diff options
| author | David Rientjes <rientjes@google.com> | 2010-02-15 13:43:25 -0800 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2010-02-15 14:34:04 -0800 |
| commit | 68fd111e02b979876359c7b471a8bcbca0628b75 (patch) | |
| tree | 6b8cd2a098fd5bbe6ced2a7c313c52ae3bf48d59 | |
| parent | 0271f91003d3703675be13b8865618359a6caa1f (diff) | |
| download | op-kernel-dev-68fd111e02b979876359c7b471a8bcbca0628b75.zip op-kernel-dev-68fd111e02b979876359c7b471a8bcbca0628b75.tar.gz | |
x86, numa: Fix numa emulation calculation of big nodes
numa=fake=N uses split_nodes_interleave() to partition the system into N
fake nodes. Each node size must have be a multiple of
FAKE_NODE_MIN_SIZE, otherwise it is possible to get strange alignments.
Because of this, the remaining memory from each node when rounded to
FAKE_NODE_MIN_SIZE is consolidated into a number of "big nodes" that are
bigger than the rest.
The calculation of the number of big nodes is incorrect since it is using
a logical AND operator when it should be multiplying the rounded-off
portion of each node with N.
Signed-off-by: David Rientjes <rientjes@google.com>
LKML-Reference: <alpine.DEB.2.00.1002151342230.26927@chino.kir.corp.google.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
| -rw-r--r-- | arch/x86/mm/numa_64.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/mm/numa_64.c b/arch/x86/mm/numa_64.c index 83bbc70..2ecbe0c 100644 --- a/arch/x86/mm/numa_64.c +++ b/arch/x86/mm/numa_64.c @@ -427,7 +427,7 @@ static int __init split_nodes_interleave(u64 addr, u64 max_addr, * Calculate the number of big nodes that can be allocated as a result * of consolidating the remainder. */ - big = ((size & ~FAKE_NODE_MIN_HASH_MASK) & nr_nodes) / + big = ((size & ~FAKE_NODE_MIN_HASH_MASK) * nr_nodes) / FAKE_NODE_MIN_SIZE; size &= FAKE_NODE_MIN_HASH_MASK; |
