From owner-freebsd-hackers Fri May 5 11:49:39 2000 Delivered-To: freebsd-hackers@freebsd.org Received: from fw.wintelcom.net (ns1.wintelcom.net [209.1.153.20]) by hub.freebsd.org (Postfix) with ESMTP id B6DE737BBB2 for ; Fri, 5 May 2000 11:49:37 -0700 (PDT) (envelope-from bright@fw.wintelcom.net) Received: (from bright@localhost) by fw.wintelcom.net (8.10.0/8.10.0) id e45JKTA04133; Fri, 5 May 2000 12:20:29 -0700 (PDT) Date: Fri, 5 May 2000 12:20:29 -0700 From: Alfred Perlstein To: Jin Guojun Cc: hackers@FreeBSD.ORG Subject: Re: Can NMI drop a hanging FreeBSD kernel into DDB? Message-ID: <20000505122029.C29830@fw.wintelcom.net> References: <200005051831.LAA25307@george.lbl.gov> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 1.0.1i In-Reply-To: <200005051831.LAA25307@george.lbl.gov>; from jin@george.lbl.gov on Fri, May 05, 2000 at 11:31:39AM -0700 Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG * Jin Guojun [000505 12:03] wrote: > Hi, > > I am currently experimenting kernel hanging problem even through I have > compiled the kernel with DDB enabled. > > How can I make a hanging kernel into DDB? Will grounding the NMI do it? > > Thanks for any suggestions, That's a bit extreme. hit ctrl+alt+esc on the console, or send a serial break if using a serial console, make sure you have BREAK_TO_DEBUGGER if you're using a serial console. -- -Alfred Perlstein - [bright@wintelcom.net|alfred@freebsd.org] "I have the heart of a child; I keep it in a jar on my desk." To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message