Bug#824790: linux-image-4.5.0-1-amd64: lots of WARNINGs in hfsc_dequeue+0x300/0x320 when using sch_hfsc+sch_codel
Source: linux Source-Version: 4.18~rc3-1~exp1 On Thu, May 19, 2016 at 09:12:46PM +0200, Mirek Kratochvil wrote: > Package: src:linux > Version: 4.5.1-1 > Severity: normal > Tags: upstream > > Dear Maintainer, > > When attaching a codel or fq_codel qdisc to a leaf hfsc class, sometimes a > bunch of warnings (dmesg attached) show up. That would not be a problem, but > the warnings seem to be triggered for each packet for some time, and as a side > situation the processing renders the system more or less unresponsive for > several seconds (which may be a problem for QoS machine). > > A bug that is probably related (but concerning hfsc+sfq) is #631945 , my > configuration is mostly the same, except with codel instead of SFQ. No similar > fix exists for codel. > > When trying to rule out the causes, I found that the amount of traffic doesn't > matter (the machine is currently processing around 1Gbit/s). fq_codel shows > the > same behavior, no other qdisc I tested causes the warnings. > > I hope someone could point out what's wrong with codel, if I see the cause I > can write/send a patch to upstream. This issue appears to have been fixed in 4.18-rc3 upstream. Closing accordingly. Regards, Salvatore
Bug#824790: linux-image-4.5.0-1-amd64: lots of WARNINGs in hfsc_dequeue+0x300/0x320 when using sch_hfsc+sch_codel
Package: src:linux Version: 4.9.65-3+deb9u2 Followup-For: Bug #824790 Dear Maintainer, This might be related to: https://bugzilla.kernel.org/show_bug.cgi?id=109581 *** Reporter, please consider answering these questions, where appropriate *** * What led up to the situation? Upgrade from debian jessie to debian stretch * What exactly did you do (or not do) that was effective (or ineffective)? * What was the outcome of this action? The kernel is spamming the syslog, but the system works as far as I can see * What outcome did you expect instead? The kernel to be quiet. :-) *** End of the template - remove these template lines *** -- Package-specific info: ** Version: Linux version 4.9.0-5-amd64 (debian-ker...@lists.debian.org) (gcc version 6.3.0 20170516 (Debian 6.3.0-18) ) #1 SMP Debian 4.9.65-3+deb9u2 (2018-01-04) ** Command line: BOOT_IMAGE=/boot/vmlinuz-4.9.0-5-amd64 root=UUID=3577dfcf-b9db-4cfe-8654-c7f42bc39bba ro console=tty1 console=ttyS0,115200n81 elevator=deadline quiet ** Tainted: W (512) * Taint on warning. ** Kernel log: [78683.768826] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [78683.768827] 83b29964 [78683.768830] 8387662e 8aba7dbfd148 011e3817c199 8aba7dbfd000 [78683.768833] 8aba7dbfd448 0002 8aba7dbfd000 c05f42f4 [78683.768836] Call Trace: [78683.768840] [] ? dump_stack+0x5c/0x78 [78683.768843] [] ? __warn+0xbe/0xe0 [78683.768846] [] ? hfsc_dequeue+0x314/0x330 [sch_hfsc] [78683.768849] [] ? __qdisc_run+0x88/0x260 [78683.768851] [] ? net_tx_action+0xf2/0x1d0 [78683.768854] [] ? __do_softirq+0x105/0x290 [78683.768857] [] ? sort_range+0x20/0x20 [78683.768859] [] ? run_ksoftirqd+0x25/0x40 [78683.768861] [] ? smpboot_thread_fn+0xfe/0x150 [78683.768865] [] ? kthread+0xd7/0xf0 [78683.768868] [] ? kthread_park+0x60/0x60 [78683.768871] [] ? ret_from_fork+0x41/0x50 [78683.768873] ---[ end trace 7bfba4e259714dd5 ]--- [78683.769530] [ cut here ] [78683.769536] WARNING: CPU: 1 PID: 0 at /build/linux-4.9.65/net/sched/sch_hfsc.c:1400 hfsc_dequeue+0x314/0x330 [sch_hfsc] [78683.769537] Modules linked in: tun ipt_MASQUERADE nf_nat_masquerade_ipv4 xt_conntrack xt_nat iptable_nat nf_nat_ipv4 nf_nat iptable_filter cls_flow sch_fq_codel cls_fw sch_hfsc xt_connlimit nf_conntrack_ipv4 