On Tue, Nov 08, 2022 at 11:32:05AM -0800, Nhat Pham wrote:
> This helps determines the coldest zspages as candidates for writeback.
>
> Signed-off-by: Nhat Pham <nphamcs@xxxxxxxxx>
> ---
> mm/zsmalloc.c | 27 +++++++++++++++++++++++++++
> 1 file changed, 27 insertions(+)
>
> diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
> index 326faa751f0a..600c40121544 100644
> --- a/mm/zsmalloc.c
> +++ b/mm/zsmalloc.c
> @@ -239,6 +239,9 @@ struct zs_pool {
> /* Compact classes */
> struct shrinker shrinker;
>
> + /* List tracking the zspages in LRU order by most recently added object */
> + struct list_head lru;
> +
> #ifdef CONFIG_ZSMALLOC_STAT
> struct dentry *stat_dentry;
> #endif
> @@ -260,6 +263,10 @@ struct zspage {
> unsigned int freeobj;
> struct page *first_page;
> struct list_head list; /* fullness list */
> +
> + /* links the zspage to the lru list in the pool */
> + struct list_head lru;
Please put the LRU logic under config ZSMALLOC_LRU since we don't need
the additional logic to others.
