On 2016/8/26 23:29, Will Deacon wrote: > On Wed, Aug 24, 2016 at 03:44:49PM +0800, Zhen Lei wrote: >> 1. MAX_NUMNODES is base on CONFIG_NODES_SHIFT, the default value of the >> latter is very small now. >> 2. Suppose the default value of MAX_NUMNODES is enlarged to 64, so the >> size of numa_distance is 4K, it's still acceptable if run the Image >> on other processors. >> 3. It will make function __node_distance quicker than before. >> >> Signed-off-by: Zhen Lei <thunder.leizhen@xxxxxxxxxx> >> --- >> arch/arm64/include/asm/numa.h | 1 - >> arch/arm64/mm/numa.c | 74 +++---------------------------------------- >> 2 files changed, 5 insertions(+), 70 deletions(-) > > I fail to see the advantages of this patch. Do you have some compelling > performance figures or something? We can only put numa_distance_cnt on one node, so for the cpus of other nodes to access it should spend more time. I have not tested how many can be improved yet. I will try to get some data next week. > > Will > > . > -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
