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Bob Picco e984bb43f7 [PATCH] Align the node_mem_map endpoints to a MAX_ORDER boundary ... Andy added code to buddy allocator which does not require the zone's endpoints to be aligned to MAX_ORDER. An issue is that the buddy allocator requires the node_mem_map's endpoints to be MAX_ORDER aligned. Otherwise __page_find_buddy could compute a buddy not in node_mem_map for partial MAX_ORDER regions at zone's endpoints. page_is_buddy will detect that these pages at endpoints are not PG_buddy (they were zeroed out by bootmem allocator and not part of zone). Of course the negative here is we could waste a little memory but the positive is eliminating all the old checks for zone boundary conditions. SPARSEMEM won't encounter this issue because of MAX_ORDER size constraint when SPARSEMEM is configured. ia64 VIRTUAL_MEM_MAP doesn't need the logic either because the holes and endpoints are handled differently. This leaves checking alloc_remap and other arches which privately allocate for node_mem_map. Signed-off-by: Bob Picco <bob.picco@hp.com> Acked-by: Mel Gorman <mel@csn.ul.ie> Cc: Dave Hansen <haveblue@us.ibm.com> Cc: Andy Whitcroft <apw@shadowen.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>		19 years ago
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acpi	…
asm-alpha	…
asm-arm	[PATCH] pxa2xx-spi update	19 years ago
asm-arm26	…
asm-cris	…
asm-frv	…
asm-generic	…
asm-h8300	…
asm-i386	[PATCH] x86_64: avoid IRQ0 ioapic pin collision	19 years ago
asm-ia64	[IA64] remove asm-ia64/bitops.h self-inclusion	19 years ago
asm-m32r	…
asm-m68k	…
asm-m68knommu	…
asm-mips	…
asm-parisc	…
asm-powerpc	…
asm-ppc	powerpc/32: Define an is_kernel_addr() to fix ARCH=ppc compilation	19 years ago
asm-s390	[PATCH] s390: add vmsplice system call	19 years ago
asm-sh	…
asm-sh64	…
asm-sparc	…
asm-sparc64	…
asm-um	…
asm-v850	…
asm-x86_64	[PATCH] x86_64: Avoid EBDA area in early boot allocator	19 years ago
asm-xtensa	…
keys	…
linux	[PATCH] Align the node_mem_map endpoints to a MAX_ORDER boundary	19 years ago
math-emu	…
media	…
mtd	…
net	[SCTP]: Respect the real chunk length when walking parameters.	19 years ago
pcmcia	…
rdma	…
rxrpc	…
scsi	…
sound	…
video	…