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Date:      Sun, 10 Nov 2013 19:58:39 +1300
From:      Matt Magoffin <matt@msqr.us>
To:        Konstantin Belousov <kostikbel@gmail.com>
Cc:        Eric van Gyzen <eric@vangyzen.net>, freebsd-stable@freebsd.org
Subject:   Re: 9.2-RELEASE amd64 panic: vn_open_cred
Message-ID:  <97D6E62B-E4B0-4DF6-9EB9-028F68A42FA0@msqr.us>
In-Reply-To: <938A1914-6510-4F93-9C40-E22BB0E69D08@msqr.us>
References:  <DF88429C-058E-4756-AFC4-F97249FF54AA@msqr.us> <20131106022932.GY59496@kib.kiev.ua> <57A9579D-7BA6-4ED8-9EE0-D2B5949F8D26@msqr.us> <20131106035350.GC59496@kib.kiev.ua> <D0BA9FE0-8CF2-4221-85A0-27EED6A48048@msqr.us> <527A6012.2050500@vangyzen.net> <60595DA5-A339-4FA5-99FD-FC25591A6BDA@msqr.us> <20131107230834.GS59496@kib.kiev.ua> <FE60BFFA-366F-4033-B033-E1D950CCCA3E@msqr.us> <20131108080938.GT59496@kib.kiev.ua> <938A1914-6510-4F93-9C40-E22BB0E69D08@msqr.us>
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[-- Attachment #1 --]
On Nov 9, 2013, at 5:03 PM, Matt Magoffin <matt@msqr.us> wrote:

> On Nov 8, 2013, at 9:09 PM, Konstantin Belousov <kostikbel@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 
[-- Attachment #2 --]
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