We are currently testing Xen3, and have installed the packages from debianbase.de on a Dell PowerEdge SC1425 running Debian Sarge. Installation went fine, and we have created guest domains (debootstrapped from the host) which seem to run with no errors, however the host domain is rebooting at random intervals and for no reason that I can identify. When it crashes there are no errors in the logs, and it restarts without a problem (although we have had some unclean shutdown problems with the guest domains). I thought it might be the custom kernel that I compiled, so I installed the precompiled kernel from debianbase.de, but the problem remains unchanged. This server had been running for several months without problem before I installed Xen, so I think a hardware problem is unlikely (unless it is now exercising a memory fault that was previously untouched). So can anyone give me some idea about how to start troubleshooting this problem? Environment: Hardware - Dell PowerEdge SC1425 (2.8GHz Xeon/1.5Gb RAM/2*80Gb SATA) Host OS - Debian Sarge (software RAID1/LVM2/ext3) Guest OS - Debian 3.1 (LVM2/ext3) Xen - 3.0.0 (debianbase.de) Kernel - 2.6.12.6-xen (debianbase.de) -- Jamie Neil | <jamie@versado.net> | 0870 7777 454 Versado I.T. Services Ltd. | http://versado.net/ | 0845 450 1254 _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
On 17 Jan 2006, at 1:43 pm, Mathias Diehl wrote:> Hi Jamie, > > actually I can''t help - except sharing your experiences. We faced > the situation on a rather old machine with XEN2 but didn''t find any > solution. > > We found some threads regarding USB issues - but as we have USB > disbaled that was no solution for us. With xen3 and new hardware > everything''s fine.... so far ;-)The same thing''s happening to me on my set up - my benchmark code code causes the domU to spontaneously reboot with no error messages anywhere. Very odd. The hardware here has no USB controller, so it''s not that. It''s got no graphics hardware either, so you can discount that. The domU sometimes reboots within a couple of seconds of starting the benchmark script (which in turn runs some bioinformatics applications) I''ll give Xen 3.0 a go to see if that fixes things for me too. Tim -- Dr Tim Cutts Informatics Systems Group, Wellcome Trust Sanger Institute GPG: 1024D/E3134233 FE3D 6C73 BBD6 726A A3F5 860B 3CDD 3F56 E313 4233 _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Mathias Diehl wrote:> actually I can''t help - except sharing your experiences. We faced the situation on a rather old machine with XEN2 but didn''t find any solution.We''ve not tried Xen2, we went straight for the latest version.> We found some threads regarding USB issues - but as we have USB disbaled that was no solution for us. With xen3 and new hardware everything''s fine.... so far ;-)I''ll have a look at the USB and see if it''s disabled. Thanks, -- Jamie Neil | <jamie@versado.net> | 0870 7777 454 Versado I.T. Services Ltd. | http://versado.net/ | 0845 450 1254 _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Tim Cutts wrote:> The same thing''s happening to me on my set up - my benchmark code code > causes the domU to spontaneously reboot with no error messages > anywhere. Very odd.Oddly enough, the guest domains seem to be ok on mine - it''s dom0 that''s crashing. -- Jamie Neil | <jamie@versado.net> | 0870 7777 454 Versado I.T. Services Ltd. | http://versado.net/ | 0845 450 1254 _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Hi Jamie, actually I can''t help - except sharing your experiences. We faced the situation on a rather old machine with XEN2 but didn''t find any solution. We found some threads regarding USB issues - but as we have USB disbaled that was no solution for us. With xen3 and new hardware everything''s fine.... so far ;-) cheers Mat -----Original Message----- Sent: Dienstag 17.01.06 09:46:00 Subject: [Xen-users] Unstable Xen host>We are currently testing Xen3, and have installed the packages from >debianbase.de on a Dell PowerEdge SC1425 running Debian Sarge. > >Installation went fine, and we have created guest domains >(debootstrapped from the host) which seem to run with no errors, however >the host domain is rebooting at random intervals and for no reason that >I can identify. > >When it crashes there are no errors in the logs, and it restarts without >a problem (although we have had some unclean shutdown problems with the >guest domains). I thought it might be the custom kernel that I compiled, >so I installed the precompiled kernel from debianbase.de, but the >problem remains unchanged. > >This server had been running for several months without problem before I >installed Xen, so I think a hardware problem is unlikely (unless it is >now