Re: [PATCH] mm: memcg supports freeing the specified zone's memory

[Michal Hocko]

On Fri 17-01-25 18:25:13, zhiguojiang wrote:
[...]
> > Could you describe problem that you are trying to solve?
>
> In a dual zone system with both movable and normal zones, we encountered
> the problem where the GFP_KERNEL flag failed to allocate memory from the
> normal zone and crashed. Analyzing the logs, we found that there was
> very little free memory in the normal zone, but more free memory in the
> movable zone at this time. Therefore, we want to reclaim accurately
> the normal zone's memory occupied by memcg through
> try_to_free_mem_cgroup_pages().

Could you be more specific please? What was the allocation request. Has
the allocation or charge failed? Do you have allocation failure memory
info or oom killer report?
-- 
Michal Hocko
SUSE Labs