Messages in this thread | | | From | Ian Kumlien <> | Date | Sun, 15 Oct 2023 00:11:41 +0200 | Subject | [bug] 6.5.7 - ixbe freezes and causes RCU deadlock? |
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So, this keeps happening - it's happened for quite some time now... I can't really reproduce it but it starts with a network adapter freezing and ends with RCU errors and watchdog reboot... :/
cat bug.txt | ./scripts/decode_stacktrace.sh vmlinux [185433.169006] ------------[ cut here ]------------ [185433.169018] NETDEV WATCHDOG: eno3 (ixgbe): transmit queue 2 timed out 9736 ms [185433.169094] WARNING: CPU: 3 PID: 0 at net/sched/sch_generic.c:525 dev_watchdog (net/sched/sch_generic.c:525 (discriminator 3)) [185433.169113] Modules linked in: chaoskey [185433.169126] CPU: 3 PID: 0 Comm: swapper/3 Not tainted 6.5.7 #393 [185433.169136] Hardware name: Supermicro Super Server/A2SDi-12C-HLN4F, BIOS 1.7a 10/13/2022 [185433.169142] RIP: 0010:dev_watchdog (net/sched/sch_generic.c:525 (discriminator 3)) [185433.169152] Code: ff ff ff 48 89 df c6 05 e7 2a f8 00 01 e8 30 1f fa ff 45 89 f8 44 89 f1 48 89 de 48 89 c2 48 c7 c7 98 f9 cd 89 e8 48 65 28 ff <0f> 0b e9 2a ff ff ff 90 55 53 48 89 fb 48 8b 6f 18 0f 1f 44 00 00 All code ======== 0: ff (bad) 1: ff (bad) 2: ff 48 89 decl -0x77(%rax) 5: df c6 ffreep %st(6) 7: 05 e7 2a f8 00 add $0xf82ae7,%eax c: 01 e8 add %ebp,%eax e: 30 1f xor %bl,(%rdi) 10: fa cli 11: ff 45 89 incl -0x77(%rbp) 14: f8 clc 15: 44 89 f1 mov %r14d,%ecx 18: 48 89 de mov %rbx,%rsi 1b: 48 89 c2 mov %rax,%rdx 1e: 48 c7 c7 98 f9 cd 89 mov $0xffffffff89cdf998,%rdi 25: e8 48 65 28 ff call 0xffffffffff286572 2a:* 0f 0b ud2 <-- trapping instruction 2c: e9 2a ff ff ff jmp 0xffffffffffffff5b 31: 90 nop 32: 55 push %rbp 33: 53 push %rbx 34: 48 89 fb mov %rdi,%rbx 37: 48 8b 6f 18 mov 0x18(%rdi),%rbp 3b: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
Code starting with the faulting instruction =========================================== 0: 0f 0b ud2 2: e9 2a ff ff ff jmp 0xffffffffffffff31 7: 90 nop 8: 55 push %rbp 9: 53 push %rbx a: 48 89 fb mov %rdi,%rbx d: 48 8b 6f 18 mov 0x18(%rdi),%rbp 11: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) [185433.169161] RSP: 0018:ffffad6e4017cea8 EFLAGS: 00010282 [185433.169170] RAX: 0000000000000000 RBX: ffff9f2ac5a38000 RCX: 0000000000000027 [185433.169177] RDX: ffff9f2e2fadb408 RSI: 0000000000000001 RDI: ffff9f2e2fadb400 [185433.169183] RBP: ffff9f2ac5a38488 R08: 0000000000000000 R09: ffffad6e4017cd48 [185433.169189] R10: 0000000000000003 R11: ffffffff89f47928 R12: ffff9f2ac5c18280 [185433.169194] R13: ffff9f2ac5a383dc R14: 0000000000000002 R15: 0000000000002608 [185433.169200] FS: 0000000000000000(0000) GS:ffff9f2e2fac0000(0000) knlGS:0000000000000000 [185433.169208] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [185433.169214] CR2: 00007f16daf82638 CR3: 000000010273a000 CR4: 00000000003526e0 [185433.169221] Call Trace: [185433.169228] <IRQ> [185433.169233] ? dev_watchdog (net/sched/sch_generic.c:525 (discriminator 3)) [185433.169242] ? __warn (kernel/panic.c:673) [185433.169255] ? dev_watchdog (net/sched/sch_generic.c:525 (discriminator 3)) [185433.169264] ? report_bug (lib/bug.c:180 lib/bug.c:219) [185433.169273] ? handle_bug (arch/x86/kernel/traps.c:324) [185433.169282] ? exc_invalid_op (arch/x86/kernel/traps.c:345 (discriminator 1)) [185433.169291] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [185433.169305] ? dev_watchdog (net/sched/sch_generic.c:525 (discriminator 3)) [185433.169313] ? dev_watchdog (net/sched/sch_generic.c:525 (discriminator 3)) [185433.169320] ? pfifo_fast_reset (net/sched/sch_generic.c:496) [185433.169328] ? pfifo_fast_reset (net/sched/sch_generic.c:496) [185433.169336] call_timer_fn (./arch/x86/include/asm/jump_label.h:27 ./include/linux/jump_label.h:207 ./include/trace/events/timer.h:127 kernel/time/timer.c:1701) [185433.169345] __run_timers.part.0 (kernel/time/timer.c:1752 kernel/time/timer.c:2022) [185433.169354] ? __hrtimer_run_queues (./include/linux/seqlock.h:612 kernel/time/hrtimer.c:1714 kernel/time/hrtimer.c:1752) [185433.169362] ? recalibrate_cpu_khz (./arch/x86/include/asm/msr.h:215 arch/x86/kernel/tsc.c:1130) [185433.169375] ? ktime_get (kernel/time/timekeeping.c:292 (discriminator 3) kernel/time/timekeeping.c:388 (discriminator 3) kernel/time/timekeeping.c:848 (discriminator 3)) [185433.169384] run_timer_softirq (kernel/time/timer.c:2037) [185433.169392] __do_softirq (./arch/x86/include/asm/jump_label.h:27 ./include/linux/jump_label.h:207 ./include/trace/events/irq.h:142 kernel/softirq.c:554) [185433.169404] irq_exit_rcu (kernel/softirq.c:427 kernel/softirq.c:632 kernel/softirq.c:644) [185433.169413] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1109 (discriminator 14)) [185433.169425] </IRQ> [185433.169429] <TASK> [185433.169433] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:645) [185433.169445] RIP: 0010:cpuidle_enter_state (drivers/cpuidle/cpuidle.c:291) [185433.169456] Code: 00 e8 c2 8f fa fe e8 7d fa ff ff 8b 53 04 49 89 c5 0f 1f 44 00 00 31 ff e8 5b 02 fa fe 45 84 ff 0f 85 60 02 00 00 fb 45 85 f6 <0f> 88 8e 01 00 00 49 63 ce 4c 8b 14 24 48 8d 04 49 48 8d 14 81 48 All code ======== 0: 00 e8 add %ch,%al 2: c2 8f fa ret $0xfa8f 5: fe (bad) 6: e8 7d fa ff ff call 0xfffffffffffffa88 b: 8b 53 04 mov 0x4(%rbx),%edx e: 49 89 c5 mov %rax,%r13 11: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 16: 31 ff xor %edi,%edi 18: e8 5b 02 fa fe call 0xfffffffffefa0278 1d: 45 84 ff test %r15b,%r15b 20: 0f 85 60 02 00 00 jne 0x286 26: fb sti 27: 45 85 f6 test %r14d,%r14d 2a:* 0f 88 8e 01 00 00 js 0x1be <-- trapping instruction 30: 49 63 ce movslq %r14d,%rcx 33: 4c 8b 14 24 mov (%rsp),%r10 37: 48 8d 04 49 lea (%rcx,%rcx,2),%rax 3b: 48 8d 14 81 lea (%rcx,%rax,4),%rdx 3f: 48 rex.W
