From mboxrd@z Thu Jan 1 00:00:00 1970 From: Kip Macy Subject: Re: Unstableness in grant table block drivers Date: Wed, 13 Apr 2005 19:17:47 -0700 Message-ID: References: <425DCAC4.6030407@us.ibm.com> Reply-To: Kip Macy Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Return-path: In-Reply-To: Content-Disposition: inline List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: cwc22@cam.ac.uk Cc: xen-devel@lists.xensource.com List-Id: xen-devel@lists.xenproject.org So domUs have to have grant table support enabled if dom0 does? -Kip On 4/13/05, Christopher Clark wrote: > Hello Anthony >=20 > First off, hands up: this was my code and I just didn't get around to > sending the mail to the list as I had enough to deal with relocating > from the UK to the US last week. The code was, however, tested under > load and working fine, and I did consider it to be ready for wider > testing in unstable. >=20 > The machines you can't get to start domUs, and symptom of not finding > the root filesystem is exactly what you'd see if your dom0 and domU > configs don't match; either both or neither need to be using grant > tables for transport. Your other issues will need more investigation, > and a reproducable scenario would be extremely helpful indeed. >=20 > Regards, >=20 > Christopher >=20 >=20 > On 4/13/05, Anthony Liguori wrote: > > Ian Pratt wrote: > > > > >OK, that's news to us - we haven't seen any problems. > > > > > >It's been tested with dd's and kernel builds, and wasn't expected to b= e > > >a particularly dangerous change. > > > > > >How you confirmed that disabling the option fixes your problems? Can y= ou > > >give a simple recipe to provoke problems? > > > > > We've had three different systems lose the ability to start domUs. > > Disabling VBD grant tables fixed the problem. The best reproducable > > example we have is default config on a domU from today's xen-unstable > > snapshot. /dev/console is not accessible and no valid root is found. > > > > In my own case, it was working fairly well and then it just stopped > > working. It would die mid-way through boot. Again, disabling VBD > > grant-tables fixed the problem. I'm going to look into the problem thi= s > > evening and see if I can get you guys a more reproducable scenario. > > > > >It doesn't seem to be destablizing, at least for us. Possibly there's > > >been some feature interaction with later checkins. > > > > > > > > Possibly. > > > > >Anyone using the unstable tree should be reading the changelog > > >closely... > > > > > > > > I agree. I do, but I don't think a lot of people do. I'm not trying t= o > > give you guys more work to do :-) Just a quick note to xen-devel would > > suffice (if you've got an extra second). > > > > Thanks Ian, > > > > Regards, > > Anthony Liguori > > > > >Ian > > > > > > > > > > > > > _______________________________________________ > > Xen-devel mailing list > > Xen-devel@lists.xensource.com > > http://lists.xensource.com/xen-devel > > >=20 > _______________________________________________ > Xen-devel mailing list > Xen-devel@lists.xensource.com > http://lists.xensource.com/xen-devel >