vm_map.c lock up (Was: Re: NFS Locking Issue)
freebsd at hub.org
Sat Jul 15 03:28:05 UTC 2006
On Sat, 15 Jul 2006, User Freebsd wrote:
> On Wed, 5 Jul 2006, Robert Watson wrote:
>> If you can get into DDB when the hang has occurred, output via serial
>> console for the following commands would be very helpful:
>> show pcpu
>> show allpcpu
>> show locks
>> show alllocks
>> show uma
>> show malloc
>> show lockedvnods
> 'k, after 16 days uptime, the server that I got all the debugging turned on
> for finally hung up solid ... I was able to break into DDB over the serial
> link, and have run all of the above on it ... and the output is attached ...
> One thing to note is that the ps listing is not complete ... there are >6k
> processes running at the time, and I don't know how to get rid of the
> '--more--' prompt :( After 1k processes, I just hit 'q' and went onto the
> other commands ...
> Also, traceall gave me a 'No such command' error ... now that I think about
> it, my luck, it was supposed to be 'trace all'?
> If this doesn't provide enough information, please let me know what else I
> should do the next time through, besides the above commands ...
> Oh, and how do you get DDB to 'dump core' in 6.x? Back in 4.x days, I'd just
> do 'panic' (maybe twice) at the DDB prompt, but that didn't work with 6.x ...
> it just gave me a stacktrace and then the DDB> prompt both times ...
Quick appendum ... the kernel on this server is from June 28th of this
Marc G. Fournier Hub.Org Networking Services (http://www.hub.org)
Email . scrappy at hub.org MSN . scrappy at hub.org
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