Messages in this thread | | | Date | Mon, 18 Oct 2021 21:01:01 +0800 | Subject | Re: [PATCH v2 1/2] mm/vmalloc: fix numa spreading for large hash tables | From | Chen Wandun <> |
| |
在 2021/10/18 20:39, Matthew Wilcox 写道: > On Mon, Oct 18, 2021 at 08:37:09PM +0800, Chen Wandun wrote: >> Eric Dumazet reported a strange numa spreading info in [1], and found >> commit 121e6f3258fe ("mm/vmalloc: hugepage vmalloc mappings") introduced >> this issue [2]. > > I think the root problem here is that we have two meanings for > NUMA_NO_NODE. I tend to read it as "The memory can be allocated from > any node", but here it's used to mean "The memory should be spread over > every node". Should we split those out as -1 and -2? Yes, the intent of NUMA_NO_NODE some time is confused.
Besides,I think NUMA_NO_NODE should consider mempolicy in most cases in the kernel unless it point out explicitly memory can be allocated without considering mempolicy.
> . >
| |