nf_defrag_ipv4 xt_TCPMSS xt_tcpudp iptable_mangle ip_tables xt_mark xt_connmark ip6table_mangle ip6_tables x_tables veth nf_conntrack_ipv6 nf_defrag_ipv6 nf_conntrack 8021q garp mrp stp llc loop crct10dif_pclmul crc32_pclmul ghash_clmulni_intel ppdev joydev evdev parport_pc pcspkr serio_raw virtio_balloon parport pvpanic button ext4 crc16 jbd2 crc32c_generic fscrypto ecb mbcache ata_generic virtio_blk virtio_net crc32c_intel aesni_intel aes_x86_64 glue_helper lrw gf128mul ablk_helper cryptd uhci_hcd psmouse ehci_hcd usbcore ata_piix usb_common floppy libata scsi_mod virtio_pci virtio_ring virtio [78683.769577] i2c_piix4 [78683.769580] CPU: 1 PID: 0 Comm: swapper/1 Tainted: GW 4.9.0-5-amd64 #1 Debian 4.9.65-3+deb9u2 [78683.769581] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [78683.769583] 83b29964 [78683.769586] 8387662e 8aba7dbfd148 011e3817efb5 8aba7dbfd000 [78683.769589] 8aba7dbfd448 ffca 8aba7dbfd000 c05f42f4 [78683.769592] Call Trace: [78683.769593] [78683.769596] [] ? dump_stack+0x5c/0x78 [78683.769600] [] ? __warn+0xbe/0xe0 [78683.769602] [] ? hfsc_dequeue+0x314/0x330 [sch_hfsc] [78683.769605] [] ? __qdisc_run+0x88/0x260 [78683.769608] [] ? __dev_queue_xmit+0x231/0x680 [78683.769612] [] ? ip_finish_output2+0x27a/0x370 [78683.769615] [] ? nf_hook_slow+0x6d/0xc0 [78683.769617] [] ? ip_output+0x6a/0xf0 [78683.769620] [] ? __ip_flush_pending_frames.isra.42+0x80/0x80 [78683.769624] [] ? ip_forward+0x37a/0x470 [78683.769628] [] ? ip_frag_mem+0x10/0x10 [78683.769632] [] ? ip_rcv+0x27d/0x3a0 [78683.769635] [] ? inet_del_offload+0x40/0x40 [78683.769638] [] ? __netif_receive_skb_core+0x4f9/0xa00 [78683.769642] [] ? kvm_clock_get_cycles+0x1a/0x20 [78683.769645] [] ? netif_receive_skb_internal+0x2f/0xa0 [78683.769648] [] ? napi_gro_receive+0xb5/0xd0 [78683.769653] [] ? virtnet_receive+0x24b/0x930 [virtio_net] [78683.769657] [] ? virtnet_poll+0x18/0x70 [virtio_net] [78683.769660] [] ? net_rx_action+0x240/0x370 [78683.769663] [] ? __do_softirq+0x105/0x290 [78683.769665] [] ? irq_exit+0xae/0xb0 [78683.769667] [] ? do_IRQ+0x4f/0xd0 [78683.769671] [] ? common_interrupt+0x96/0x96 [78683.769671] [78683.769675] [] ? native_safe_halt+0x2/0x10 [78683.769678] [] ? default_idle+0x1a/0xd0 [78683.769680] [] ? cpu_startup_entry+0x1ca/0x240 [78683.769683] [] ? start_secondary+0x14d/0x190 [78683.769685] ---[ end trace 7bfba4e259714dd6 ]--- [78683.773579]
Bug#824790: linux-image-4.5.0-1-amd64: lots of WARNINGs in hfsc_dequeue+0x300/0x320 when using sch_hfsc+sch_codel
Package: src:linux Version: 4.5.1-1 Severity: normal Tags: upstream Dear Maintainer, When attaching a codel or fq_codel qdisc to a leaf hfsc class, sometimes a bunch of warnings (dmesg attached) show up. That would not be a problem, but the warnings seem to be triggered for each packet for some time, and as a side situation the processing renders the system more or less unresponsive for several seconds (which may be a problem for QoS machine). A bug that is probably related (but concerning hfsc+sfq) is #631945 , my configuration is mostly the same, except with codel instead of SFQ. No similar fix exists for codel. When trying to rule out the causes, I found that the amount of traffic doesn't matter (the machine is currently processing around 1Gbit/s). fq_codel shows the same behavior, no other qdisc I tested causes the warnings. I hope someone could point out what's wrong with codel, if I see the cause I can write/send a patch to upstream. -mk -- Package-specific info: ** Version: Linux version 4.5.0-1-amd64 (debian-ker...