Code starting with the faulting instruction =========================================== 0: 0f 88 8e 01 00 00 js 0x194 6: 49 63 ce movslq %r14d,%rcx 9: 4c 8b 14 24 mov (%rsp),%r10 d: 48 8d 04 49 lea (%rcx,%rcx,2),%rax 11: 48 8d 14 81 lea (%rcx,%rax,4),%rdx 15: 48 rex.W [185433.169463] RSP: 0018:ffffad6e400afe98 EFLAGS: 00000202 [185433.169472] RAX: ffff9f2e2faebb80 RBX: ffff9f2e2faf6500 RCX: 000000000000001f [185433.169478] RDX: 0000000000000003 RSI: 0000000040000000 RDI: 0000000000000000 [185433.169483] RBP: 0000000000000002 R08: 0000000000000000 R09: ffff9f2e2faea6c4 [185433.169489] R10: 0000000000000008 R11: 00000000000003d9 R12: ffffffff8a017140 [185433.169494] R13: 0000a8a6862ac667 R14: 0000000000000002 R15: 0000000000000000 [185433.169505] ? cpuidle_enter_state (drivers/cpuidle/cpuidle.c:285) [185433.169516] cpuidle_enter (drivers/cpuidle/cpuidle.c:390) [185433.169530] do_idle (kernel/sched/idle.c:219 kernel/sched/idle.c:282) [185433.169540] cpu_startup_entry (kernel/sched/idle.c:379 (discriminator 1)) [185433.169550] start_secondary (arch/x86/kernel/smpboot.c:326) [185433.169562] secondary_startup_64_no_verify (arch/x86/kernel/head_64.S:441) [185433.169575] </TASK> [185433.169579] ---[ end trace 0000000000000000 ]--- [185433.169594] ixgbe 0000:07:00.0 eno3: initiating reset due to tx timeout [185433.169621] ixgbe 0000:07:00.0 eno3: Reset adapter
And in the IPMI console: [185433.169621] ixgbe 0000:07:00.0 eno3: Reset adapter [185444.166717] rcu: INFO: rcu_preempt self-detected stall on CPU [185444.172665] rcu: 0-...!: (20999 ticks this GP) idle=8d84/1/0x4000000000000000 softirq=1976223/1976223 fqs=2 [185444.182681] rcu: (t=21015 jiffies g=6787421 q=738 ncpus=12) [185444.188523] rcu: rcu_preempt kthread timer wakeup didn't happen for 21009 jiffies! g6787421 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 [185444.200361] rcu: Possible timer handling issue on cpu=8 timer-softirq=1196063 [185444.207761] rcu: rcu_preempt kthread starved for 21032 jiffies! g6787421 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=8 [185444.218639] rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior. [185444.227946] rcu: RCU grace-period kthread stack dump: [185444.233347] rcu: Stack dump where RCU GP kthread last ran: [185507.243156] rcu: INFO: rcu_preempt self-detected stall on CPU [185507.249098] rcu: 0-....: (84002 ticks this GP) idle=8d84/1/0x4000000000000000 softirq=1976223/1976223 fqs=1559 [185507.259375] rcu: (t=84094 jiffies g=6787421 q=1213 ncpus=12) [185570.265595] rcu: INFO: rcu_preempt self-detected stall on CPU [185570.271532] rcu: 0-....: (147002 ticks this GP) idle=8d84/1/0x4000000000000000 softirq=1976223/1976223 fqs=13844 [185570.282016] rcu: (t=147117 jiffies g=6787421 q=1273 ncpus=12) [185570.288049] rcu: rcu_preempt kthread timer wakeup didn't happen for 13787 jiffies! g6787421 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 [185570.299914] rcu: Possible timer handling issue on cpu=9 timer-softirq=1211534 [185570.307347] rcu: rcu_preempt kthread starved for 13810 jiffies! g6787421 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=9 [185570.318258] rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior. [185570.327601] rcu: RCU grace-period kthread stack dump: [185570.333005] rcu: Stack dump where RCU GP kthread last ran:
And thats everything i have...
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