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Date: Tue, 12 Jul 2011 11:15:53 +0200 From: Tejun Heo <tj@...nel.org> To: mingo@...hat.com, hpa@...or.com, tglx@...utronix.de, benh@...nel.crashing.org, yinghai@...nel.org, davem@...emloft.net Cc: linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org, x86@...nel.org Subject: [PATCHSET x86/mm] memblock, x86: Allow node info in memblock and remove x86 specific memblock code Hello, There are multiple ways to represent memory configuration during boot. Even with the latest incarnation - nobootmem, the configuration isn't centralized or easy to use. NUMA information lives in early_node_map[] while memory config and alloc/reservation live in memblock. This leads to ugly code pieces which try to combine the two separate information sources both in generic and arch specfic parts. This patchset extends memblock such that it can also host node information and allows an arch to do away with early_node_map[] and use memblock as the sole early memory config / allocation mechanism. For short term, this adds yet another config option - HAVE_MEMBLOCK_NODE_MAP in this area. Longer term goal is removing early_node_map[] completely and convert everyone over to memblock. As early_node_map[] usage is limited only to NUMA archs, this should be easiser than bootmem allocator conversion. In the end, memblock will be the only early mem mechanism. Note that this patchset still leaves good amount of code which can be removed / cleaned up in not too distant future. For example, memblock non-NUMA alloc code can simply be degenerate case of NUMA aware alloc, which can also be implemented in simpler and more efficient way with reverse free area iterator. This patchset first extends memblock so that it can contain node information and then replaces x86 specific memblock code with the generic one. 0001-memblock-Remove-memblock_memory_can_coalesce.patch 0002-memblock-Reimplement-memblock_add_region.patch 0003-memblock-Add-optional-region-nid.patch 0004-x86-Use-HAVE_MEMBLOCK_NODE_MAP.patch 0005-x86-Use-__memblock_alloc_base-in-early_reserve_e820.patch 0006-memblock-Implement-for_each_free_mem_range.patch 0007-x86-Replace-memblock_x86_find_in_range_size-with-for.patch 0008-memblock-x86-Make-free_all_memory_core_early-explici.patch 0009-memblock-x86-Replace-__get_free_all_memory_range-wit.patch 0010-memblock-x86-Reimplement-memblock_find_dma_reserve-u.patch 0011-x86-Use-absent_pages_in_range-instead-of-memblock_x8.patch 0012-memblock-x86-Make-ARCH_DISCARD_MEMBLOCK-a-config-opt.patch 0013-memblock-x86-Replace-memblock_x86_reserve-free_range.patch 0001-0004 implement HAVE_MEMBLOCK_NODE_MAP and use it in x86. 0005-0013 adds generic memblock free area iterator and gradually replaces x86 specific memblock mechanism with generic one. 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] + "memblock, x86: Implement for_each_mem_pfn_range() and use it to improve memblock allocator" patchset [3] and available in the following git branch. git://git.kernel.org/pub/scm/linux/kernel/git/tj/misc.git review-x86-mm-memblock Diffstat follows. arch/x86/Kconfig | 2 arch/x86/include/asm/e820.h | 2 arch/x86/include/asm/memblock.h | 22 -- arch/x86/kernel/aperture_64.c | 2 arch/x86/kernel/check.c | 34 +-- arch/x86/kernel/e820.c | 55 ++--- arch/x86/kernel/head.c | 2 arch/x86/kernel/head32.c | 5 arch/x86/kernel/head64.c | 5 arch/x86/kernel/mpparse.c | 12 - arch/x86/kernel/setup.c | 17 - arch/x86/kernel/trampoline.c | 2 arch/x86/mm/Makefile | 2 arch/x86/mm/init.c | 6 arch/x86/mm/init_32.c | 28 +- arch/x86/mm/memblock.c | 318 ---------------------------- arch/x86/mm/memtest.c | 33 +-- arch/x86/mm/numa.c | 24 +- arch/x86/mm/numa_32.c | 6 arch/x86/mm/numa_64.c | 2 arch/x86/mm/numa_emulation.c | 34 +-- arch/x86/platform/efi/efi.c | 6 arch/x86/xen/mmu.c | 12 - arch/x86/xen/setup.c | 7 include/linux/bootmem.h | 2 include/linux/memblock.h | 54 ++++ include/linux/mm.h | 2 mm/Kconfig | 6 mm/memblock.c | 440 ++++++++++++++++++++++++++++------------ mm/nobootmem.c | 40 ++- mm/page_alloc.c | 47 ++-- 31 files changed, 554 insertions(+), 675 deletions(-) Thanks. -- tejun [1] http://thread.gmane.org/gmane.linux.kernel/1166521 [2] http://thread.gmane.org/gmane.linux.kernel.cross-arch/10338 [3] http://thread.gmane.org/gmane.linux.kernel.cross-arch/10345 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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