Hi all, I was using xen 3.4.0 ,32bit dom0 to do some test on a 1TB memory system.When tring to boot a 256GB PV guest(both EL4 and EL5),it just hang after the domain builder completed it work. Is it tested for 256GB PV guest? Anyone ever do this successfully? And any suggestions? Thanks, xiaowei _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
32-bits Xen only support 16GB memory at most. I think to support 256GB memory, you have to use a 64-bits Xen at least. Fix me if I'm wrong. -Shunli -----Original Message----- From: xen-devel-bounces@lists.xensource.com [mailto:xen-devel-bounces@lists.xensource.com] On Behalf Of xiaowei hu Sent: 2010年7月9日 16:45 To: xen-devel Cc: xiaowei.hu@oracle.com Subject: [Xen-devel] Hang when starting a 256GB PV guest. Hi all, I was using xen 3.4.0 ,32bit dom0 to do some test on a 1TB memory system.When tring to boot a 256GB PV guest(both EL4 and EL5),it just hang after the domain builder completed it work. Is it tested for 256GB PV guest? Anyone ever do this successfully? And any suggestions? Thanks, xiaowei _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel To report this as spam, please forward to spam@websense.com. Thank you. Protected by Websense Hosted Email Security -- www.websense.com _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
>>> On 09.07.10 at 10:44, xiaowei hu <xiaowei.hu@oracle.com> wrote: > I was using xen 3.4.0 ,32bit dom0 to do some test on a 1TB memory > system.When tring to boot a 256GB PV guest(both EL4 and EL5),it just > hang after the domain builder completed it work. > > Is it tested for 256GB PV guest? Anyone ever do this successfully? And > any suggestions?Doing this with a 32-bit Dom0 seems odd at best, but it should (theoretically) work. Do you see the same with a 64-bit Dom0? Did you analyze where the guests hang (i.e. whether their kernel has an issue with that amount of memory)? Jan _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
On Fri, 2010-07-09 at 09:55 +0100, Jan Beulich wrote:> >>> On 09.07.10 at 10:44, xiaowei hu <xiaowei.hu@oracle.com> wrote: > > I was using xen 3.4.0 ,32bit dom0 to do some test on a 1TB memory > > system.When tring to boot a 256GB PV guest(both EL4 and EL5),it just > > hang after the domain builder completed it work. > > > > Is it tested for 256GB PV guest? Anyone ever do this successfully? And > > any suggestions? > > Doing this with a 32-bit Dom0 seems odd at best, but it should > (theoretically) work. Do you see the same with a 64-bit Dom0? > Did you analyze where the guests hang (i.e. whether their kernel > has an issue with that amount of memory)?yes,64-bit Dom0 also has this problem. Even the pygrub menu did not show up,it hang there.> > Jan > > > _______________________________________________ > Xen-devel mailing list > Xen-devel@lists.xensource.com > http://lists.xensource.com/xen-devel_______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
>>> On 09.07.10 at 11:04, xiaowei hu <xiaowei.hu@oracle.com> wrote: > On Fri, 2010-07-09 at 09:55 +0100, Jan Beulich wrote: >> >>> On 09.07.10 at 10:44, xiaowei hu <xiaowei.hu@oracle.com> wrote: >> > I was using xen 3.4.0 ,32bit dom0 to do some test on a 1TB memory >> > system.When tring to boot a 256GB PV guest(both EL4 and EL5),it just >> > hang after the domain builder completed it work. >> > >> > Is it tested for 256GB PV guest? Anyone ever do this successfully? And >> > any suggestions? >> >> Doing this with a 32-bit Dom0 seems odd at best, but it should >> (theoretically) work. Do you see the same with a 64-bit Dom0? >> Did you analyze where the guests hang (i.e. whether their kernel >> has an issue with that amount of memory)? > yes,64-bit Dom0 also has this problem. > Even the pygrub menu did not show up,it hang there.So you say the kernel doesn''t even get control? Iirc someone else at Oracle got this to work quite a while ago - you may want to search the xen-devel archives... Jan _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel