Re: [RFC PATCH] x86, numa: always initialize all possible nodes
From: Dave Hansen
Date: Thu Jan 24 2019 - 14:10:53 EST
On 1/24/19 6:17 AM, Michal Hocko wrote:
> and nr_cpus set to 4. The underlying reason is tha the device is bound
> to node 2 which doesn't have any memory and init_cpu_to_node only
> initializes memory-less nodes for possible cpus which nr_cpus restrics.
> This in turn means that proper zonelists are not allocated and the page
> allocator blows up.
This looks OK to me.
Could we add a few DEBUG_VM checks that *look* for these invalid
zonelists? Or, would our existing list debugging have caught this?
Basically, is this bug also a sign that we need better debugging around
this?