Re: [PATCH 01/18] mm: fix NUMA node file count error in replace_page_cache()

[Joonsoo Kim]

On Mon, Apr 20, 2020 at 06:11:09PM -0400, Johannes Weiner wrote:
> When replacing one page with another one in the cache, we have to
> decrease the file count of the old page's NUMA node and increase the
> one of the new NUMA node, otherwise the old node leaks the count and
> the new node eventually underflows its counter.
> 
> Fixes: 74d609585d8b ("page cache: Add and replace pages using the XArray")
> Signed-off-by: Johannes Weiner <hannes@xxxxxxxxxxx>

Reviewed-by: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>

Thanks.