[ovs-dev] [PATCH 19/24] datapath: backport: ovs: do not allocate memory from offline numa node

[Pravin B Shelar]

Upstream commit:
    commit 598c12d0ba6de9060f04999746eb1e015774044b
    Author: Konstantin Khlebnikov <khlebnikov at yandex-team.ru>

    ovs: do not allocate memory from offline numa node

    When openvswitch tries allocate memory from offline numa node 0:
    stats = kmem_cache_alloc_node(flow_stats_cache, GFP_KERNEL | __GFP_ZERO, 0)
    It catches VM_BUG_ON(nid < 0 || nid >= MAX_NUMNODES || !node_online(nid))
    [ replaced with VM_WARN_ON(!node_online(nid)) recently ] in linux/gfp.h
    This patch disables numa affinity in this case.

    Signed-off-by: Konstantin Khlebnikov <khlebnikov at yandex-team.ru>
    Acked-by: Pravin B Shelar <pshelar at ovn.org>
    Signed-off-by: David S. Miller <davem at davemloft.net>

Signed-off-by: Pravin B Shelar <pshelar at ovn.org>
---
 datapath/flow_table.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/datapath/flow_table.c b/datapath/flow_table.c
index dd77922..466b2b7 100644
--- a/datapath/flow_table.c
+++ b/datapath/flow_table.c
@@ -99,7 +99,8 @@ struct sw_flow *ovs_flow_alloc(void)
 
 	/* Initialize the default stat node. */
 	stats = kmem_cache_alloc_node(flow_stats_cache,
-				      GFP_KERNEL | __GFP_ZERO, 0);
+				      GFP_KERNEL | __GFP_ZERO,
+				      node_online(0) ? 0 : NUMA_NO_NODE);
 	if (!stats)
 		goto err;
 
-- 
1.9.1