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Subject[PATCH] (2/2) discontigmem support for i386 against 2.4.20pre4: discontigmem
Date

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. A version of this patch is in
the 2.4 aa tree.

This patch depends on the paddr->pfn patch that I just sent out.

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 (gone@us.ibm.com)
IBM Linux Technology Center
http://www.ibm.com/linux/ltc/

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