Commit-ID: 9c03ee147193645be4c186d3688232fa438c57c7
Gitweb: http://git.kernel.org/tip/9c03ee147193645be4c186d3688232fa438c57c7
Author: Raghavendra K T <[email protected]>
AuthorDate: Sat, 16 Jan 2016 00:31:23 +0530
Committer: Ingo Molnar <[email protected]>
CommitDate: Tue, 19 Jan 2016 08:42:20 +0100
sched: Fix crash in sched_init_numa()
The following PowerPC commit:
c118baf80256 ("arch/powerpc/mm/numa.c: do not allocate bootmem memory for non
existing nodes")
avoids allocating bootmem memory for non existent nodes.
But when DEBUG_PER_CPU_MAPS=y is enabled, my powerNV system failed to boot
because in sched_init_numa(), cpumask_or() operation was done on
unallocated nodes.
Fix that by making cpumask_or() operation only on existing nodes.
[ Tested with and w/o DEBUG_PER_CPU_MAPS=y on x86 and PowerPC. ]
Reported-by: Jan Stancek <[email protected]>
Tested-by: Jan Stancek <[email protected]>
Signed-off-by: Raghavendra K T <[email protected]>
Cc: <[email protected]>
Cc: <[email protected]>
Cc: <[email protected]>
Cc: <[email protected]>
Cc: <[email protected]>
Cc: <[email protected]>
Cc: <[email protected]>
Cc: <[email protected]>
Cc: <[email protected]>
Cc: <[email protected]>
Cc: <[email protected]>
Link:
http://lkml.kernel.org/r/1452884483-11676-1-git-send-email-raghavendra...@linux.vnet.ibm.com
Signed-off-by: Ingo Molnar <[email protected]>
---
kernel/sched/core.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 44253ad..474658b 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -6840,7 +6840,7 @@ static void sched_init_numa(void)
sched_domains_numa_masks[i][j] = mask;
- for (k = 0; k < nr_node_ids; k++) {
+ for_each_node(k) {
if (node_distance(j, k) >
sched_domains_numa_distance[i])
continue;
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