Re: [PATCH 0/6] make memblock allocator utilize the node's fallback info

[Michal Hocko]

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