Ryan Harper
2005-Dec-16 23:03 UTC
[Xen-devel] [PATCH] 1/7 xen: Add basic NUMA support - Infrastructure
The attached tarball contains a script that will generate a patch that integrates NUMA support from Linux into Xen. The integration support borrows heavily from linux/arch/i386/srat.c for ACPI SRAT table parsing rather than using the more heavyweight ACPI_NUMA. The SRAT table code has been tested on x86_32 and x86_64 and works with both 32-bit and 64-bit systems. The code parses the SRAT table for memory and processor affinity and creates the proper node to cpu mapping. We define a new memory structure, node_memory_chunk_s, which is based on the same structure in linux, but tweaked for Xen. This structure is used to keep track of the discontiguous chunks of memory in the system and the node to which they belong. We bring in Linux macros and methods for node function like cpu_to_node, num_online_nodes, node_to_cpumask, etc. NUMA support in Xen is a compile-time option via the build system. Passing numa=y will enable all of the NUMA functionality. We have tested the code with numa=y and numa=n. To create the first numa patch, unpack the attached tarball, numa.tgz, and invoke numa.sh. -- Ryan Harper Software Engineer; Linux Technology Center IBM Corp., Austin, Tx (512) 838-9253 T/L: 678-9253 ryanh@us.ibm.com _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel