Date: Sun, 16 Jun 1996 17:22:05 -0700 From: David Greenman <davidg@Root.COM> To: "Jeffrey D. Wheelhouse" <jdw@wwwi.com> Cc: freebsd-stable@freebsd.org Subject: Re: Trap 12/supervisor read, page not present Message-ID: <199606170022.RAA06364@Root.COM> In-Reply-To: Your message of "Sun, 16 Jun 1996 12:30:49 PDT." <199606161932.MAA03996@voltimand.csd.wwwi.com>
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>At 05:34 AM 6/15/96 -0700, you wrote: >> This appears to be a "known" bug. I didn't notice in your original message; >>was this with 2.1R or a recent SUP of -stable? > >Both, with -stable sup'd on Friday. I resupped yesterday and got >rev 1.22.4.4 of vm_map.c, and built a new kernel with that (old one >was 1.22.4.2). > >Now the machine reboots every few hours with nothing at all in the >dmesg and savecore reports "no core dump." Perhaps there is something >else I am doing wrong? Bad hardware? My machine isn't pounding nearly >as hard as, say, ftp.cdrom.com. I've been running this same kernel code for the past 40 hours while running my "thrash" regression test (which consists of about a dozen parallel compiles, a fork-exec-exit endless loop, some filesystem traversal scripts, top, and about a half dozen other things that excercise networking and other parts of the system. I haven't had any problems. I'm running a variant of this code on wcarchive (ftp.cdrom.com) that is slightly older and doesn't contain all of the fixes, and it's been up now for 5 days (load is around 700 users much of the time). ...so I'm at a loss to explain your instability problems. It would help if you could describe the hardware you're using, your kernel configuration, and the kind of load that is on the machine. >I have avoided DDB until now because since I've never used FreeBSD before, >and I know the BSDI kernel debugger can cause the system to wait for >operator input before rebooting. Now I will break down and install it. >I will speak again if that helps me learn something. In the meantime, if >you have any advice, or know of any other way in which I can help, please >let me know. If you're not having some kind of hardware problem, then the instability must be caused by the specific set things that are running on the machine. -DG David Greenman Core-team/Principal Architect, The FreeBSD Project
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