From owner-freebsd-current@FreeBSD.ORG Sun Sep 5 14:56:39 2004 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 1649116A4CE; Sun, 5 Sep 2004 14:56:39 +0000 (GMT) Received: from fledge.watson.org (fledge.watson.org [204.156.12.50]) by mx1.FreeBSD.org (Postfix) with ESMTP id AE1D843D2D; Sun, 5 Sep 2004 14:56:38 +0000 (GMT) (envelope-from robert@fledge.watson.org) Received: from fledge.watson.org (localhost [127.0.0.1]) by fledge.watson.org (8.12.11/8.12.11) with ESMTP id i85Erqlh005961; Sun, 5 Sep 2004 10:53:52 -0400 (EDT) (envelope-from robert@fledge.watson.org) Received: from localhost (robert@localhost)i85Erprd005958; Sun, 5 Sep 2004 10:53:51 -0400 (EDT) (envelope-from robert@fledge.watson.org) Date: Sun, 5 Sep 2004 10:53:51 -0400 (EDT) From: Robert Watson X-Sender: robert@fledge.watson.org To: Maxim Maximov In-Reply-To: <413AD651.2030504@mcsi.pp.ru> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII cc: dwhite@freebsd.org cc: current@freebsd.org Subject: Re: KQUEUE/TTY related panic X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 05 Sep 2004 14:56:39 -0000 On Sun, 5 Sep 2004, Maxim Maximov wrote: > Just got a panic when dropped into DDB by Ctrl-Alt-Esc, issued > 'show witness', pressed ScrLk, pressed PgUp ten times, then PgDn. Then > released cursor by pressing ScrLk again. This is pretty much identical to the panic Jan Srzednicki reported, wherein the syscons code under DDB calls into the TTY code (and really shouldn't). The low level polled console I/O routines are not supposed to mess with schedulers, etc, etc. CC'ing Doug White since he expressed some interest in all this :-). Robert N M Watson FreeBSD Core Team, TrustedBSD Projects robert@fledge.watson.org Principal Research Scientist, McAfee Research > > db> panic: blockable sleep lock (sleep mutex) tty @ > /usr/src/sys/kern/kern_event.c:1450 > cpuid = 0 > boot() called on cpu#0 > Uptime: 2m22s > > Machine freezes completely here. Keys didn't work. Reset helped. > Tried exactly the same actions after reboot - exactly same effect. > Machine is SMP, HTT, WITNESS enabled, today's HEAD. > Dmesg is at http://mcsi.pp.ru/dmesg.boot > > -- > Maxim Maximov > _______________________________________________ > freebsd-current@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org" >