From mboxrd@z Thu Jan 1 00:00:00 1970 From: Konrad Rzeszutek Wilk Subject: Re: [Xen-devel] BUG: bad page map under Xen Date: Wed, 23 Oct 2013 12:04:33 -0400 Message-ID: <20131023160433.GA28260@phenom.dumpdata.com> References: <52652534.2040303@oracle.com> <526545E002000078000FC5F1@nat28.tlf.novell.com> <52652E95.3020305@oracle.com> <20131021140607.GQ20913@ics.muni.cz> <20131021141855.GA4211@phenom.dumpdata.com> <5265560602000078000FC73E@nat28.tlf.novell.com> <20131021144407.GC4560@phenom.dumpdata.com> <5265609802000078000FC7B7@nat28.tlf.novell.com> <20131023153645.GA28011@phenom.dumpdata.com> <5267FD3102000078000A56A1@nat28.tlf.novell.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <5267FD3102000078000A56A1-ce6RLXgGx+vWGUEhTRrCg1aTQe2KTcn/@public.gmane.org> Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Jan Beulich Cc: xhejtman-8qz54MUs51PtwjQa/ONI9g@public.gmane.org, roland-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, xen-devel-GuqFBffKawuEi8DpZVb4nw@public.gmane.org, linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: linux-rdma@vger.kernel.org On Wed, Oct 23, 2013 at 04:45:37PM +0100, Jan Beulich wrote: > >>> Konrad Rzeszutek Wilk 10/23/13 5:37 PM >>> > >On Mon, Oct 21, 2013 at 04:12:56PM +0100, Jan Beulich wrote: > >> > Were you suggesting a lookup when we scan the PCI devices? (xen_add_device)? > >> > >> That was for PVH, and is obviously fragile, as there can be MMIO > >> regions not matched by any PCI device's BAR. We could hope for > >> all of them to be below 4Gb, but I think (based on logs I got to see > >> recently from a certain vendor's upcoming systems) this isn't going > >> to work out. > > > >This is the patch I had in mind that I think will fix these issues. But > >I would appreciate testing it and naturally send me the dmesg if possible. > > So this indeed is only about PCI devices (i.e. not taking into account the > comment I made earlier [above]). Correct. What are some of those devices? It would help to understand what those are. > > Further, a brute force loop over all balloon pages seems like a pretty > bad thing to do when the balloon is rather big. Sure. > > And finally - did you check that the bus notification happens after resource > assignment? They do occur during the normal resource assigment. But I presume you meant during resource re-assigment? > > Jan > -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html