From mboxrd@z Thu Jan 1 00:00:00 1970 From: Pete Zaitcev Subject: Re: usb_mon oops Re: tcpdump crashes 2.6.29.1 (and 2.6.29-rc5) Date: Fri, 10 Apr 2009 00:24:35 -0600 Message-ID: <20090410002435.52794220.zaitcev@redhat.com> References: <18906.49779.243047.207639@stoffel.org> <20090407120022.GA6519@ff.dom.local> <18907.28788.965069.573489@stoffel.org> <20090407130403.e0061a8d.zaitcev@redhat.com> <18908.42166.404232.721757@stoffel.org> <20090408232344.afed8103.zaitcev@redhat.com> <18910.46709.707557.135033@stoffel.org> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Cc: Jarek Poplawski , linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-usb-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, zaitcev-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org To: "John Stoffel" Return-path: In-Reply-To: <18910.46709.707557.135033-HgN6juyGXH5AfugRpC6u6w@public.gmane.org> Sender: linux-usb-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: netdev.vger.kernel.org On Thu, 9 Apr 2009 23:01:09 -0400, "John Stoffel" wrote: > Any suggestions of a known good state I should start bisection from? No suggestions, sorry. The part of usbmon that peeks at DMA-ed data wasn't touched since December 2006. It worked fine since then, your oops is the first. So, I don't expect bisection to help. At best you're going to find the commit where uvcvideo was merged. The right way forward is to deduce what's going on, IMHO. Maybe usbmon is trying to take an address in the GART aperture and convert it into a struct page. Or the direction in URB mismatches endpoint. Or any number of other things. I'm working on it, but I'm not done with puzzling out the dmesg you sent me, sorry again. -- Pete -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html