[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] Xen Hypervisor start fail when system memory more than 64GB, and free xen memory over 32 GB
On Mon, Aug 16, 2010 at 12:55:55PM +0300, Pasi Kärkkäinen wrote: > On Mon, Aug 16, 2010 at 05:46:24PM +0800, benian wrote: > > Hi Pasi > > I finally boot up successfully by simply modified the kernel config > > item CONFIG_XEN_MAX_DOMAIN_MEMORY=32 to CONFIG_XEN_MAX_DOMAIN_MEMORY=128 > > (just choose a random value >72 ), > > then rebuild the kernel-2.6.32 , and everything is ok. > > By the way, i 've done many test and i finally found that > > if unallocated memory(total - dom0 ) >32GB, boot up would be failed in my > > environment. > > for example, after I modified the kernel config, hypervisor boot normally > > and dom0 get 72GB. > > If i add dom0_mem= 32G(unallocated 40G) to grub option, hypervisor boot > > fail again, > > and if dom0_mem= 41G(unallocated 31G), hypervisor boot normally again. > > So , might it be a problem of xen-4.0 that unable to handle unallocated > > memory >32GB? > > > > Sounds like a bug yeah.. How does it fail in the dom0_mem=32G case? What's > the error? > > Can you please paste the full bootlog of the failing boot from a serial > console? > http://wiki.xensource.com/xenwiki/XenSerialConsole > Oh, one more thing, could you also try with Xen 4.0.1-rc6? Thanks! -- Pasi > > > > Regards, > > Ben > > 2010/8/12 Pasi Kärkkäinen <[1]pasik@xxxxxx> > > > > On Thu, Aug 12, 2010 at 03:08:25PM +0800, benian wrote: > > > > > > > > > My environment is xen-4.0.0 + pvops2.6.32 kernel + fedora12 > > > > > > I can run xen hypervisor smoothly when system memory below 64G > > > > > > But if I plug 4GB more memory to my server, XEN hypervisor start > > fail then > > > crash and restart automatically. > > > > > > The final screen is some message about memory address which will > > not be > > > displayed in normal process > > > > > > > > > > > > I read from XEN 4.0.0 features that Xen support 1 TB of RAM per > > host, so I > > > am not sure what *s wrong with this situation. > > > > > > > > > > > > Any idea is appreciated and welcome > > > > > > > > > > How much memory does your dom0 have? ie. what's your dom0_mem= option > > for xen.gz in grub.conf. > > Have you tried different values? ie. 2GB, 4GB, 8GB? > > > > Also setup a serial console so you can figure out if it's the Xen > > hypervisor or dom0 kernel crashing: > > [2]http://wiki.xensource.com/xenwiki/XenSerialConsole > > > > and more info about troubleshooting pvops dom0 kernels (also an example > > about serial console with pvops dom0): > > [3]http://wiki.xensource.com/xenwiki/XenParavirtOps > > > > Those should help. > > -- Pasi > > > > References > > > > Visible links > > 1. mailto:pasik@xxxxxx > > 2. http://wiki.xensource.com/xenwiki/XenSerialConsole > > 3. http://wiki.xensource.com/xenwiki/XenParavirtOps > > _______________________________________________ > Xen-devel mailing list > Xen-devel@xxxxxxxxxxxxxxxxxxx > http://lists.xensource.com/xen-devel _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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