From owner-freebsd-stable Mon May 10 12:20:30 1999 Delivered-To: freebsd-stable@freebsd.org Received: from granite.sentex.net (granite.sentex.ca [199.212.134.1]) by hub.freebsd.org (Postfix) with ESMTP id 15CB714E37 for ; Mon, 10 May 1999 12:20:26 -0700 (PDT) (envelope-from mike@sentex.net) Received: from simoeon (simeon.sentex.ca [209.112.4.47]) by granite.sentex.net (8.8.8/8.6.9) with SMTP id PAA19431; Mon, 10 May 1999 15:20:11 -0400 (EDT) Message-Id: <3.0.5.32.19990510151933.017f1b90@staff.sentex.ca> X-Sender: mdtpop@staff.sentex.ca X-Mailer: QUALCOMM Windows Eudora Light Version 3.0.5 (32) Date: Mon, 10 May 1999 15:19:33 -0400 To: Cy Schubert - ITSD Open Systems Group From: Mike Tancsa Subject: vm_fault deadlock and PR 8416 (was Re: Strange reboot saga ) Cc: freebsd-stable@freebsd.org In-Reply-To: <199905101912.MAA34150@passer.osg.gov.bc.ca> References: Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG At 12:11 PM 5/10/99 -0700, Cy Schubert wrote: >I remember trying this exploit about a month ago when it was first >announced. It locked the system up solid within seconds. After >applying the patches from PR 8416 I currently have four copies of >find and one tripwire running for over an hour and a half, with no >hang. The patches from PR 8416 appear to have fixed the hang. That is most excellent... Is there any reason why this patch has not been applied to the tree ? i.e. does it have any adverse side effects preventing it from being committed ? ---Mike >In message <4.1.19990509174640.0534ef10@granite.sentex.ca>, Mike >Tancsa writes: >> At 05:05 PM 5/9/99 , Cy Schubert - ITSD Open Systems Group wrote: >> > >> >In message <19990507220718.B31932@relay.ucb.crimea.ua>, Ruslan Ermilov >> >writes: >> >> Just FYI: >> >> >> >> $ uname -r; uptime >> >> 2.2.1-RELEASE >> >> 10:02PM up 115 days, 5:57, 1 user, load averages: 0.00, 0.09, 0.14 >> >> (last reboot was due to ) >> >> >> >> $ uname -r; uptime >> >> 3.1-STABLE >> >> 10:02PM up 8 days, 11:07, 6 users, load averages: 0.27, 0.17, 0.11 >> >> (last reboot was due to system freeze) >> > >> >You know the strange thing about these freezes is that they don't occur >> >on every system. For example, I manage four 3.1R systems and a 2.2.8R >> >system. Three of the 3.1 systems are rock solid. The fourth one, >> >which also happens to have the fastest clock speed (333MHz PII in a >> >Dell), has frozen four times since February while I was running >> >tripwire 1.3 with -interactive, during phase 4 file checks, and >> >starting netscape, and restoring exmh2 from an icon. The system is >> >doing A LOT of paging at the time of the hangs. PR 8416 might hold >> >some promise of fixing this. >> >> Perhaps its related to the mmap bug.. I think I have been hit by it once on >> one of my systems... >> >> e.g. >> find / -type f -exec grep zztop "{}" \; & >> find / -type f -exec grep zztop "{}" \; & >> >> will lock a 3.x box solid. ------------------------------------------------------------------------ Mike Tancsa, tel 01.519.651.3400 Network Administrator, mike@sentex.net Sentex Communications www.sentex.net Cambridge, Ontario Canada To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message