9.2-RELEASE amd64 panic: vn_open_cred

[Matt Magoffin]

On Nov 9, 2013, at 5:03 PM, Matt Magoffin <matt at msqr.us> wrote:

> On Nov 8, 2013, at 9:09 PM, Konstantin Belousov <kostikbel at gmail.com> wrote:
> 
>>> 	if (vop->vop_add_writecount != NULL)
>>> 		rc = vop->vop_add_writecount(a);
>> But, if I mis-counted and the line 4236 is that one ^^^^, than together
>> with the panic message
>> panic: vm_fault: fault on nofault entry, addr: ffffff836e0fc000
>> which suggests that vop_add_writecount not NULL but garbage, I believe
>> that your issue is stale module, compiled on 9.1 but used on 9.2.
> 
> The line you refer to here is line 4236. So, I shall have to attempt the upgrade again, and verify that all modules loaded were built under 9.2. I believe only pefs.ko is one I built myself, and all others came with the system... and freebsd-update would have updated those modules (in /etc/freebsd-update.conf I have "Components src world kernel".
> 
> When I have a time where I can attempt the update again, I will reply with my findings.

I went through the upgrade steps again, and this time was very careful to ensure I re-compiled pefs.ko after upgrading, and before attempting to use it. The system has been running without any panics for a few hours now, which seems to validate your findings.

Thank you again for you assistance,
Matt 
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