I have xen on a machine with 16G of Ram and 2 quad core AMD cpus. I have allocated about 10G of memory between 4 domUs, giving each a single vcpu that is not pinned. I went to create a 5th domU today and once created the domU does not run. Shutting off the 4th domU and then starting the 5th allows the 5th to run, but then trying to start the 4th it never runs (cpu time never increases). I am using LVM backed xvds and each domain has 2 xvds, one for / and one for swap. All of the domUs are pv. xm info sees all of my sockets, cores, and memory. When trying to run the 5th domain it allocates the memory as expected. xend.log looks identical between booting a domU that executes and a domU that does not. The only thing that I can think might be related is the 4 cores/ socket and this is starting my 5th domU. But since there is a vcpu for dom0 it kinda shoots a hole in that theory because starting the 5th domU creates the 6th vcpu. I have no ideas looking for help. Thanks _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
On Wed, Oct 01, 2008 at 02:50:01PM -0500, Nick Anderson wrote:> I have xen on a machine with 16G of Ram and 2 quad core AMD cpus. > I have allocated about 10G of memory between 4 domUs, giving each a > single vcpu that is not pinned. I went to create a 5th domU today and > once created the domU does not run. Shutting off the 4th domU and then > starting the 5th allows the 5th to run, but then trying to start the > 4th it never runs (cpu time never increases).Maybe MAX_LOOP has been reached? Rainer _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
On Wed, Oct 01, 2008 at 10:00:08PM +0200, Rainer Sokoll wrote:> Maybe MAX_LOOP has been reached?Resending to list ---- Does that not apply only for image backed domUs? I am using LVM and I have 8 loop devices ({/dev/loop{0,1,2,3,4,5,6,7}). _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
On Wed, Oct 01, 2008 at 03:17:58PM -0500, Nick Anderson wrote:> Resending to list ---- > Does that not apply only for image backed domUs? I am using LVM and I > have 8 loop devices ({/dev/loop{0,1,2,3,4,5,6,7}).Apparently you are correct, thank you kindly sir. I increased my max_loop rebooted and it seems to work now. I was not aware that the loop devices were used when using LVM _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Can someone explain why loop devices are used when using LVM backed ? regds Bruno Bertechini Gerente de Projetos Acensco Tecnologia +55 41 9255-2204 +55 41 3025-3316 -----Mensagem original----- De: xen-users-bounces@lists.xensource.com [mailto:xen-users-bounces@lists.xensource.com] Em nome de Nick Anderson Enviada em: quarta-feira, 1 de outubro de 2008 17:33 Para: xen-users@lists.xensource.com Assunto: Re: [Xen-users] 5th domU wont run On Wed, Oct 01, 2008 at 03:17:58PM -0500, Nick Anderson wrote:> Resending to list ---- > Does that not apply only for image backed domUs? I am using LVM and I > have 8 loop devices ({/dev/loop{0,1,2,3,4,5,6,7}).Apparently you are correct, thank you kindly sir. I increased my max_loop rebooted and it seems to work now. I was not aware that the loop devices were used when using LVM _______________________________________________ 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
are you using tap:aio ? where are your domU config ? -------------------- Itamar Reis Peixoto e-mail/msn: itamar@ispbrasil.com.br sip: itamar@ispbrasil.com.br skype: itamarjp icq: 81053601 +55 11 4063 5033 +55 34 3221 8599 On 10/16/2008 10:59 PM, Bruno Bertechini wrote:> Can someone explain why loop devices are used when using LVM backed ? > > regds > > Bruno Bertechini > > Gerente de Projetos > > Acensco Tecnologia > > +55 41 9255-2204 > > +55 41 3025-3316 > > -----Mensagem original----- > De: xen-users-bounces@lists.xensource.com > [mailto:xen-users-bounces@lists.xensource.com] Em nome de Nick Anderson > Enviada em: quarta-feira, 1 de outubro de 2008 17:33 > Para: xen-users@lists.xensource.com > Assunto: Re: [Xen-users] 5th domU wont run > > On Wed, Oct 01, 2008 at 03:17:58PM -0500, Nick Anderson wrote: > >> Resending to list ---- >> Does that not apply only for image backed domUs? I am using LVM and I >> have 8 loop devices ({/dev/loop{0,1,2,3,4,5,6,7}). >> > Apparently you are correct, thank you kindly sir. I increased my > max_loop rebooted and it seems to work now. > > I was not aware that the loop devices were used when using LVM > > _______________________________________________ > 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 > > >_______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users