Re: NetBSD on Dedibox SC Gen2

[Swift Griggs <swiftgriggs%gmail.com@localhost>]

On Sun, 1 Nov 2015, Nils Ratusznik wrote:
> I can clearly live with it, since the KVM is only used for installations 
> and for first tasks. However, I experienced freezes on these two 
> machines : there is no answer to a ping or ssh, and I get no display 
> from the console (but I suppose this is related to the KVM problem).

I have a very similar problem with NetBSD 7.0 i386 and amd64. I started 
experiencing it with the 7.0_RC releases. I filed a PR (50182) for it. I 
just uploaded some more information for it today. I can reproduce it by 
just hitting my KVM switch until my machine crashes.

This is what I added to the PR today:

I get two different backtraces and a pretty consistent dmesg:

Backtrace #1 (this is what mostly happens):
(gdb) bt
#0  0xc06cdf06 in cpu_reboot ()
#1  0xc0918752 in vpanic ()
#2  0xc09187dc in panic ()
#3  0xc096ad3a in trap ()
#4  0xc010ce78 in alltraps ()
#5  0xdc125f0c in ?? ()
#6  0xc09ee48c in usb_task_thread ()
#7  0xc0100321 in lwp_trampoline ()

Backtrace #2 (this happens occasionally):

0xc06cdf06 in cpu_reboot ()
(gdb) bt
#0  0xc06cdf06 in cpu_reboot ()
#1  0xc0918752 in vpanic ()
#2  0xc09187dc in panic ()
#3  0xc096ad3a in trap ()
#4  0xc010ce78 in alltraps ()
#5  0xdd99fbe0 in ?? ()
#6  0xc0300082 in ehci_allocm ()
#7  0xc09f2123 in usbd_transfer ()
#8  0xc09f248c in usbd_open_pipe_intr ()
#9  0xc09c525c in uhidev_open ()
#10 0xc09e7ec4 in ums_enable ()
#11 0xc0a6965a in wsmuxopen ()
#12 0xc090b40d in cdev_open ()
#13 0xc08f4125 in spec_open ()
#14 0xc0a474e4 in VOP_OPEN ()
#15 0xc0a31d04 in vn_open ()
#16 0xc0a2b23d in do_open ()
#17 0xc0a2b37c in do_sys_openat ()
#18 0xc0a2b442 in sys_open ()
#19 0xc093ccff in syscall ()
#20 0xc010055d in Xsyscall ()
#21 0xdd99ffa8 in ?? ()

Here is the dmesg:

uvm_fault(0xc0ff0d00, 0x62756000, 1) -> 0xe
fatal page fault in supervisor mode
trap type 6 code 0 eip c09f2e0f cs 8 eflags 210246 cr2 62756877 ilevel 0 
esp c4bf0324
curlwp 0xc4b73d20 pid 0 lid 38 lowest kstack 0xdc1242c0
panic: trap
cpu0: Begin traceback...
vpanic(c0dc7a1b,dc125e84,dc125f00,c096ad3a,c0dc7a1b,dc125f0c,dc125f0c,26,dc1242c0,210246) 
at netbsd:vpanic+0x121
snprintf(c0dc7a1b,dc125f0c,dc125f0c,26,dc1242c0,210246,62756877,0,c4bf0324,c0fa6d20) 
at netbsd:snprintf
trap_tss() at netbsd:trap_tss
--- trap via task gate ---
c4bf0324:
cpu0: End traceback...