Re: FreeBSD 8.0-BETA2/amd64 crashes on SMP under load

Anton Shterenlikht wrote:
> On Mon, Jul 27, 2009 at 10:04:28PM +0100, Anton Shterenlikht wrote:
>> On Mon, Jul 27, 2009 at 09:55:12PM +0200, O. Hartmann wrote:
>>> Kamigishi Rei wrote:
>>>> O. Hartmann wrote:
>>>>> I have the problem of crashing FreeBSD 8.0-BETA2/amd64 under load on
>>>>> all of our SMP boxes. Is there an issue known at the moment? If not, I
>>>>> will prepare the kernel for whitnessing and provide more informations,
>>>>> if you wish.
>>>> A quick question: what is in the crash message, i.e. the backtrace?
>>>> And what kind of crash is it - a panic() or a fatal trap?
>>> On the 8-core server box, I sometimes see :
>>>
>>> Fatal trap 12: page fault while in kernel mode
>>> fault code              = supervisor read, page not present
>> Not sure if it's related, but on ia64 SMP (2 cpus) with 8.0-current and
>> later with 8.0-beta1 (I havent' built beta2 yet) I'm getting crashes
>> under load every so often. E.g buildworld -j8 is likely to crash the
>> box. No messages, just a sudden freeze, no backtrace or panic, and then reboot.
>>
>> If load is less heavy, e.g. fewer processes and some idle time, the
>> problem doesn't seem to appear.
>>
>> I'm happy to do any further testing, if suggested.
> 
> my ia64 8.0-beta1 SMP box died again on
> make -j8 buildworld
> with no panic or log entries.
> 
> Is it possible that some kernel variable needs to
> be increased? E.g. kern.maxproc, kern.maxfiles, etc.
> Or perhaps I'm talking complete rubbish..
> 
> 


I suggest you try again with a UP kernel - a suggestion from a 
kernel-nnob, sorry. My SMP boxes work now with UP-kernel, but they are 
really slowish although they have modern Intel C2D/Penryn cores.

Regards,
Oliver