Date: Sun, 12 Jul 1998 20:04:30 +0200 (CEST) From: Holm Tiffe <freebsd@magnet.geophysik.tu-freiberg.de> To: tlambert@primenet.com (Terry Lambert) Cc: freebsd-current@FreeBSD.ORG Subject: Re: Arrgh ! resubscribing again again again.... Message-ID: <199807121804.UAA07724@magnet.geophysik.tu-freiberg.de> In-Reply-To: <199807120621.XAA29796@usr07.primenet.com> from Terry Lambert at "Jul 12, 98 06:21:52 am"
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> > TL> You don't *have* to do that. You *could* shutdown your X server and > > TL> restart it. You simply choose to have your demons die, instead of > > TL> doing this and/or limiting the amount of VM available to the X server > > TL> and Netscape, or disabling the X shm extensions. > > > > Terry, your explanation is ok. But what X-server should I shutdown? > > For I don't have any X's. And yesterday I repeated 'make -j64 buildworld', > > and as always: sendmail childs die with SIGSEGV, cron seems to be in > > memory, but no cron jobs run. And all that after makeworld has finished, > > system is _absolutely_ idle. > > Interesting. Clearly, you're not the person running Netscape to > cause a similar problem. 8-). I'am that person, but Terry I have never sayed that this problem only occurs when I run netscape ! This was only an easy to reproduce example, any big job on that lousy 486 triggers the same set of problems. > > Do you have any zombie processes? > No zombies at all, but childs from system programs and any other program that was paget out, are getting killed by a segfault. Non - forking programs in the background are runnig fine so far. Maybe that fork's copy from the process space gets corrupted after an VM exhaust ? > Have you looked at the vmstat output? > > If you kill -HUP cron, what happens? > > If you kill -HUP sendmail, what happens? > I'll try that. > Did you get any errors in the buildworld, or did it complete without > damaging itself (only damaging sendmail and cron)? > Long time ago, that I have build worlds on that machine. Installworld is working fine. > Are you overclocking your CPU? No. > > How much memory do you have -- is it enough that if you missed a > refresh cycle or two (say, because you did something silly, like > a buildworld with -j64 and you have an Adaptec controller with a > high bus-on time, or you are using a PIO IDE controller, etc...), > that the upper memory contents might degrade and cause these problems? Terry Terry, there are several guys here, all claiming about the same refresh problem ? Oh no. This is easy to reproduce, just put memory out of your computer and let run big jobs. [..] > > It would be nice to know if this problem was the result of running > out of VM, or if you can cause it by load without actually exhasting > the VM... > > Makeworld takes a while; have you tried putting a crontab entry that > spits the time out to the console once a minute, and bracketing the > buildworld with "date"? Interesting idea. > > Maybe it's a particular section of the tree, and not the load, that's > getting you? Perhaps that region of the disk is corrupt? And that netscape thing by me ? I'll try to give you an other example tomorrow. Holm -- ******************************************************************************* * Holm Tiffe holm@geophysik.tu-freiberg.de * * Freiberger Strasse 24 * * 09600 Kleinschirma, Germany Microsoft is not the Answer - * * Tel.: 49 3731 74233 Microsoft is the Question, * * UUCP: 49 3731 73719 unicorn!holm and the Answer is no ! * ******************************************************************************* To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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