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powerpc/pseries: Disable VPNH feature

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This feature triggers nasty races in the scheduler between the
rebuilding of the topology and the load balancing code, causing
the machine to hang.

Disable it for now until the races are fixed.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Benjamin Herrenschmidt 2011-03-09 13:00:14 +00:00
parent f2f6dad6ca
commit 36e8695ca5
1 changed files with 2 additions and 1 deletions
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3
arch/powerpc/mm/numa.c
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@ -1516,7 +1516,8 @@ int start_topology_update(void)
{
int rc = 0;
if (firmware_has_feature(FW_FEATURE_VPHN) &&
/* Disabled until races with load balancing are fixed */
if (0 && firmware_has_feature(FW_FEATURE_VPHN) &&
get_lppaca()->shared_proc) {
vphn_enabled = 1;
setup_cpu_associativity_change_counters();