On Sun 24-02-19 20:34:03, Pingfan Liu wrote: > There are NUMA machines with memory-less node. At present page allocator > builds the > full fallback info by build_zonelists(). But memblock allocator does not > utilize > this info. And for memory-less node, memblock allocator just falls back "node > 0", > without utilizing the nearest node. Unfortunately, the percpu section is > allocated > by memblock, which is accessed frequently after bootup. > > This series aims to improve the performance of per cpu section on memory-less > node > by feeding node's fallback info to memblock allocator on x86, like we do for > page > allocator. On other archs, it requires independent effort to setup node to > cpumask > map ahead.
Do you have any numbers to tell us how much does this improve the situation? -- Michal Hocko SUSE Labs
