linux-kernel - Re: [PATCH v2] mm: add lazyfree folio to lru tail

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Message-ID: <883bf552-f339-474f-805b-4355ef49e526@redhat.com>
Date: Fri, 16 Aug 2024 12:19:58 +0200
From: David Hildenbrand <david@...hat.com>
To: gaoxu <gaoxu2@...or.com>, Andrew Morton <akpm@...ux-foundation.org>
Cc: "linux-mm@...ck.org" <linux-mm@...ck.org>,
 "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
 Suren Baghdasaryan <surenb@...gle.com>, Shaohua Li <shli@...com>,
 yipengxiang <yipengxiang@...or.com>, fengbaopeng <fengbaopeng@...or.com>,
 Kalesh Singh <kaleshsingh@...gle.com>
Subject: Re: [PATCH v2] mm: add lazyfree folio to lru tail

On 16.08.24 09:48, gaoxu wrote:
> Replace lruvec_add_folio with lruvec_add_folio_tail in the lru_lazyfree_fn:
> 1. The lazy-free folio is added to the LRU_INACTIVE_FILE list. If it's
>     moved to the LRU tail, it allows for faster release lazy-free folio and
>     reduces the impact on file refault.
> 2. When mglru is enabled, the lazy-free folio is reclaimabled and should be
>     added using lru_gen_add_folio(lruvec, folio, true) instead of
>     lru_gen_add_folio(lruvec, folio, false) for adding to gen.
> 
> With the change in place, workingset_refault_file is reduced by 33% in the
> continuous startup testing of the applications in the Android system.
> 

The patch subject does not match what you do in the patch -- at all.

"mm/swap: use lruvec_add_folio_tail() in lru_lazyfree()" ?


-- 
Cheers,

David / dhildenb