| To: | Xen-devel@xxxxxxxxxxxxxxxxxxx |
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| Subject: | [Xen-devel] Problem with nr_nodes on large memory NUMA machine |
| From: | beth kon <eak@xxxxxxxxxx> |
| Date: | 2007年10月19日 11:02:05 -0400 |
| Delivery-date: | 2007年10月19日 08:03:24 -0700 |
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| Organization: | IBM |
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#ifdef __x86_64__ clip_to_limit((uint64_t)(MACH2PHYS_COMPAT_VIRT_END - __HYPERVISOR_COMPAT_VIRT_START) << 10, "Only the first %u GB of the physical memory map " "can be accessed by 32-on-64 guests."); #endif Boot messages....(XEN) WARNING: Only the first 166 GB of the physical memory map can be accessed by 32-on-64 guests. (XEN) Truncating memory map to 174063616kB After the memory is clipped, acpi_scan_nodes runs cutoff_node, which limits the memory associated with each node according to the cutoff values. Then, acpi_scan_nodes calls unparse_node to "remove" nodes that don't have the minimum amount of memory, due to the clipping of the memory range.
Can someone explain what this is all about and why it might be necessary? -- Elizabeth Kon (Beth) IBM Linux Technology Center Open Hypervisor Team email: eak@xxxxxxxxxx _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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