@lists.debian.org) (gcc version 5.3.1 20160409 (Debian 5.3.1-14) ) #1 SMP Debian 4.5.1-1 (2016-04-14) ** Command line: BOOT_IMAGE=/vmlinuz-4.5.0-1-amd64 root=UUID=76eda643-1cd8-4a76-92f5-a79ac4bd7bd0 ro panic=60 quiet ** Tainted: WE (8704) * Taint on warning. * Unsigned module has been loaded (currently expected). ** Kernel log: [1311017.332962] WARNING: CPU: 4 PID: 0 at /build/linux-HoPide/linux-4.5.1/net/sched/sch_hfsc.c:1429 hfsc_dequeue+0x300/0x320 [sch_hfsc]() [1311017.332966] Modules linked in: sch_codel(E) sch_fq_codel(E) act_mirred(E) act_gact(E) sch_ingress(E) sch_sfq(E) cls_u32(E) sch_hfsc(E) ext4(E) crc16(E) mbcache(E) jbd2(E) crc32c_generic(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) sg(E) coretemp(E) kvm_intel(E) kvm(E) mgag200(E) ttm(E) drm_kms_helper(E) joydev(E) drm(E) iTCO_wdt(E) iTCO_vendor_support(E) i2c_algo_bit(E) acpi_power_meter(E) irqbypass(E) crct10dif_pclmul(E) crc32_pclmul(E) ghash_clmulni_intel(E) hmac(E) drbg(E) ansi_cprng(E) evdev(E) pcspkr(E) aesni_intel(E) aes_x86_64(E) lrw(E) gf128mul(E) glue_helper(E) ablk_helper(E) cryptd(E) ipmi_devintf(E) 8250_fintek(E) button(E) wmi(E) acpi_pad(E) ipmi_si(E) ipmi_msghandler(E) shpchp(E) sb_edac(E) edac_core(E) mei_me(E) mei(E) tpm_tis(E) lpc_ich(E) tpm(E) mfd_core(E) processor(E) ifb(E) autofs4(E) [1311017.332997] xfs(E) libcrc32c(E) hid_generic(E) usbhid(E) hid(E) sr_mod(E) cdrom(E) sd_mod(E) crc32c_intel(E) ixgbe(E) dca(E) vxlan(E) ip6_udp_tunnel(E) udp_tunnel(E) mdio(E) ahci(E) libahci(E) ehci_pci(E) ehci_hcd(E) libata(E) tg3(E) ptp(E) pps_core(E) usbcore(E) libphy(E) usb_common(E) megaraid_sas(E) scsi_mod(E) fjes(E) [1311017.333010] CPU: 4 PID: 0 Comm: swapper/4 Tainted: GW E 4.5.0-1-amd64 #1 Debian 4.5.1-1 [1311017.333011] Hardware name:/08DM12, BIOS 2.1.2 01/20/2014 [1311017.333011] 0286 c030b3f15909e533 81307b65 [1311017.333013] c0473060 8107905d 880c1076c148 12a1f2eb6d9f [1311017.333016] 880c1076c000 880c1076c490 8800c8da3000 c0471540 [1311017.333018] Call Trace: [1311017.333018][] ? dump_stack+0x5c/0x77 [1311017.333024] [] ? warn_slowpath_common+0x7d/0xb0 [1311017.333027] [] ? hfsc_dequeue+0x300/0x320 [sch_hfsc] [1311017.333031] [] ? __qdisc_run+0x65/0x190 [1311017.333032] [] ? net_tx_action+0xd6/0x230 [1311017.333034] [] ? __do_softirq+0xf8/0x290 [1311017.333037] [] ? irq_exit+0x9b/0xa0 [1311017.333040] [] ? smp_apic_timer_interrupt+0x3e/0x50 [1311017.333043] [] ? apic_timer_interrupt+0x82/0x90 [1311017.333044][] ? cpuidle_enter_state+0x118/0x2c0 [1311017.333047] [] ? cpuidle_enter_state+0x105/0x2c0 [1311017.333049] [] ? cpu_startup_entry+0x287/0x340 [1311017.333053] [] ? start_secondary+0x15a/0x190 [1311017.333058] ---[ end trace f0baeef58cceeec5 ]--- [1311017.333066] [ cut here ] [1311017.333072] WARNING: CPU: 6 PID: 0 at /build/linux-HoPide/linux-4.5.1/net/sched/sch_hfsc.c:1429 hfsc_dequeue+0x300/0x320 [sch_hfsc]() [1311017.333077] Modules linked in: sch_codel(E) sch_fq_codel(E) act_mirred(E) act_gact(E) sch_ingress(E) sch_sfq(E) cls_u32(E) sch_hfsc(E) ext4(E) crc16(E) mbcache(E) jbd2(E) crc32c_generic(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) sg(E) coretemp(E) kvm_intel(E) kvm(E) mgag200(E) ttm(E) drm_kms_helper(E) joydev(E) drm(E) iTCO_wdt(E) iTCO_vendor_support(E) i2c_algo_bit(E) acpi_power_meter(E) irqbypass(E) crct10dif_pclmul(E) crc32_pclmul(E) ghash_clmulni_intel(E) hmac(E) drbg(E) ansi_cprng(E) evdev(E) pcspkr(E) aesni_intel(E) aes_x86_64(E) lrw(E) gf128mul(E) glue_helper(E) ablk_helper(E) cryptd(E) ipmi_devintf(E) 8250_fintek(E) button(E) wmi(E) acpi_pad(E) ipmi_si(E) ipmi_msghandler(E) shpchp(E) sb_edac(E) edac_core(E) mei_me(E) mei(E) tpm_tis(E) lpc_ich(E) tpm(E) mfd_core(E) processor(E) ifb(E) autofs4(E) [1311017.333138] xfs(E) libcrc32c(E) hid_generic(E) usbhid(E) hid(E) sr_mod(E) cdrom(E)
