Clock issues and crash on resume on 10-Stable r263062M

[Aleksandr Rybalko]

On Tue, 18 Mar 2014 21:07:57 -0700
Adrian Chadd <adrian at freebsd.org> wrote:

> Well, changing the default is cool, but there's still some odd bug
> there that could do with chasing down. :)

Sorry, I currently can't work on investigation why GIANT lock is NULL
sometime on resume. (IIRC it happen because I use callout_init w/o
mtx, so callout try to lock using GIANT)

But I will glad to get any help on that :)

> 
> 
> -a
> 
> On 18 March 2014 14:46, Aleksandr Rybalko <ray at ddteam.net> wrote:
> > On Tue, 18 Mar 2014 14:38:31 -0700
> > Kevin Oberman <rkoberman at gmail.com> wrote:
> >
> >> On Tue, Mar 18, 2014 at 12:27 PM, John Baldwin <jhb at freebsd.org>
> >> wrote:
> >>
> >> > On Saturday, March 15, 2014 3:44:46 pm Kevin Oberman wrote:
> >> > > 2. The time does not update after resume. After about 2 seconds,
> >> > > ehe
> >> > system
> >> > > crashes.
> >> > > Fatal trap 12: page fault while in kernel mode
> >> > > cpuid = 0; apic id = 00
> >> > > fault virtual address   = 0x30
> >> > > fault code              = supervisor read data, page not present
> >> > > instruction pointer     = 0x20:0xffffffff808c9ef3
> >> > > stack pointer           = 0x28:0xfffffe00f13548e0
> >> > > frame pointer           = 0x28:0xfffffe00f13549b0
> >> > > code segment            = base 0x0, limit 0xfffff, type 0x1b
> >> > >                         = DPL 0, pres 1, long 1, def32 0, gran 1
> >> > > processor eflags        = interrupt enabled, resume, IOPL = 0
> >> > > current process         = 12 (swi4: clock)
> >> > > trap number             = 12
> >> > > panic: page fault
> >> > > cpuid = 0
> >> > > KDB: stack backtrace:
> >> > > #0 0xffffffff808ed460 at kdb_backtrace+0x60
> >> > > #1 0xffffffff808b4e35 at panic+0x155
> >> > > #2 0xffffffff80c97022 at trap_fatal+0x3a2
> >> > > #3 0xffffffff80c972f9 at trap_pfault+0x2c9
> >> > > #4 0xffffffff80c96a8b at trap+0x5bb
> >> > > #5 0xffffffff80c7dd42 at calltrap+0x8
> >> > > #6 0xffffffff808ca304 at softclock+0x94
> >> > > #7 0xffffffff8088929b at intr_event_execute_handlers+0xab
> >> > > #8 0xffffffff808896e6 at ithread_loop+0x96
> >> > > #9 0xffffffff80886f4a at fork_exit+0x9a
> >> > > #10 0xffffffff80c7e27e at fork_trampoline+0xe
> >> > > [...]
> >> > > #0  doadump (textdump=<value optimized out>) at pcpu.h:219
> >> > > 219     pcpu.h: No such file or directory.
> >> > >         in pcpu.h
> >> > > (kgdb) #0  doadump (textdump=<value optimized out>) at pcpu.h:219
> >> > > #1  0xffffffff808b4ab0 in kern_reboot (howto=260)
> >> > >     at /usr/src/sys/kern/kern_shutdown.c:452
> >> > > #2  0xffffffff808b4e74 in panic (fmt=<value optimized out>)
> >> > >     at /usr/src/sys/kern/kern_shutdown.c:759
> >> > > #3  0xffffffff80c97022 in trap_fatal (frame=<value optimized out>,
> >> > >     eva=<value optimized out>)
> >> > > at /usr/src/sys/amd64/amd64/trap.c:875
> >> > > #4  0xffffffff80c972f9 in trap_pfault (frame=0xfffffe00f1354830,
> >> > usermode=0)
> >> > >     at /usr/src/sys/amd64/amd64/trap.c:692
> >> > > #5  0xffffffff80c96a8b in trap (frame=0xfffffe00f1354830)
> >> > >     at /usr/src/sys/amd64/amd64/trap.c:456
> >> > > #6  0xffffffff80c7dd42 in calltrap ()
> >> > >     at /usr/src/sys/amd64/amd64/exception.S:232
> >> > > #7  0xffffffff808c9ef3 in softclock_call_cc (c=0xffffffff813834b8,
> >> > >     cc=0xffffffff81527680, direct=0) at
> >> > /usr/src/sys/kern/kern_timeout.c:701
> >> > > #8  0xffffffff808ca304 in softclock (arg=0xffffffff81527680)
> >> > >     at /usr/src/sys/kern/kern_timeout.c:810
> >> >
> >> > This is actually a crash in newcons.  Try setting
> >> > kern.vt.suspendswitch to 0
> >> > as a workaround.
> >> >
> >> > --
> >> > John Baldwin
> >> >
> >>
> >> Ack! I had forgotten seeing the thread on this just a while back,
> >> before vt was committed to 10.
> >>
> >> Thanks so much!
> >> --
> >> R. Kevin Oberman, Network Engineer, Retired
> >> E-mail: rkoberman at gmail.com
> >
> > Looks like I have to invert default for it :)
> >
> > Sorry for making such problems.
> >
> > WBW
> > --
> > Aleksandr Rybalko <ray at ddteam.net>
> > _______________________________________________
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-- 
Aleksandr Rybalko <ray at ddteam.net>