[FS#1170] mt7621: kernel errors - rcu_sched detected stalls on CPUs/tasks - again

Thu Jan 25 07:57:52 PST 2018

The following task has a new comment added:

FS#1170 - mt7621: kernel errors - rcu_sched detected stalls on CPUs/tasks - again
User who did this - leonardo c vargas (elphidium)

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having the same problem 
dir-860b1

OpenWrt SNAPSHOT r5938-6f425a28a4 / LuCI Master (git-18.023.74248-ee409b6)

Wed Jan 24 22:53:22 2018 kern.warn kernel: [ 7437.048845] ------------[ cut here ]------------
Wed Jan 24 22:53:22 2018 kern.warn kernel: [ 7437.058089] WARNING: CPU: 0 PID: 0 at net/sched/sch_generic.c:316 dev_watchdog+0x254/0x2f4
Wed Jan 24 22:53:22 2018 kern.info kernel: [ 7437.074592] NETDEV WATCHDOG: eth0 (mtk_soc_eth): transmit queue 0 timed out
Wed Jan 24 22:53:22 2018 kern.warn kernel: [ 7437.088469] Modules linked in: pppoe ppp_async uvcvideo pppox ppp_generic nf_conntrack_ipv6 mt76x2e 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_LOG xt_HL xt_DSCP xt_CLASSIFY videobuf2_v4l2 slhc nf_reject_ipv4 nf_nat_redirect nf_nat_masquerade_ipv4 nf_conntrack_ipv4 nf_nat_ipv4 nf_nat nf_log_ipv4 nf_defrag_ipv6 nf_defrag_ipv4 nf_conntrack_rtcache nf_conntrack_netlink iptable_mangle iptable_filter ipt_ECN ip_tables input_core crc_ccitt compat sch_cake nf_conntrack act_skbedit act_mirred em_u32 cls_u32 cls_tcindex cls_flow cls_route cls_fw sch_tbf sch_htb
Wed Jan 24 22:53:22 2018 kern.warn kernel: [ 7437.229054]  sch_hfsc sch_ingress videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common videodev ledtrig_usbport 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_mangle ip6table_filter ip6_tables x_tables ifb dma_shared_buffer leds_gpio xhci_mtk xhci_plat_hcd xhci_pci xhci_hcd gpio_button_hotplug usbcore nls_base usb_common
Wed Jan 24 22:53:22 2018 kern.warn kernel: [ 7437.340615] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.9.77 #0
Wed Jan 24 22:53:22 2018 kern.warn kernel: [ 7437.352378] Stack : 00000000 00000000 80527b4a 00000033 803e79e4 00000000 00000000 80520000
Wed Jan 24 22:53:22 2018 kern.warn kernel: [ 7437.369016]         804c81bc 804c7da7 80460564 00000000 00000000 80523824 ffffffff 00000200
Wed Jan 24 22:53:22 2018 kern.warn kernel: [ 7437.385651]         00200000 8006a9e8 00000001 80520000 804cdec4 804cdec8 80465170 87c0ddcc
Wed Jan 24 22:53:22 2018 kern.warn kernel: [ 7437.402289]         00000003 800a78a0 ffffffff 00000200 00200000 00000000 00000006 00c0ddcc
Wed Jan 24 22:53:22 2018 kern.warn kernel: [ 7437.418924]         00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
Wed Jan 24 22:53:22 2018 kern.warn kernel: [ 7437.435558]         ...
Wed Jan 24 22:53:22 2018 kern.warn kernel: [ 7437.440414] Call Trace:
Wed Jan 24 22:53:22 2018 kern.warn kernel: [ 7437.445287] [] show_stack+0x54/0x88
Wed Jan 24 22:53:22 2018 kern.warn kernel: [ 7437.453953] [] dump_stack+0x8c/0xd0
Wed Jan 24 22:53:22 2018 kern.warn kernel: [ 7437.462612] [] __warn+0xe4/0x118
Wed Jan 24 22:53:22 2018 kern.warn kernel: [ 7437.470750] [] warn_slowpath_fmt+0x30/0x3c
Wed Jan 24 22:53:22 2018 kern.warn kernel: [ 7437.480622] [] dev_watchdog+0x254/0x2f4
Wed Jan 24 22:53:22 2018 kern.warn kernel: [ 7437.489973] [] call_timer_fn.isra.3+0x24/0x84
Wed Jan 24 22:53:22 2018 kern.warn kernel: [ 7437.500358] [] run_timer_softirq+0x1e4/0x244
Wed Jan 24 22:53:22 2018 kern.warn kernel: [ 7437.510575] [] __do_softirq+0x294/0x2e0
Wed Jan 24 22:53:22 2018 kern.warn kernel: [ 7437.519922] [] irq_exit+0x7c/0x98
Wed Jan 24 22:53:22 2018 kern.warn kernel: [ 7437.528236] [] plat_irq_dispatch+0xb4/0xdc
Wed Jan 24 22:53:22 2018 kern.warn kernel: [ 7437.538103] [] except_vec_vi_end+0xb8/0xc4
Wed Jan 24 22:53:22 2018 kern.warn kernel: [ 7437.547989] [] cpu_startup_entry+0x104/0x170
Wed Jan 24 22:53:22 2018 kern.warn kernel: [ 7437.558222] [] start_kernel+0x47c/0x49c
Wed Jan 24 22:53:22 2018 kern.warn kernel: [ 7437.567725] ---[ end trace 37648a34027f878d ]---
Wed Jan 24 22:53:22 2018 kern.err kernel: [ 7437.576938] mtk_soc_eth 1e100000.ethernet eth0: transmit timed out
Wed Jan 24 22:53:22 2018 kern.info kernel: [ 7437.589281] mtk_soc_eth 1e100000.ethernet eth0: dma_cfg:80000065
Wed Jan 24 22:53:22 2018 kern.info kernel: [ 7437.601275] mtk_soc_eth 1e100000.ethernet eth0: tx_ring=0, base=06e0e000, max=512, ctx=428, dtx=428, fdx=427, next=428
Wed Jan 24 22:53:22 2018 kern.info kernel: [ 7437.622591] mtk_soc_eth 1e100000.ethernet eth0: rx_ring=0, base=06e14000, max=512, calc=60, drx=61

