From owner-freebsd-hackers Wed Oct 10 0:30:30 2001 Delivered-To: freebsd-hackers@freebsd.org Received: from mail-relay1.yahoo.com (mail-relay1.yahoo.com [216.145.48.34]) by hub.freebsd.org (Postfix) with ESMTP id 4E76A37B403 for ; Wed, 10 Oct 2001 00:30:28 -0700 (PDT) Received: from yahoo-inc.com (db-cvad-2-tmp.yahoo.com [216.145.48.243]) by mail-relay1.yahoo.com (Postfix) with ESMTP id B68C58B5D4; Wed, 10 Oct 2001 00:30:27 -0700 (PDT) Message-ID: <3BC3F91A.1492C252@yahoo-inc.com> Date: Wed, 10 Oct 2001 00:30:34 -0700 From: Doug Barton Organization: Triborough Bridge & Tunnel Authority X-Mailer: Mozilla 4.78 [en] (X11; U; Linux 2.4.2 i386) X-Accept-Language: en MIME-Version: 1.0 To: Mike Meyer Cc: hackers@FreeBSD.ORG Subject: Re: Debbuging hard lockups... References: <15297.57121.554185.659525@guru.mired.org> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG Mike Meyer wrote: > > I can generate hard lockups on my SMP box pretty easily. When locked, > it fails to respond to anything - I can't even get into the kernel > debugger to fire up. The lockups don't happen on UP machines under the > same conditions, so I can't even see if console debugging would work, > because I don't have a second SMP machine to run the kernel on. > > I'm running 4.4-stable, and I'm looking for suggestions on how to deal > with this, other than "don't do that". Debugging kernel options, maybe? How much ram do you have, and how long are you waiting? I find that it sometimes takes several minutes to dump 256M. HTH, Doug -- "We will not tire, we will not falter, and we will not fail." - George W. Bush, President of the United States September 20, 2001 Do YOU Yahoo!? To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message