Hi listmembers, last night at the data-center I encountered two weird problems with two of our Xen Servers. Hardware is Supermicro PDSMi and PDSMe. We tried to change RAM from 4GB (4*1/667) to 8GB (4*2/667). One Board only shows a black screen, but this seems to be a BIOS issue (rev1.1). The other one was booting xen3.1 PAE, but when it reached the the dom0 Kernel, it freezed. Adding a grub menu entry with dom0_mem=512M shows "Scrubbing Ram ........." and freezes. The dom0 Kernel which is supposed to boot is also i386 PAE. Xen shows a support Value of 16GB Ram. Is there any known issue on booting PAE w/ 8GB Ram? Oh besides, we recently tried the new Ram in another (unrelated) machine, and did memtest86 with no errors. My Question is now, should I look for Xen errors or report this error to the vendor? Another, non memory related problem, was on a machine with pciback.hide in the dom0 and pci= in one domU config, to give one ISDN Card directly to one domU. This works really nice, also the ISDN Card is running fine. But, when i shutdown this particular domU, after unloading the kernelcapi, a Kernelpanic occurs, which randomly freezes the whole machine. Since I''m using xm console, I was not able to see, if this kernelpanic was reported from domU during shutdown or directly from dom0 with loss of domU console connection. Is there any known problem on freeing domU pci devices? I tried this with xen3.1 PAE and xen distributed 3.1 kernel as well as with Ubuntu xen-2.6.18-server (which is also PAE, but derived from 3.03 Xen). domU kernel was always xen distributed 3.1. PCI Device is a ISDN PCI Fritz! Card from AVM, drivers were compiled with the particular kernelheaders from recent AVM Sources. I compiled them directly in the running domU, the modules and kernelheaders has been copied from dom0. Thanks in advance! ...did I mention how boring a data center can be between 22:00 and 05:00 ? brrrr -- Stephan Seitz Senior System Administrator *netz-haut* e.K. multimediale kommunikation zweierweg 22 97074 würzburg fon: +49 931 2876247 fax: +49 931 2876248 web: www.netz-haut.de <http://www.netz-haut.de/> registriergericht: amtsgericht würzburg, hra 5054 _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Stephan Seitz
2007-Jul-05 07:34 UTC
Re: [Xen-users] Weird Problems w/ RAM and pciback.hide
Stephan Seitz schrieb:> Hi listmembers,Problems are solved.> last night at the data-center I encountered two weird problems with two of our Xen Servers. > Hardware is Supermicro PDSMi and PDSMe. We tried to change RAM from 4GB (4*1/667) to 8GB > (4*2/667). One Board only shows a black screen, but this seems to be a BIOS issue (rev1.1). > The other one was booting xen3.1 PAE, but when it reached the the dom0 Kernel, it freezed. > Adding a grub menu entry with dom0_mem=512M shows "Scrubbing Ram ........." and freezes. > The dom0 Kernel which is supposed to boot is also i386 PAE. Xen shows a support Value of > 16GB Ram. Is there any known issue on booting PAE w/ 8GB Ram? > Oh besides, we recently tried the new Ram in another (unrelated) machine, and did memtest86 > with no errors.That problem was related to the BIOS versions on the SuperMicro PDSMi and PDSME (1.2a works on both).> My Question is now, should I look for Xen errors or report this error to the vendor? > > Another, non memory related problem, was on a machine with pciback.hide in the dom0 > and pci= in one domU config, to give one ISDN Card directly to one domU. This works > really nice, also the ISDN Card is running fine. But, when i shutdown this particular > domU, after unloading the kernelcapi, a Kernelpanic occurs, which randomly freezes the > whole machine. Since I''m using xm console, I was not able to see, if this kernelpanic > was reported from domU during shutdown or directly from dom0 with loss of domU console > connection. > Is there any known problem on freeing domU pci devices? > I tried this with xen3.1 PAE and xen distributed 3.1 kernel as well as with Ubuntu > xen-2.6.18-server (which is also PAE, but derived from 3.03 Xen). > domU kernel was always xen distributed 3.1. PCI Device is a ISDN PCI Fritz! Card from > AVM, drivers were compiled with the particular kernelheaders from recent AVM Sources. > I compiled them directly in the running domU, the modules and kernelheaders has been > copied from dom0.A newer kernel provided the information to try "pci=poll" before it freezed. Changing the grub entry to ''pci=poll pciback.hide=(03:03.1)'' solved this issue. -- Stephan Seitz Senior System Administrator *netz-haut* e.K. multimediale kommunikation zweierweg 22 97074 würzburg fon: +49 931 2876247 fax: +49 931 2876248 web: www.netz-haut.de <http://www.netz-haut.de/> registriergericht: amtsgericht würzburg, hra 5054 _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users