[ 7437.048845] ------------[ cut here ]------------
[ 7437.058089] WARNING: CPU: 0 PID: 0 at net/sched/sch_generic.c:316 dev_watchdog+0x254/0x2f4
[ 7437.074592] NETDEV WATCHDOG: eth0 (mtk_soc_eth): transmit queue 0 timed out
[ 7437.088469] Modules linked in: pppoe ppp_async uvcvideo pppox ppp_generic nf_conntrack_ipv6 mt76x2e 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_LOG xt_HL xt_DSCP xt_CLASSIFY videobuf2_v4l2 slhc nf_reject_ipv4 nf_nat_redirect nf_nat_masquerade_ipv4 nf_conntrack_ipv4 nf_nat_ipv4 nf_nat nf_log_ipv4 nf_defrag_ipv6 nf_defrag_ipv4 nf_conntrack_rtcache nf_conntrack_netlink iptable_mangle iptable_filter ipt_ECN ip_tables input_core crc_ccitt compat sch_cake nf_conntrack act_skbedit act_mirred em_u32 cls_u32 cls_tcindex cls_flow cls_route cls_fw sch_tbf sch_htb
[ 7437.229054]  sch_hfsc sch_ingress videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common videodev ledtrig_usbport 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_mangle ip6table_filter ip6_tables x_tables ifb dma_shared_buffer leds_gpio xhci_mtk xhci_plat_hcd xhci_pci xhci_hcd gpio_button_hotplug usbcore nls_base usb_common
[ 7437.340615] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.9.77 #0
[ 7437.352378] Stack : 00000000 00000000 80527b4a 00000033 803e79e4 00000000 00000000 80520000
[ 7437.369016]         804c81bc 804c7da7 80460564 00000000 00000000 80523824 ffffffff 00000200
[ 7437.385651]         00200000 8006a9e8 00000001 80520000 804cdec4 804cdec8 80465170 87c0ddcc
[ 7437.402289]         00000003 800a78a0 ffffffff 00000200 00200000 00000000 00000006 00c0ddcc
[ 7437.418924]         00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 7437.435558]         ...
[ 7437.440414] Call Trace:
[ 7437.445287] [] show_stack+0x54/0x88
[ 7437.453953] [] dump_stack+0x8c/0xd0
[ 7437.462612] [] __warn+0xe4/0x118
[ 7437.470750] [] warn_slowpath_fmt+0x30/0x3c
[ 7437.480622] [] dev_watchdog+0x254/0x2f4
[ 7437.489973] [] call_timer_fn.isra.3+0x24/0x84
[ 7437.500358] [] run_timer_softirq+0x1e4/0x244
[ 7437.510575] [] __do_softirq+0x294/0x2e0
[ 7437.519922] [] irq_exit+0x7c/0x98
[ 7437.528236] [] plat_irq_dispatch+0xb4/0xdc
[ 7437.538103] [] except_vec_vi_end+0xb8/0xc4
[ 7437.547989] [] cpu_startup_entry+0x104/0x170
[ 7437.558222] [] start_kernel+0x47c/0x49c
[ 7437.567725] ---[ end trace 37648a34027f878d ]---
[ 7437.576938] mtk_soc_eth 1e100000.ethernet eth0: transmit timed out
[ 7437.589281] mtk_soc_eth 1e100000.ethernet eth0: dma_cfg:80000065
[ 7437.601275] mtk_soc_eth 1e100000.ethernet eth0: tx_ring=0, base=06e0e000, max=512, ctx=428, dtx=428, fdx=427, next=428
[ 7437.622591] mtk_soc_eth 1e100000.ethernet eth0: rx_ring=0, base=06e14000, max=512, calc=60, drx=61
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More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=1170#comment4177