On Tue, 2007-07-03 at 15:23 +0100, Daniel P. Berrange wrote: > Let me guest - you are running a 32-bit kernel on the machine ? If so > the problem is likely that the BOIS is remapping a portion of memory > above the 4 GB mark, to make room for PCI device DMA zones. A 32-bit > kernel though can only access physical addrs upto 4 GB, so it can't > see the remapped memory. I'm aware of that, but in my case it doesn't make sense: the server only has 3 GB of RAM. The kernel just doesn't see all of it. I was using kernel-xen-2.6.19-1.2895.fc6 and about 512 MB were missing. After upgrading to kernel-xen-2.6.20-1.2962.fc6, the kernel can see more memory, but I'm still missing about 256 MB. I'm going to open a new bug report for this. > PCI device mapping to DomUs is insanely fragile, whether it works or not > is mostly luck. In this case since you added more memory, the locaiton of > the PCI device's DMA zone probably changed and by (bad) luck is no longer > accessible to the DomU or something like that. That's what I figured, though I don't know all of the details. However, with the new kernel being able to see more of the 3 GB, the domU is working again. The pci device I'm hiding from dom0 is being properly handed to the domU. Regards, Ranbir -- Kanwar Ranbir Sandhu Linux 2.6.20-1.2944.fc6 i686 GNU/Linux 10:42:35 up 20:50, 2 users, load average: 2.15, 2.16, 1.45 -- Fedora-xen mailing list Fedora-xen@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/fedora-xen
