]> pilppa.com Git - linux-2.6-omap-h63xx.git/commit
[PATCH] x86-64: Fix fake numa for x86_64 machines with big IO hole
authorRohit Seth <rohitseth@google.com>
Tue, 13 Feb 2007 12:26:22 +0000 (13:26 +0100)
committerAndi Kleen <andi@basil.nowhere.org>
Tue, 13 Feb 2007 12:26:22 +0000 (13:26 +0100)
commit53fee04f318222a3179ca5933d8bda82c1eef17a
tree989d1c95b07d22473e596561216637711b4cd819
parent3b3d5e1db66cd66148b2cebd2c38aff2a8df03d6
[PATCH] x86-64: Fix fake numa for x86_64 machines with big IO hole

This patch resolves the issue of running with numa=fake=X on kernel command
line on x86_64 machines that have big IO hole.  While calculating the size
of each node now we look at the total hole size in that range.

Previously there were nodes that only had IO holes in them causing kernel
boot problems.  We now use the NODE_MIN_SIZE (64MB) as the minimum size of
memory that any node must have.  We reduce the number of allocated nodes if
the number of nodes specified on kernel command line results in any node
getting memory smaller than NODE_MIN_SIZE.

This change allows the extra memory to be incremented in NODE_MIN_SIZE
granule and uniformly distribute among as many nodes (called big nodes) as
possible.

[akpm@osdl.org: build fix]
Signed-off-by: David Rientjes <reintjes@google.com>
Signed-off-by: Paul Menage <menage@google.com>
Signed-off-by: Rohit Seth <rohitseth@google.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
arch/x86_64/kernel/e820.c
arch/x86_64/mm/numa.c
include/asm-x86_64/e820.h
include/asm-x86_64/mmzone.h