linux-kernel - Re: [PATCH] mm: zswap: support exclusive loads

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Message-ID: <ZHbilD8TbMF3+bWz@infradead.org>
Date:   Tue, 30 May 2023 23:00:52 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     Johannes Weiner <hannes@...xchg.org>
Cc:     Yosry Ahmed <yosryahmed@...gle.com>,
        Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Seth Jennings <sjenning@...hat.com>,
        Dan Streetman <ddstreet@...e.org>,
        Vitaly Wool <vitaly.wool@...sulko.com>,
        Nhat Pham <nphamcs@...il.com>,
        Domenico Cerasuolo <cerasuolodomenico@...il.com>,
        Yu Zhao <yuzhao@...gle.com>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mm: zswap: support exclusive loads

On Tue, May 30, 2023 at 07:54:47PM -0400, Johannes Weiner wrote:
> Somewhat tangential, but is there still a point to the frontswap
> layer? It seems usecases other than zswap have never materialized, at
> least not in tree. Life would be a lot easier if we were to just
> hardcode the zswap callbacks in the swap functions.

I've been wanting to remove it for a while, as it really is rather
pointless.