Commit d69043e8 authored Jan 29, 2011 by Anton Blanchard Committed by Benjamin Herrenschmidt Feb 07, 2011

powerpc/numa: Check for all VPHN changes

The hypervisor uses unsigned 1 byte counters to signal topology changes to
the OS. Since they can wrap we need to check for any difference, not just if
the hypervisor count is greater than the previous count.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

parent 5de16699

arch/powerpc/mm/numa.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -1341,7 +1341,7 @@ static int update_cpu_associativity_changes_mask(void)
		volatile u8 *hypervisor_counts = lppaca[cpu].vphn_assoc_counts;

		for (i = 0; i < distance_ref_points_depth; i++) {
		if (hypervisor_counts[i] > counts[i]) {
		if (hypervisor_counts[i] != counts[i]) {
		counts[i] = hypervisor_counts[i];
		changed = 1;
		}