Path: utzoo!utgpu!news-server.csri.toronto.edu!bonnie.concordia.ca!thunder.mcrcim.mcgill.edu!snorkelwacker.mit.edu!stanford.edu!morrow.stanford.edu!pangea.Stanford.EDU!farrell
From: farrell@pangea.Stanford.EDU (Phil Farrell)
Newsgroups: comp.unix.ultrix
Subject: Re: Nice bug
Message-ID: <1991Apr11.184723.17625@morrow.stanford.edu>
Date: 11 Apr 91 18:47:23 GMT
References: <4780@lupine.NCD.COM>
Sender: news@morrow.stanford.edu (News Service)
Organization: Stanford Univ. Earth Sciences
Lines: 21

In article <4780@lupine.NCD.COM> glenn@bryant.NCD.COM (Glenn Shapland) 
complains that a long-running application of his will be "niced" by the 
kernel to a lower priority after a while, and he is unable to renice it
back to the original priority.  

I don't know if this is related, but DEC Ultrix Support in Atlanta just
sent me a patched version of the kernel routine kern_synch.o for 
RISC Ultrix 4.1 (in an attempt to cure an unrelated problem) with this
note on the problem it is supposed to fix:

	"Fix for process priority calculations on Mips machines.  The
	proc structure field "p_slptime" was not getting clear after
	a setrun.  This will prevent the priority for this task to get
	recalculated."

Perhaps Glenn should contact Ultrix Support to see if this is related 
to his problem.

-Phil Farrell, Computer Systems Manager
Stanford University School of Earth Sciences
farrell@pangea.stanford.edu