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

From: Marcel Moolenaar <xcllnt_at_mac.com>
Date: Tue, 28 Jul 2009 08:32:06 -0700
On Jul 28, 2009, at 3:35 AM, 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.

Do you have MCA records?

>
> Is it possible that some kernel variable needs to
> be increased? E.g. kern.maxproc, kern.maxfiles, etc.

No need.

-- 
Marcel Moolenaar
xcllnt_at_mac.com
Received on Tue Jul 28 2009 - 13:33:13 UTC

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