linux-kernel - Re: [PATCH v2 6/9] mm/swap: handle swapcache lookup in swapin

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Message-ID: <87a5pg9qno.fsf@yhuang6-desk2.ccr.corp.intel.com>
Date: Mon, 08 Jan 2024 16:26:51 +0800
From: "Huang, Ying" <ying.huang@...el.com>
To: Kairui Song <ryncsn@...il.com>
Cc: linux-mm@...ck.org,  Kairui Song <kasong@...cent.com>,  Andrew Morton
 <akpm@...ux-foundation.org>,  Chris Li <chrisl@...nel.org>,  Hugh Dickins
 <hughd@...gle.com>,  Johannes Weiner <hannes@...xchg.org>,  Matthew Wilcox
 <willy@...radead.org>,  Michal Hocko <mhocko@...e.com>,  Yosry Ahmed
 <yosryahmed@...gle.com>,  David Hildenbrand <david@...hat.com>,
  linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 6/9] mm/swap: handle swapcache lookup in swapin_entry

Kairui Song <ryncsn@...il.com> writes:

> From: Kairui Song <kasong@...cent.com>
>
> Since all callers of swapin_entry need to check the swap cache first, we
> can merge this common routine into swapin_entry, so it can be shared and
> optimized later.
>
> Also introduce a enum to better represent possible swap cache usage, and
> add some comments about it, make the usage of swap cache easier to
> understand.

I don't find any benefit to do this.  The code line number isn't
reduced.  The concept of swap cache isn't hided either.

--
Best Regards,
Huang, Ying