kernel page fault panic in yesterday's current ( nfs_nget -> vfs_hash_insert -> bcmp )

Bjoern A. Zeeb bzeeb-lists at lists.zabbadoz.net
Thu Mar 17 22:55:10 PST 2005


On Fri, 18 Mar 2005, Jonas wrote:

Hi,

> On Thu, 17 Mar 2005 18:11:25 -0800 (PST)
> Don Lewis <truckman at FreeBSD.org> wrote:
>
> > I got this panic when running cvs to cvs update my /usr/ports tree in
> > preparation for updating to today's kernel, world, and ports.
>
> > I'm going to go ahead with the kernel and world update and see if the
> > problem is reproduceable afterwards.
>
> i also get a 'lock order reversal' but already at boot time.
> i'm using the bfe driver from the sources of  Fri Mar 18 03:06:05 CET 2005
...
> lock order reversal
>  1st 0xc1dde8a0 rtentry (rtentry) @ /usr/src/sys/netinet/if_ether.c:445
>  2nd 0xc1be1364 bfe0 (network driver) @ /usr/src/sys/dev/bfe/if_bfe.c:1341


this is one is the same like with sk, bge, ... seen lately. As already
said - I had been told there is work in progress.
I'll add it to 'the LOR page'[1] later today.

[1] see: http://www.freebsd.org/doc/faq/troubleshoot.html#LOCK-ORDER-REVERSAL


For debugging of the page fault you might want to setup serial console:
http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/serialconsole-setup.html
and save the output (minicom -C .., cu .. | tee -a ... | just paste).

-- 
Bjoern A. Zeeb				bzeeb at Zabbadoz dot NeT


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