On Sun, Oct 25, 2015 at 10:44:06PM +0300, Lev Serebryakov wrote:
> Hello freebsd-current,
>
>I've tracked down my reboot on r289874 to r286256. My system crashes
> after several seconds of running with several post-286256 revisions
> (r289874 is tested most by me). But if I revert r286256 (and only this
> one), r289874 works solid-stable with both ULE and 4BSD. It is amd64
> system.
td_oncpu and td_lastcpu are not used for anything in scheduler,
td_lastcpu usage is only advisory.
At least, show the source line for the sched_add+0x116.
But you probably already know that a full backtrace from kgdb,
with locals, and print-out of the current thread structure would
be useful to see what is going on.
>
> Typical panic logs look like this:
>
> ==
> gif0: link state changed to UP
> kernel trap 9 with interrupts disabled
>
>
> Fatal trap 9: general protection fault while in kernel mode
> cpuid = 0; apic id = 00
> instruction pointer = 0x20:0x8046e3c6
> stack pointer = 0x28:0xfe011bd59890
> frame pointer = 0x28:0xfe011bd59980
> code segment= base 0x0, limit 0xf, type 0x1b
> = DPL 0, pres 1, long 1, def32 0, gran 1
> processor eflags= resume, IOPL = 0
> current process = 11 (swi4: clock (0))
> trap number = 9
> panic: general protection fault
> cpuid = 0
> KDB: stack backtrace:
> db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfe011bd59530
> vpanic() at vpanic+0x182/frame 0xfe011bd595b0
> panic() at panic+0x43/frame 0xfe011bd59610
> trap_fatal() at trap_fatal+0x351/frame 0xfe011bd59670
> trap() at trap+0x6d8/frame 0xfe011bd597d0
> calltrap() at calltrap+0x8/frame 0xfe011bd597d0
> --- trap 0x9, rip = 0x8046e3c6, rsp = 0xfe011bd598a0, rbp =
> 0xfe011bd59980 ---
> sched_add() at sched_add+0x116/frame 0xfe011bd59980
> intr_event_schedule_thread() at intr_event_schedule_thread+0xae/frame
> 0xfe011bd599b0
> intr_event_handle() at intr_event_handle+0xe2/frame 0xfe011bd59a00
> intr_execute_handlers() at intr_execute_handlers+0x48/frame 0xfe011bd59a30
> lapic_handle_intr() at lapic_handle_intr+0x3f/frame 0xfe011bd59a50
> Xapic_isr1() at Xapic_isr1+0xb7/frame 0xfe011bd59a50
> --- interrupt, rip = 0x8063e1f2, rsp = 0xfe011bd59b20, rbp =
> 0xfe011bd59b20 ---
> spinlock_exit() at spinlock_exit+0x32/frame 0xfe011bd59b20
> intr_event_execute_handlers() at intr_event_execute_handlers+0xae/frame
> 0xfe011bd59b60
> ithread_loop() at ithread_loop+0xa6/frame 0xfe011bd59bb0
> fork_exit() at fork_exit+0x75/frame 0xfe011bd59bf0
> fork_trampoline() at fork_trampoline+0xe/frame 0xfe011bd59bf0
> --- trap 0, rip = 0, rsp = 0, rbp = 0 ---
> Uptime: 16s
> ==
> wlan0: AP-ENABLED
> kernel trap 9 with interrupts disabled
>
>
> Fatal trap 9: general protection fault while in kernel mode
> cpuid = 0; apic id = 00
> instruction pointer = 0x20:0x805190b6
> stack pointer = 0x28:0xfe012260e7d0
> frame pointer = 0x28:0xfe012260e8c0
> code segment= base 0x0, limit 0xf, type 0x1b
> = DPL 0, pres 1, long 1, def32 0, gran 1
> processor eflags= resume, IOPL = 0
> current process = 16 (syncer)
> trap number = 9
> panic: general protection fault
> cpuid = 0
> KDB: stack backtrace:
> db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfe012260e470
> vpanic() at vpanic+0x182/frame 0xfe012260e4f0
> panic() at panic+0x43/frame 0xfe012260e550
> trap_fatal() at trap_fatal+0x351/frame 0xfe012260e5b0
> trap() at trap+0x6d8/frame 0xfe012260e710
> calltrap() at calltrap+0x8/frame 0xfe012260e710
> --- trap 0x9, rip = 0x805190b6, rsp = 0xfe012260e7e0, rbp =
> 0xfe012260e8c0 ---
> sched_add() at sched_add+0x116/frame 0xfe012260e8c0
> intr_event_schedule_thread() at intr_event_schedule_thread+0xae/frame
> 0xfe012260e8f0
> intr_event_handle() at intr_event_handle+0xe2/frame 0xfe012260e940
> intr_execute_handlers() at intr_execute_handlers+0x48/frame 0xfe012260e970
> lapic_handle_intr() at lapic_handle_intr+0x3f/frame 0xfe012260e990
> Xapic_isr1() at Xapic_isr1+0xb7/frame 0xfe012260e990
> --- interrupt, rip = 0x8071eaad, rsp = 0xfe012260ea60, rbp =
> 0xfe012260ea70 ---
> spinlock_exit() at spinlock_exit+0x2d/frame 0xfe012260ea70
> sleepq_timedwait() at sleepq_timedwait+0xd3/frame 0xfe012260eaa0
> _cv_timedwait_sbt() at _cv_timedwait_sbt+0x1a0/frame 0xfe012260eb10
> sched_sync() at sched_sync+0x6b6/frame 0xfe012260ebb0
> fork_exit() at fork_exit+0x75/frame 0xfe012260ebf0
> fork_trampoline() at fork_trampoline+0xe/frame 0xfe012260ebf0
> --- trap 0, rip = 0, rsp = 0, rbp = 0 ---
>
