This patch provides generic discontiguous memory support for the i386
numa architecture. The patch also provides supports for the ia32 IBM
NUMA-Q hardware platform. John Stultz also has added support for the
x440 hardware... which he'll post soon.
This patch depends on the three patches that I just sent out (modularization
of setup_arch(), modularization of mem_init(), and paddr -> pfn patches).
Assumptions made:
- that the first node has at least 900Mb of memory
Testing done:
- single proc desktop pc (CONFIG_X86_NUMAQ is not set)
- 4 proc SMP system (CONFIG_X86_NUMAQ is not set)
- 4 proc SMP system (CONFIG_X86_NUMAQ is not set, CONFIG_HIGHMEM=64GB)
- 16 proc NUMA box with 4GB memory (CONFIG_X86_NUMAQ=y,
CONFIG_NUMA is not set)
- 16 proc NUMA box with 4GB memory (CONFIG_X86_NUMAQ=y,
CONFIG_NUMA is not set, CONFIG_HIGHMEM=64GB)
- 16 proc NUMA box with 4GB memory (CONFIG_X86_NUMAQ=y,
CONFIG_NUMA=y)
- 16 proc NUMA box with 4GB memory (CONFIG_X86_NUMAQ=y,
CONFIG_NUMA=y, CONFIG_HIGHMEM=64GB)
- 8 proc NUMA box with 8GB memeory (CONFIG_X86_NUMAQ=y,
CONFIG_NUMA=y, CONFIG_HIGHMEM=64GB)
- 16 proc NUMA box with 16GB memory (CONFIG_X86_NUMAQ=y,
CONFIG_NUMA=y, CONFIG_HIGHMEM=64GB)
Any and all feedback regarding this patch is greatly appreciated.
Thanks,
Pat
--
Patricia Gaughen ([email protected])
IBM Linux Technology Center
http://www.ibm.com/linux/ltc/