camel:

Model: ZBT-WG3526 (32M)
Architecture: MediaTek MT7621 ver:1 eco:3
Firmware Version: OpenWrt SNAPSHOT r10497-f1875e902d / LuCI Master (git-19.193.31361-7c9d845)
Kernel Version: 4.14.132
version: LuCI Master (git-19.193.31361-7c9d845) / OpenWrt SNAPSHOT r10497-f1875e902d

getting this per day around 2-3 times :( but snce a longer while ...) not sure, if already reported, and not sure, if that is maybe a problem of QOS ?

sch_generic.c

QOS is installed via:
#traffic shaping:
#############################
opkg install tc luci-app-sqm sqm-scripts kmod-sched-cake

Fri Jul 19 05:58:52 2019 kern.warn kernel: [49182.719599] ------------[ cut here ]------------
Fri Jul 19 05:58:52 2019 kern.warn kernel: [49182.724269] WARNING: CPU: 2 PID: 0 at net/sched/sch_generic.c:320 dev_watchdog+0x1ac/0x324
Fri Jul 19 05:58:52 2019 kern.info kernel: [49182.732539] NETDEV WATCHDOG: eth0 (mtk_soc_eth): transmit queue 0 timed out
Fri Jul 19 05:58:52 2019 kern.warn kernel: [49182.739475] Modules linked in: pppoe ppp_async option usb_wwan pptp pppox ppp_mppe ppp_generic nf_nat_pptp nf_conntrack_pptp nf_conntrack_ipv6 mt76x2e mt76x2_common mt76x02_lib mt7603e mt76 mac80211 iptable_nat ipt_REJECT ipt_MASQUERADE cfg80211 xt_time xt_tcpudp xt_tcpmss xt_statistic xt_state xt_recent xt_nat xt_multiport xt_mark xt_mac xt_limit xt_length xt_hl xt_helper xt_ecn xt_dscp xt_conntrack xt_connmark xt_connlimit xt_connbytes xt_comment xt_TCPMSS xt_REDIRECT xt_NETMAP xt_LOG xt_HL xt_FLOWOFFLOAD xt_DSCP xt_CT xt_CLASSIFY usbserial ts_fsm ts_bm slhc nf_reject_ipv4 nf_nat_tftp nf_nat_snmp_basic nf_nat_sip nf_nat_rtsp nf_nat_redirect nf_nat_proto_gre nf_nat_masquerade_ipv4 nf_nat_irc nf_conntrack_ipv4 nf_nat_ipv4 nf_nat_h323 nf_nat_amanda nf_nat nf_log_ipv4 nf_flow_table_hw nf_flow_table
Fri Jul 19 05:58:52 2019 kern.warn kernel: [49182.810045] nf_defrag_ipv6 nf_defrag_ipv4 nf_conntrack_tftp nf_conntrack_snmp nf_conntrack_sip nf_conntrack_rtsp nf_conntrack_rtcache nf_conntrack_proto_gre nf_conntrack_netlink nf_conntrack_irc nf_conntrack_h323 nf_conntrack_broadcast ts_kmp nf_conntrack_amanda nf_conntrack macvlan iptable_raw iptable_mangle iptable_filter ipt_ECN ip_tables crc_ccitt compat br_netfilter sch_tbf sch_ingress sch_htb sch_hfsc em_u32 cls_u32 cls_tcindex cls_route cls_matchall cls_fw cls_flow cls_basic act_skbedit act_mirred ledtrig_usbport xt_set ip_set_list_set ip_set_hash_netportnet ip_set_hash_netport ip_set_hash_netnet ip_set_hash_netiface ip_set_hash_net 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
Fri Jul 19 05:58:52 2019 kern.warn kernel: [49182.881294] ip_set nfnetlink nf_log_ipv6 nf_log_common ip6table_mangle ip6table_filter ip6_tables ip6t_REJECT x_tables nf_reject_ipv6 nfsv4 nfsv3 nfs ip_gre gre ifb ip_tunnel tun vfat fat lockd sunrpc grace dns_resolver dm_mirror dm_region_hash dm_log dm_crypt dm_mod dax nls_utf8 nls_iso8859_1 nls_cp437 sha1_generic ecb usb_storage ext4 mbcache jbd2 crc32c_generic mmc_block mtk_sd mmc_core leds_gpio xhci_plat_hcd xhci_pci xhci_mtk xhci_hcd ahci libahci libata sd_mod scsi_mod gpio_button_hotplug usbcore nls_base usb_common
Fri Jul 19 05:58:52 2019 kern.warn kernel: [49182.927764] CPU: 2 PID: 0 Comm: swapper/2 Not tainted 4.14.132 #0
Fri Jul 19 05:58:52 2019 kern.warn kernel: [49182.933840] Stack : 00000000 8ff4b540 80600000 80078ecc 80630000 805c9bd8 00000000 00000000
Fri Jul 19 05:58:52 2019 kern.warn kernel: [49182.942181] 80592d40 8fc0ddc4 8fc3cb0c 80606a47 8058db40 00000001 8fc0dd68 ac07f59d
Fri Jul 19 05:58:52 2019 kern.warn kernel: [49182.950522] 00000000 00000000 80780000 00008e08 00000000 0000019e 00000008 00000000
Fri Jul 19 05:58:52 2019 kern.warn kernel: [49182.958863] 00000000 80610000 000e2814 00000000 00000000 00000000 80630000 805c3a38
Fri Jul 19 05:58:52 2019 kern.warn kernel: [49182.967196] 803c7118 00000140 00000002 8ff4b540 00000000 802e6cb8 00000008 80770008
Fri Jul 19 05:58:52 2019 kern.warn kernel: [49182.975534] ...
Fri Jul 19 05:58:52 2019 kern.warn kernel: [49182.977976] Call Trace:
Fri Jul 19 05:58:52 2019 kern.warn kernel: [49182.980445] [<8000c8d0>] show_stack+0x58/0x100
Fri Jul 19 05:58:52 2019 kern.warn kernel: [49182.984897] [<804c57ac>] dump_stack+0x9c/0xe0
Fri Jul 19 05:58:52 2019 kern.warn kernel: [49182.989243] [<8002f9b8>] __warn+0xe0/0x138
Fri Jul 19 05:58:52 2019 kern.warn kernel: [49182.993323] [<8002fa40>] warn_slowpath_fmt+0x30/0x3c
Fri Jul 19 05:58:52 2019 kern.warn kernel: [49182.998279] [<803c7118>] dev_watchdog+0x1ac/0x324
Fri Jul 19 05:58:52 2019 kern.warn kernel: [49183.002966] [<8008ff4c>] call_timer_fn.isra.25+0x24/0x84
Fri Jul 19 05:58:52 2019 kern.warn kernel: [49183.008254] [<80090208>] run_timer_softirq+0x1bc/0x248
Fri Jul 19 05:58:52 2019 kern.warn kernel: [49183.013393] [<804e2a08>] __do_softirq+0x128/0x2ec
Fri Jul 19 05:58:52 2019 kern.warn kernel: [49183.018085] [<80034664>] irq_exit+0xac/0xc8
Fri Jul 19 05:58:52 2019 kern.warn kernel: [49183.022270] [<802947b0>] plat_irq_dispatch+0xfc/0x138
Fri Jul 19 05:58:52 2019 kern.warn kernel: [49183.027299] [<80007588>] except_vec_vi_end+0xb8/0xc4
Fri Jul 19 05:58:52 2019 kern.warn kernel: [49183.032243] [<80008f50>] r4k_wait_irqoff+0x1c/0x24
Fri Jul 19 05:58:52 2019 kern.warn kernel: [49183.037115] ---[ end trace fde9f407bd307871 ]---
Fri Jul 19 05:58:52 2019 kern.err kernel: [49183.041793] mtk_soc_eth 1e100000.ethernet eth0: transmit timed out
Fri Jul 19 05:58:52 2019 kern.info kernel: [49183.048004] mtk_soc_eth 1e100000.ethernet eth0: dma_cfg:80000065
Fri Jul 19 05:58:52 2019 kern.info kernel: [49183.054073] mtk_soc_eth 1e100000.ethernet eth0: tx_ring=0, base=0eb30000, max=0, ctx=3427, dtx=3427, fdx=3426, next=3427
Fri Jul 19 05:58:52 2019 kern.info kernel: [49183.064951] mtk_soc_eth 1e100000.ethernet eth0: rx_ring=0, base=0e2c0000, max=0, calc=3019, drx=3020
Fri Jul 19 05:58:53 2019 kern.info kernel: [49183.078139] mtk_soc_eth 1e100000.ethernet: 0x100 = 0x6060000c, 0x10c = 0x80818
Fri Jul 19 05:58:53 2019 kern.info kernel: [49183.091357] mtk_soc_eth 1e100000.ethernet: PPE started