linux-kernel - Re: [PATCH v3 9/9] mm: Remove swap BIO paths and only use DIO paths

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Message-ID: <YU84rYOyyXDP3wjp@casper.infradead.org>
Date:   Sat, 25 Sep 2021 15:56:45 +0100
From:   Matthew Wilcox <willy@...radead.org>
To:     David Howells <dhowells@...hat.com>
Cc:     hch@....de, trond.myklebust@...marydata.com,
        Jens Axboe <axboe@...nel.dk>,
        "Darrick J. Wong" <djwong@...nel.org>, linux-block@...r.kernel.org,
        linux-xfs@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-mm@...ck.org, darrick.wong@...cle.com,
        viro@...iv.linux.org.uk, jlayton@...nel.org,
        torvalds@...ux-foundation.org, linux-nfs@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 9/9] mm: Remove swap BIO paths and only use DIO paths

On Fri, Sep 24, 2021 at 06:19:23PM +0100, David Howells wrote:
> Delete the BIO-generating swap read/write paths and always use ->swap_rw().
> This puts the mapping layer in the filesystem.

Is SWP_FS_OPS now unused after this patch?

Also, do we still need ->swap_activate and ->swap_deactivate?