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pkg/report: update parsing of rcu stalls in ioctls

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vfs_ioctl is now inlined somethimes...
This commit is contained in:
Dmitry Vyukov 2020-02-02 12:56:15 +01:00
parent 2274ad39c8
commit 93e5e33559
2 changed files with 53 additions and 0 deletions
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1
pkg/report/linux.go
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@ -635,6 +635,7 @@ var linuxStallAnchorFrames = []*regexp.Regexp{
compile("do_iter_read"),
compile("do_iter_write"),
compile("vfs_ioctl"),
compile("ksys_ioctl"), // vfs_ioctl may be inlined
compile("blkdev_driver_ioctl"),
compile("blkdev_ioctl"),
compile("^call_read_iter"),

52
pkg/report/testdata/linux/report/468 vendored Normal file
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@ -0,0 +1,52 @@
TITLE: INFO: rcu detected stall in kvm_vcpu_ioctl
TYPE: HANG
[ 839.223284][ C1] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
[ 839.230397][ C1] (detected by 1, t=10502 jiffies, g=10641, q=2)
[ 839.236842][ C1] rcu: All QSes seen, last rcu_preempt kthread activity 10503 (4295021069-4295010566), jiffies_till_next_fqs=1, root ->qsmask 0x0
[ 839.250308][ C1] syz-executor543 R running task 27000 10496 10495 0x00000000
[ 839.258215][ C1] Call Trace:
[ 839.261494][ C1] <IRQ>
[ 839.264483][ C1] sched_show_task.cold+0x2ee/0x35d
[ 839.274562][ C1] rcu_sched_clock_irq.cold+0xb23/0xc37
[ 839.280179][ C1] update_process_times+0x2d/0x70
[ 839.285257][ C1] tick_sched_handle+0xa2/0x190
[ 839.290123][ C1] tick_sched_timer+0x53/0x140
[ 839.294896][ C1] __hrtimer_run_queues+0x364/0xe40
[ 839.321988][ C1] hrtimer_interrupt+0x314/0x770
[ 839.327058][ C1] smp_apic_timer_interrupt+0x160/0x610
[ 839.332644][ C1] apic_timer_interrupt+0xf/0x20
[ 839.337576][ C1] </IRQ>
[ 839.340603][ C1] RIP: 0010:lock_acquire+0x20b/0x410
[ 839.345915][ C1] Code: 94 08 00 00 00 00 00 00 48 c1 e8 03 80 3c 10 00 0f 85 d3 01 00 00 48 83 3d 19 cf 58 08 00 0f 84 53 01 00 00 48 8b 7d c8 57 9d <0f> 1f 44 00 00 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 65 8b
[ 839.365614][ C1] RSP: 0018:ffffc90001f57ad0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
[ 839.374038][ C1] RAX: 1ffffffff136753f RBX: ffff888089b4a140 RCX: ffffffff815a7ff0
[ 839.382029][ C1] RDX: dffffc0000000000 RSI: 0000000000000008 RDI: 0000000000000286
[ 839.390008][ C1] RBP: ffffc90001f57b18 R08: 1ffffffff16a137b R09: fffffbfff16a137c
[ 839.397984][ C1] R10: ffff888089b4aa00 R11: ffff888089b4a140 R12: ffffc90001fcae18
[ 839.405963][ C1] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000002
[ 839.419020][ C1] vcpu_enter_guest+0x323d/0x6100
[ 839.478770][ C1] kvm_arch_vcpu_ioctl_run+0x430/0x17b0
[ 839.490122][ C1] kvm_vcpu_ioctl+0x4dc/0xfc0
[ 839.531883][ C1] ksys_ioctl+0x123/0x180
[ 839.536230][ C1] __x64_sys_ioctl+0x73/0xb0
[ 839.545542][ C1] do_syscall_64+0xfa/0x790
[ 839.550066][ C1] entry_SYSCALL_64_after_hwframe+0x49/0xbe
[ 839.555962][ C1] RIP: 0033:0x4478a9
[ 839.559874][ C1] Code: e8 8c e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb c4 fb ff c3 66 2e 0f 1f 84 00 00 00 00
[ 839.579480][ C1] RSP: 002b:00007ffdda97c7c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[ 839.587891][ C1] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004478a9
[ 839.595860][ C1] RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000009
[ 839.603843][ C1] RBP: 00000000006d2018 R08: 00000000004002e0 R09: 00000000004002e0
[ 839.611829][ C1] R10: 00000000004002e0 R11: 0000000000000246 R12: 0000000000404200
[ 839.619804][ C1] R13: 0000000000404290 R14: 0000000000000000 R15: 0000000000000000
[ 839.627819][ C1] rcu: rcu_preempt kthread starved for 10542 jiffies! g10641 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
[ 839.638999][ C1] rcu: RCU grace-period kthread stack dump:
[ 839.644922][ C1] rcu_preempt R running task 29224 10 2 0x80004000
[ 839.652821][ C1] Call Trace:
[ 839.656122][ C1] __schedule+0x934/0x1f90
[ 839.681553][ C1] schedule+0xdc/0x2b0
[ 839.685643][ C1] schedule_timeout+0x486/0xc50
[ 839.716370][ C1] rcu_gp_kthread+0xa10/0x1940
[ 839.748441][ C1] kthread+0x361/0x430
[ 839.764055][ C1] ret_from_fork+0x24/0x30