linux-kernel - Re: [PATCH v3 2/4] mm: change to return bool for isolate_lru

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Date:   Wed, 15 Feb 2023 15:39:30 +0000
From:   Matthew Wilcox <willy@...radead.org>
To:     Baolin Wang <baolin.wang@...ux.alibaba.com>
Cc:     akpm@...ux-foundation.org, torvalds@...ux-foundation.org,
        sj@...nel.org, hannes@...xchg.org, mhocko@...nel.org,
        roman.gushchin@...ux.dev, shakeelb@...gle.com,
        muchun.song@...ux.dev, naoya.horiguchi@....com,
        linmiaohe@...wei.com, david@...hat.com, osalvador@...e.de,
        mike.kravetz@...cle.com, damon@...ts.linux.dev,
        cgroups@...r.kernel.org, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 2/4] mm: change to return bool for isolate_lru_page()

On Wed, Feb 15, 2023 at 06:39:35PM +0800, Baolin Wang wrote:
> The isolate_lru_page() can only return 0 or -EBUSY, and most users did
> not care about the negative error of isolate_lru_page(), except one user
> in add_page_for_migration(). So we can convert the isolate_lru_page() to
> return a boolean value, which can help to make the code more clear when
> checking the return value of isolate_lru_page().
> 
> Also convert all users' logic of checking the isolation state.
> 
> No functional changes intended.
> 
> Signed-off-by: Baolin Wang <baolin.wang@...ux.alibaba.com>
> Acked-by: David Hildenbrand <david@...hat.com>

Reviewed-by: Matthew Wilcox (Oracle) <willy@...radead.org>