From owner-freebsd-current Mon Jan 15 11:48: 2 2001 Delivered-To: freebsd-current@freebsd.org Received: from meow.osd.bsdi.com (meow.osd.bsdi.com [204.216.28.88]) by hub.freebsd.org (Postfix) with ESMTP id E8B4D37B404 for ; Mon, 15 Jan 2001 11:47:19 -0800 (PST) Received: from laptop.baldwin.cx (john@jhb-laptop.osd.bsdi.com [204.216.28.241]) by meow.osd.bsdi.com (8.11.1/8.9.3) with ESMTP id f0FJjj191208; Mon, 15 Jan 2001 11:45:45 -0800 (PST) (envelope-from jhb@FreeBSD.org) Message-ID: X-Mailer: XFMail 1.4.0 on FreeBSD X-Priority: 3 (Normal) Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 8bit MIME-Version: 1.0 In-Reply-To: Date: Mon, 15 Jan 2001 11:47:16 -0800 (PST) From: John Baldwin To: Garance A Drosihn Subject: RE: Anybody else seeing a broken /dev/lpt with SMP on -current? Cc: current@FreeBSD.org, Jordan Hubbard Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On 14-Jan-01 Garance A Drosihn wrote: > At 6:55 PM -0800 1/12/01, John Baldwin wrote: >>On 13-Jan-01 Jordan Hubbard wrote: >> > If anybody wants a fuller traceback then I'll compile up a kernel >> > with debugging symbols, but it's going to be pretty sparse anyway >> > since it basically only shows the trap() from the page fault and >> > the subsequent panic. >> >>All the other traces show the kernel having returned to an address >>that is beyond the end of the kernel (which causes the page fault) >>meaning that the stack is fubar'd, so the trace isn't meaningful >>anyways. :( Knowing how and why the lpd interrupt handler trashes >>the stack is the useful info, and with the stack already trashed, >>I don't know of an easy way to figure that out. > > Do you really mean the "lpd interrupt handler", or do you mean > the "lpt interrupt handler"? Does this problem only happen when > lpd is sending data thru /dev/lpt? lpt interrupt handler, yes. -- John Baldwin -- http://www.FreeBSD.org/~jhb/ PGP Key: http://www.baldwin.cx/~john/pgpkey.asc "Power Users Use the Power to Serve!" - http://www.FreeBSD.org/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message