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authorMike Kravetz <kravetz@us.ibm.com>2005-08-02 04:11:48 (GMT)
committerLinus Torvalds <torvalds@g5.osdl.org>2005-08-02 04:38:01 (GMT)
commit96cd5b0856a25e2ec366702e1923070ffca53dae (patch)
treec3526247f01c34574db43243b87a8b8bf61125c7
parent842bbaaa7394820c8f1fe0629cd15478653caf86 (diff)
[PATCH] ppc64: POWER 4 fails to boot with NUMA
If CONFIG_NUMA is set, some POWER 4 systems will fail to boot. This is because of special processing needed to handle invalid node IDs (0xffff) on POWER 4. My previous patch to handle memory 'holes' within nodes forgot to add this special case for POWER 4 in one place. In reality, I'm not sure that configuring the kernel for NUMA on POWER 4 makes much sense. Are there POWER 4 based systems with NUMA characteristics that are presented by the firmware? But, distros want one kernel for all systems so NUMA is on by default in their kernels. The patch handles those cases. Signed-off-by: Mike Kravetz <kravetz@us.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--arch/ppc64/mm/numa.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/arch/ppc64/mm/numa.c b/arch/ppc64/mm/numa.c
index cafd91a..0b191f2 100644
--- a/arch/ppc64/mm/numa.c
+++ b/arch/ppc64/mm/numa.c
@@ -647,7 +647,12 @@ void __init do_init_bootmem(void)
new_range:
mem_start = read_n_cells(addr_cells, &memcell_buf);
mem_size = read_n_cells(size_cells, &memcell_buf);
- numa_domain = numa_enabled ? of_node_numa_domain(memory) : 0;
+ if (numa_enabled) {
+ numa_domain = of_node_numa_domain(memory);
+ if (numa_domain >= MAX_NUMNODES)
+ numa_domain = 0;
+ } else
+ numa_domain = 0;
if (numa_domain != nid)
continue;

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