From owner-freebsd-hackers Fri May 5 21:56:54 2000 Delivered-To: freebsd-hackers@freebsd.org Received: from rover.village.org (rover.village.org [204.144.255.49]) by hub.freebsd.org (Postfix) with ESMTP id 7473337B58E for ; Fri, 5 May 2000 21:56:50 -0700 (PDT) (envelope-from imp@harmony.village.org) Received: from harmony.village.org (harmony.village.org [10.0.0.6]) by rover.village.org (8.9.3/8.9.3) with ESMTP id WAA32927; Fri, 5 May 2000 22:56:49 -0600 (MDT) (envelope-from imp@harmony.village.org) Received: from harmony.village.org (localhost.village.org [127.0.0.1]) by harmony.village.org (8.9.3/8.8.3) with ESMTP id WAA59299; Fri, 5 May 2000 22:56:42 -0600 (MDT) Message-Id: <200005060456.WAA59299@harmony.village.org> Subject: Re: Can NMI drop a hanging FreeBSD kernel into DDB? To: Alfred Perlstein , Jin Guojun , hackers@FreeBSD.ORG In-reply-to: Your message of "Fri, 05 May 2000 22:53:00 MDT." <200005060453.WAA59241@harmony.village.org> References: <200005060453.WAA59241@harmony.village.org> <20000505122029.C29830@fw.wintelcom.net> <200005051831.LAA25307@george.lbl.gov> Date: Fri, 05 May 2000 22:56:42 -0600 From: Warner Losh Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG In message <200005060453.WAA59241@harmony.village.org> Warner Losh writes: : However, it won't work if you are hacking pci hardware and manage to : hang the PCI bus. Unless, of course, the trap handler is in cache as well as the debugger routines you need. On rare occasions this is true, but almsot all the time it isn't. There's not a good way to force it either since if you knew you were about to hang the pci bus, you'd not do the action that would hang it :-). Warner To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message