From mboxrd@z Thu Jan 1 00:00:00 1970 From: Konrad Rzeszutek Wilk Subject: Re: 3GB memory restriction for pv domU with PCI Date: Thu, 14 Oct 2010 10:23:37 -0400 Message-ID: <20101014142337.GB2727@dumpdata.com> References: <20100611164255.GA19481@phenom.dumpdata.com> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable Return-path: Content-Disposition: inline In-Reply-To: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: Bruce Edge Cc: xen-devel@lists.xensource.com List-Id: xen-devel@lists.xenproject.org On Wed, Oct 13, 2010 at 05:10:32PM -0700, Bruce Edge wrote: > On Fri, Jun 11, 2010 at 9:42 AM, Konrad Rzeszutek Wilk > wrote: > > On Fri, Jun 11, 2010 at 08:54:05AM -0700, Bruce Edge wrote: > >> On Fri, Jun 11, 2010 at 6:38 AM, Konrad Rzeszutek Wilk > >> wrote: > >> > On Fri, Jun 11, 2010 at 09:09:36AM +0300, Pasi K=E4rkk=E4inen wrot= e: > >> >> On Thu, Jun 10, 2010 at 04:25:54PM -0700, Bruce Edge wrote: > >> > >> >> > Here's the domU boot log: > >> > >> >> > =A0=A0 =A0 =A0 =A0memory =A0 =A0 =A0 =3D 4096 > >> > > >> > And also there is a bug where we can't do PCI in PV guests when gu= est > >> > has more than 3GB. > >> > > >> > >> Is there any expectation that this 3GB restriction will be resolved = in > >> the short term ? > > > > What is "short-term" ? This week =3D no. This month =3D likely. >=20 > It looks like this is still a restriction. Is there any plan to allow > pvops domU's to use more than 4GB ? Jeremy wrote up some new shinny code where the memory can be fragmented (so that we can now stick in a big PCI hole). His patches are in xen/balloon. But I haven't taken those and fiddled with them and changed the toolstack (xm or xl) to actually take advantage of this. >=20 > How much and who do we have to pay to get it in sooner? > If this ends up being our only show stopper for pvops, I'll start > selling lab equipment out the back door to pay for it. :-) Sheeshh. you are missing the mark. Instead of selling the lab equipment you _send_ the equipment - that is like a X-mas present for geeks: shiny new toy! :-) But jokes aside, I haven't touched this since this last email. And I am not going to get to it this week nor the next. Then there is one week where (25th->29th) where I can play with this. After that, Linux Kernel Summit and the Linux Plumbers Conference is in - so it will be quiet. If this is a show-stopper right now, you could come with a hack where the resource check is just ignored.