From owner-freebsd-current Mon Nov 30 00:34:54 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id AAA03071 for freebsd-current-outgoing; Mon, 30 Nov 1998 00:34:54 -0800 (PST) (envelope-from owner-freebsd-current@FreeBSD.ORG) Received: from lenka.ph.ipex.cz (lenka.ph.ipex.cz [62.168.16.2]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id AAA03066 for ; Mon, 30 Nov 1998 00:34:52 -0800 (PST) (envelope-from kan@sti.cz) Received: from linux.sti.cz (linux.sti.cz [62.168.16.129]) by lenka.ph.ipex.cz (8.8.5/IPEX) with ESMTP id JAA17266 for ; Mon, 30 Nov 1998 09:34:47 +0100 Received: from sti.cz (kan.sti.cz [192.168.0.18]) by linux.sti.cz (8.8.7/8.7.3) with ESMTP id KAA01045 for ; Mon, 30 Nov 1998 10:39:22 +0100 Message-ID: <366258D8.FEB15254@sti.cz> Date: Mon, 30 Nov 1998 09:35:37 +0100 From: "Alexander N. Kabaev" X-Mailer: Mozilla 4.5 [en] (X11; I; FreeBSD 3.0-CURRENT i386) X-Accept-Language: en MIME-Version: 1.0 To: current@FreeBSD.ORG Subject: Re: kern_clock.c (was: video mode switching has gone south) References: <199811300431.PAA20359@godzilla.zeta.org.au> Content-Type: text/plain; charset=koi8-r Content-Transfer-Encoding: 7bit Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG I am experiencing this problem on a Pentium II 350MHz box running FreeBSD-current as of November 25th. Applying proposed patch solved the problem. Bruce Evans wrote: > >> My system is running a Cyrix 686MX PR266, so this doesn't seem to be > >> limited to the AMD processors. > > > >Well, it affects my laptop also (Intel Pentium 200MHz MMX). I do > >not run xntpd, but I am running the kernel at HZ=1000. > > Increasing HZ certainly amplifies the old bug. The timecounters will > cycle every NTIMECOUNTER/hz seconds, and problems occur if handling a > bunch of interrupts (or one heavweight interrupt) ever takes longer > than this. You need to increase NTIMECOUNTER to 10 times what would > work for HZ=100. > > Bruce > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-current" in the body of the message To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message