Re: [RFC PATCH 2/2] mm, vmscan: cleanup inactive_list_is_low

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On Tuesday, January 10, 2017 8:56 PM Michal Hocko wrote: 
> 
> From: Michal Hocko <mhocko@xxxxxxxx>
> 
> inactive_list_is_low is duplicating logic implemented by
> lruvec_lru_size_eligibe_zones. Let's use the dedicated function to get
> the number of eligible pages on the lru list and ask use lruvec_lru_size
> to get the total LRU lize only when the tracing is really requested. We
> are still iterating over all LRUs two times in that case but a)
> inactive_list_is_low is not a hot path and b) this can be addressed at
> the tracing layer and only evaluate arguments only when the tracing is
> enabled in future if that ever matters.
> 
> Signed-off-by: Michal Hocko <mhocko@xxxxxxxx>
> ---
Acked-by: Hillf Danton <hillf.zj@xxxxxxxxxxxxxxx>


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