[DragonFlyBSD - Bug #2686] kernel 3.8.1 freezes and panics at boot

[bugtracker-admin at leaf.dragonflybsd.org]

Issue #2686 has been updated by peeter.


It would be helpful if one could get a dumpsys. Since the keyboard is hung/frozen, I tried to "fake" a call dumpsys by brute force: I hardcoded in the 

sys/ddb/db_lex.c: db_read_line()

that it returns "call dumpsys" to 

sys/ddb/db_input.c: db_readline()

And so indeed it went to 

sys/kern/kern_shutdown.c: dumpsys()

but alas: in that routine, the if condition at line 913

dumper.dumper != NULL

failed and no dumpsys. I do not know how to correctly initialize the dumper struct so dumpsys is executed. Any ideas how to do that? 

Figuring out why the keyboard does not work might be harder since with FreeBSD keyboard hangs too when the kernel drops to ddb immediately after booting. 


----------------------------------------
Bug #2686: kernel 3.8.1 freezes and panics at boot
http://bugs.dragonflybsd.org/issues/2686#change-12685

* Author: peeter
* Status: New
* Priority: Normal
* Assignee: profmakx
* Category: 
* Target version: 
----------------------------------------
DFly 3.6.x x86_64 boots and runs fine on my laptop
(macbookpro5,5), the 3.8.1 install iso freezes at boot. (acpi/ehci
disabled in both cases.) These are the last lines before freezing
[boot_verbose=YES]:

--- ---
pci0: <processor> (vendor 0x10de, dev 0x0aa3) at device 3.5 irq 14
ohci0.pci0.pcib0.legacy0.nexus0.root0
ohci0: <nVidia nForce MCP79 USB Controller> [tentative] mem
0xd3488000-0xd3488fff irq 11 at device 4.0 on pci0
ohci0: Reserved 0x1000 bytes for rid 0x10 type 3 at 0xd3488000
---FREEZE---

Since 3.6.x boots and runs fine (with acpi disabled) on this machine, 
I thought the freeze was related to the new usb. So upgraded
3.6.2 to 3.8.1 via git, did buildworld and buildkernel with WANT_OLDUSB=yes
in /etc/make.conf. The system now panics at boot, showing
[boot_verbose=YES]:

---3.8.1-oldusb---
fwohci0: <1394 Open Host Controller Interface> [tentative] mem
0xd3100000-0xd3100fff irq 7 at device 0.0 on pci4
fwohci0: latency timer 0 -> 32.
fwohci0: cache size 64 -> 64.
fwohci0: Reserved 0x1000 bytes for rid 0x10 type 3 at 0xd3100000
---panic---

and then giving the db> prompt but because it freezes, or at least the
keyboard freezes, I can't call dumpsys. So unfortunately there's no
crash dump. I could then boot and run the system with the old 3.6.2
kernel.

Further: since fwohci0 was the last line in the previous message, I 
recompiled the 3.8.1 kernel without firewire: 

---
# FireWire support
#device		firewire	# FireWire bus code
#device		sbp		# SCSI over FireWire (Requires scbus and da)
#device		fwe		# Ethernet over FireWire (non-standard!)
---

This causes kernel panic much later in the boot at umass and gives a db> prompt
that is functional but call dumpsys returns only 0 and there is no still no core dump. 


I also tried booting FreeBSD 10.0 to see how the (new) usb stack
fares. It boots fine. I attach the verbose dmesg for both FBSD 10 and
DFly 3.6.2 just in case.

I wonder if there's a way to get a debug or dumpsys for 3.8? Could
vkernel help or is it isolated from hardware?

Thanks

Peeter

--


---Files--------------------------------
DFly-3.6-verbose.dmesg (41.3 KB)
FBSD-10.0-verbose.dmesg (61.6 KB)
dfly-3.6-x86_64-macbookpro5,5-acpidump-b.tgz (10.4 KB)
0001-Program-PAT-indices-5-as-WP-from-default-WT-and-6-as.patch (1.4 KB)
no-prt-found-dragonfly-boot-crash.jpg (842 KB)
dragonfly-boot-crash-verbose-no-prt.png (479 KB)


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