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linux/arch/x86_64/mm
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Eric Dumazet 529a340402 [PATCH] x86_64: Optimize NUMA node hash function 
Compute the highest possible value for memnode_shift, in order to reduce
footprint of memnodemap[] to the minimum, thus making all users
(phys_to_nid(), kfree()), more cache friendly.

Before the patch :

 Node 0 MemBase 0000000000000000 Limit 00000001ffffffff
 Node 1 MemBase 0000000200000000 Limit 00000003ffffffff
 Using 23 for the hash shift. Max adder is 3ffffffff

After the patch :

 Node 0 MemBase 0000000000000000 Limit 00000001ffffffff
 Node 1 MemBase 0000000200000000 Limit 00000003ffffffff
 Using 33 for the hash shift.

In this case, only 2 bytes of memnodemap[] are used, instead of 2048

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-14 19:55:15 -08:00
..
extable.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
fault.c [PATCH] x86-64: Safe interrupts in oops_begin/end 2005-09-12 10:50:57 -07:00
init.c [PATCH] x86_64: Replace swiotlb extern with include 2005-11-14 19:55:15 -08:00
ioremap.c [PATCH] mm: init_mm without ptlock 2005-10-29 21:40:40 -07:00
k8topology.c [PATCH] x86-64: Support dualcore and 8 socket systems in k8 fallback node parsing 2005-09-12 10:49:56 -07:00
Makefile [PATCH] reorganize x86-64 NUMA and DISCONTIGMEM config options 2005-06-23 09:45:06 -07:00
numa.c [PATCH] x86_64: Optimize NUMA node hash function 2005-11-14 19:55:15 -08:00
pageattr.c [PATCH] x86_64: Fix change_page_attr cache flushing 2005-10-10 16:10:33 -07:00
srat.c [PATCH] x86_64: Speed up numa_node_id by putting it directly into the PDA 2005-11-14 19:55:14 -08:00