exercising a memory fault that was previously untouched). > >So can anyone give me some idea about how to start troubleshooting this >problem? > >Environment: > Hardware - Dell PowerEdge SC1425 (2.8GHz Xeon/1.5Gb RAM/2*80Gb SATA) > Host OS - Debian Sarge (software RAID1/LVM2/ext3) > Guest OS - Debian 3.1 (LVM2/ext3) > Xen - 3.0.0 (debianbase.de) > Kernel - 2.6.12.6-xen (debianbase.de) > >-- >Jamie Neil | <jamie@versado.net> | 0870 7777 454 >Versado I.T. Services Ltd. | http://versado.net/ | 0845 450 1254 > >_______________________________________________ >Xen-users mailing list >Xen-users@lists.xensource.com >http://lists.xensource.com/xen-users_______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Jamie Neil wrote:> Mathias Diehl wrote: >> actually I can''t help - except sharing your experiences. We faced the >> situation on a rather old machine with XEN2 but didn''t find any solution. > > We''ve not tried Xen2, we went straight for the latest version. > >> We found some threads regarding USB issues - but as we have USB >> disbaled that was no solution for us. With xen3 and new hardware >> everything''s fine.... so far ;-) > > I''ll have a look at the USB and see if it''s disabled.Bingo! I added "nousb" option to the kernel: /boot/grub/menu.1st ------------------- title Xen 3.0.0 - Linux 2.6.12.6-xen root (hd0,0) kernel /boot/xen-3.0.gz module /boot/xen-linux-2.6.12.6-xen root=/dev/md0 ro nousb module /boot/xen-modules-2.6.12.6-xen savedefault boot Hasn''t crashed since (fingers crossed). Thanks, -- Jamie Neil | <jamie@versado.net> | 0870 7777 454 Versado I.T. Services Ltd. | http://versado.net/ | 0845 450 1254 _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
> I added "nousb" option to the kernel: > > /boot/grub/menu.1st > ------------------- > title Xen 3.0.0 - Linux 2.6.12.6-xen > root (hd0,0) > kernel /boot/xen-3.0.gz > module /boot/xen-linux-2.6.12.6-xen root=/dev/md0 ro nousb > module /boot/xen-modules-2.6.12.6-xen > savedefault > boot > > Hasn''t crashed since (fingers crossed).instead of ''nousb'', please could you try ''usb-handoff'' and report back to the list. Thanks, Ian _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Ian Pratt wrote:>> I added "nousb" option to the kernel: >> >> /boot/grub/menu.1st >> ------------------- >> title Xen 3.0.0 - Linux 2.6.12.6-xen >> root (hd0,0) >> kernel /boot/xen-3.0.gz >> module /boot/xen-linux-2.6.12.6-xen root=/dev/md0 ro nousb >> module /boot/xen-modules-2.6.12.6-xen >> savedefault >> boot >> >> Hasn''t crashed since (fingers crossed). > > instead of ''nousb'', please could you try ''usb-handoff'' and report back > to the list.Certainly - I''ll reset it this morning. -- Jamie Neil | <jamie@versado.net> | 0870 7777 454 Versado I.T. Services Ltd. | http://versado.net/ | 0845 450 1254 _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Jamie Neil wrote:> I added "nousb" option to the kernel: > > /boot/grub/menu.1st > ------------------- > title Xen 3.0.0 - Linux 2.6.12.6-xen > root (hd0,0) > kernel /boot/xen-3.0.gz > module /boot/xen-linux-2.6.12.6-xen root=/dev/md0 ro nousb > module /boot/xen-modules-2.6.12.6-xen > savedefault > boot > > Hasn''t crashed since (fingers crossed).Spoke too soon - reset itself again yesterday afternoon. No warning and nothing in the logs that seems to correspond. Think I''ll try some stress tests to see if I can make it crash on demand. -- Jamie Neil | <jamie@versado.net> | 0870 7777 454 Versado I.T. Services Ltd. | http://versado.net/ | 0845 450 1254 _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Ian Pratt wrote:> instead of ''nousb'', please could you try ''usb-handoff'' and report back > to the list.I''m still getting random reboots with both nousb and usb-handoff. Going to try disabling SMP in the kernel to see if that makes a difference. -- Jamie Neil | <jamie@versado.net> | 0870 7777 454 Versado I.T. Services Ltd. | http://versado.net/ | 0845 450 1254 _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Just thought I''d post an update to this problem in case anyone finds it useful. Problem went away after installing 3.0.1 (from packages.debianbase.de) and using the precompiled kernel for both host and guest OS''s. System now seems stable (no reboots for over two weeks with 5 guests running), and I have removed the "nousb" kernel option with no detrimental effect. So just for the record: Dell PowerEdge SC1425 (SATA) Debian 3.1 (Sarge) host Software RAID1 + LVM2 Xen 3.0.1 (from packages.debianbase.de) Kernel 2.6.12.6-xen (from packages.debianbase.de) seems to work just fine. -- Jamie Neil | <jamie@versado.net> | 0870 7777 454 Versado I.T. Services Ltd. | http://versado.net/ | 0845 450 1254 _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users