Date: Mon, 17 Jun 1996 23:45:57 -0700 From: David Greenman <davidg@Root.COM> To: Juergen Lock <nox@jelal.hb.north.de> Cc: stable@freebsd.org Subject: Re: Trap 12/supervisor read, page not present Message-ID: <199606180645.XAA01247@Root.COM> In-Reply-To: Your message of "Tue, 18 Jun 1996 08:16:00 %2B0200." <199606180616.IAA10166@saturn.hb.north.de>
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>> Like I said, this is a "known" problem. What I don't understand is why you >>see it happen so often. It takes literally *months* of heavy system activity >>for me to reproduce this sometimes, which is why it has taken so long to fix >>it. We'll be looking at this problem again this week, but I can give no > >Hmm. im not deep enough inside the vm code to take a guess whether >it may be related or not but, i just made a new -stable kernel again >(now ctm-cvs-cur 2130) and the hold count problem (kern/1195) is >still there. system just booted, otherwise completely idle except for >a few xterms and a xperfmon: after having written stables /usr/obj this >time i have 21 of those (DIAGNOSTIC-panic-patched-into-printf, see PR) >messages on the xconsole... > >find obj | afio -G 2 -o -v -f -b 5120 -c 1000 -s 100000x -Z /dev/nrst0 >(this was the test. CPU 486dx100, tape Wangtek 525ES, PCI NCR SCSI.) This appears to be caused by an unrelated bug in the physio code. > ATB and sorry if this is old news and of no use I appreciate all the information you've provided on the problem. I'll be looking forward to having you test a fix if/when we come up with one for the "invalid kernel page directory" problem (and perhaps also the bug you've reported above). >PS: is the Root.COM a real address? i cant nslookup right now >(still no flat rates in germany), therefore cc'd to the list... Of course. -DG David Greenman Core-team/Principal Architect, The FreeBSD Project
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