PAE+SMP panic with "page fault while in kernel mode" in many
files opened situations
jason.thomson at mintel.com
Fri Mar 11 05:58:23 PST 2005
Emmanuel OTTON wrote:
> Le 11 mars 05, à 12:11, Jason Thomson a écrit :
>> If you disable the logical processors in the BIOS, this problem
>> should go away.
>> We ended up reverting to 4-STABLE for other reasons.
> Thanks for your answer.
> The problem is still there, unfortunately.
> Crashes no more on pagedaemon though, for a change, but on irq48:em0...
> Would you have KVA_PAGES / maxvnodes recommendation for this case ?
> Was your answer based on painful trial-and-error, or is there a logical
> reason (known bad HTT or PAE or Xeon support) ?
> Should I revert to 4-STABLE to get solid PAE+SMP support ?
> Emmanuel OTTON - Ecole des Mines d'Albi-Carmaux - Responsable informatique
> Tél: 05 63 49 30 86
We had KVA_PAGES=768. It's now at KVA_PAGES=672 to give us the right
balance between KVM & usable process size.
We spent a few (4 hours) trying to get 5-STABLE to work properly.
It would reliably crash when running make -j 4 buildworld.
When we disabled the logical processors in the BIOS, make -j 4
buildworld would succeed.
Also, we disabled the USB subsystem in the BIOS. I don't know whether
you have already. It looks like you haven't from your first post. This
In any case, we reverted to 4-STABLE. We needed the patches posted to
this list to enable us to use PAE + amr driver.
Since reverting it has been completely stable. (And very very fast:-)
I didn't post anything to the list regarding our problems, because we
weren't able to get a crashdump.
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