Hello, Currently, page_alloc internal functions walk early_node_map[] directly while external users can walk it with callback based work_with_active_regions(). Callback based walking is awkward to use and iterating early_node_map[] directly hinders scheduled move of node information to memblock. This patchset implements for_each_mem_pfn_range() which is easier for and used by both internal and external users, and provides indirection layer so that node memory information can be moved elsewhere. This patchset is composed of two parts. The first half implements the new iterator and converts all internal and external users other than the ones which directly manipulate early_node_map[]. The second half uses the new iterator to improve memblock_nid_range(), implement proper top-down memblock allocation and replaces x86 specific memblock allocator with it. Most of the changes are in mm/page_alloc,memblock.c and under x86 but there are small updates to sparc and powerpc. They shouldn't change any behavior but I've only compile tested them. 0001-bootmem-Replace-work_with_active_regions-with-for_ea.patch 0002-bootmem-Reimplement-__absent_pages_in_range-using-fo.patch 0003-bootmem-Use-for_each_mem_pfn_range-in-page_alloc.c.patch 0004-memblock-Improve-generic-memblock_nid_range-using-fo.patch 0005-memblock-Don-t-allow-archs-to-override-memblock_nid_.patch 0006-memblock-Make-memblock_alloc_-try_-nid-top-down.patch 0007-memblock-Separate-out-memblock_find_in_range_node.patch 0008-memblock-x86-Replace-memblock_x86_find_in_range_node.patch 0001 implements for_each_mem_pfn_range() and replaces work_with_active_regions() with it. 0002-0003 apply for_each_mem_pfn_range() in page_alloc.c. 0004-0008 implement proper top-down allocation for memblock and replace x86 specific memblock allocator with it. This patchset is on top of x86/urgent (5da0ef9a85 "x86: Disable AMD_NUMA for 32bit for now") + pfn->nid granularity check patches [1] + "memblock, x86: Misc cleanups" patchset [2] and available in the following git branch. git://git.kernel.org/pub/scm/linux/kernel/git/tj/misc.git review-x86-mm-iter This patchset simplifies early_node_map[] walking and removes duplicate x86 specific implementation and removes just shy of 200 lines. arch/powerpc/mm/numa.c | 50 +----- arch/sparc/mm/init_64.c | 4 arch/x86/include/asm/memblock.h | 1 arch/x86/mm/memblock.c | 38 ---- arch/x86/mm/numa.c | 9 - drivers/pci/intel-iommu.c | 24 +- include/linux/memblock.h | 5 include/linux/mm.h | 24 ++ mm/memblock.c | 90 ++++------- mm/nobootmem.c | 3 mm/page_alloc.c | 326 +++++++++++----------------------------- 11 files changed, 190 insertions(+), 384 deletions(-) Thanks. -- tejun [1] http://thread.gmane.org/gmane.linux.kernel/1166521 [2] http://thread.gmane.org/gmane.linux.kernel.cross-arch/10338 -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
