde0118 r5:c0518498
[ 1284.724685]  r4:cf85e000
[ 1284.727263] [<c0290854>] (cpuidle_enter) from [<c005ec00>] (cpu_startup_entry+0x1c4/0x230)
[ 1284.735572] [<c005ea3c>] (cpu_startup_entry) from [<c001fcf4>] (secondary_start_kernel+0x150/0x158)
[ 1284.744647]  r7:c05393d8
[ 1284.747213] [<c001fba4>] (secondary_start_kernel) from [<0000966c>] (0x966c)
[ 1284.754285]  r5:00000051 r4:0f84406a
[ 1284.757939] ---[ end trace eb20bb8f7ed5be32 ]---

[wongsyrone]

ref: http://processors.wiki.ti.com/index.php/Enabling_Stack_Dumping_in_Linux_Kernel https://wiki.ubuntu.com/Kernel/KernelDebuggingTricks

[wongsyrone]

Switched to SQM, closing