Hello,
Thank you all for your kind relpies to my question. I apologize for not
including a subject line, or various information about my machine.
My original question was:
> Hi,
>
> I have been having the following problem. I think it may be connected
> with the fact that I have a SparcPrinter hooked up to this machine. What
> could be the problem? Has anyone ever seen this error before?
>
> Thanks,
>
> Michael A. Meystel
> Drexel University
> meystel@impaqt.drexel.edu
>
> vmunix: assertion failed: pmg->pmg_keepcnt == 1, file: ../../sun4/vm_hat.c,
> line: 2452
> vmunix: panic: assertion failed
> vmunix: syncing file systems... done
> vmunix: 00000 low-memory static kernel pages
> vmunix: 01038 additional static and sysmap kernel pages
> vmunix: 00000 dynamic kernel data pages
> vmunix: 00146 additional user structure pages
> vmunix: 00000 segmap kernel pages
> vmunix: 00000 segvn kernel pages
> vmunix: 00000 current user process pages
> vmunix: 00051 user stack pages
> vmunix: 01235 total pages (1235 chunks)
I received several responses, and all of them point to two facts:
This problem is fixed by patch 100273-01 or by upgrading from SunOS 4.1.1
(which is indeed what I am running). It seems to be fixed in 4.1.2 and 4.1.3.
Here is a piece of one esteemed colleague's explanation of this problem
(thanks to Aydin Edguer <edguer@alpha.CES.CWRU.Edu>:
- > long explanation: under certain high loads, the MMU sometimes
- > gets inconsistent with the software page tables. there's probably
- > some race condition in the hardware address translation (hat)
- > code that causes this and some other VM-related panics.
Thanks again for your patience and help.
Sincerely,
Michael A. Meystel
Systems & Network Administration
IMPAQT Center, College of Engineering
Drexel University, Philadelphia, PA USA
+ 1 215 895 5807 / meystel@impaqt.drexel.edu
P.S. Several people replied complaining that they would never buy another
SparcPrinter because they ran into this problem. But I am unsure that this
is SparcPrinter specific...is it? Has anyone ever connected anything other
than a Sun SparcPrinter and received the same error (for instance, an HP
LaserJet series printer...)?
This archive was generated by hypermail 2.1.2 : Fri Sep 28 2001 - 23:08:04 CDT