linux-kernel - Re: [RFC][PATCH v3 0/9] mm: Use DIO for swap and fix NFS swapfiles

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Message-id: <163279868982.18792.10448745714922373194@noble.neil.brown.name>
Date:   Tue, 28 Sep 2021 13:11:29 +1000
From:   "NeilBrown" <neilb@...e.de>
To:     "David Howells" <dhowells@...hat.com>
Cc:     willy@...radead.org, hch@....de, trond.myklebust@...marydata.com,
        "Theodore Ts'o" <tytso@....edu>, linux-block@...r.kernel.org,
        ceph-devel@...r.kernel.org,
        "Trond Myklebust" <trond.myklebust@...merspace.com>,
        "Darrick J. Wong" <darrick.wong@...cle.com>,
        "Jeff Layton" <jlayton@...nel.org>,
        "Andreas Dilger" <adilger.kernel@...ger.ca>,
        "Anna Schumaker" <anna.schumaker@...app.com>, linux-mm@...ck.org,
        "Bob Liu" <bob.liu@...cle.com>,
        "Darrick J. Wong" <djwong@...nel.org>,
        "Josef Bacik" <josef@...icpanda.com>,
        "Seth Jennings" <sjenning@...ux.vnet.ibm.com>,
        "Jens Axboe" <axboe@...nel.dk>, linux-fsdevel@...r.kernel.org,
        linux-xfs@...r.kernel.org, linux-ext4@...r.kernel.org,
        linux-cifs@...r.kernel.org, "Chris Mason" <clm@...com>,
        "David Sterba" <dsterba@...e.com>,
        "Minchan Kim" <minchan@...nel.org>,
        "Steve French" <sfrench@...ba.org>,
        "Dan Magenheimer" <dan.magenheimer@...cle.com>,
        linux-nfs@...r.kernel.org, "Ilya Dryomov" <idryomov@...il.com>,
        linux-btrfs@...r.kernel.org, dhowells@...hat.com,
        viro@...iv.linux.org.uk, torvalds@...ux-foundation.org,
        linux-kernel@...r.kernel.org
Subject: Re: [RFC][PATCH v3 0/9] mm: Use DIO for swap and fix NFS swapfiles

On Sat, 25 Sep 2021, David Howells wrote:
> Whilst trying to make this work, I found that NFS's support for swapfiles
> seems to have been non-functional since Aug 2019 (I think), so the first
> patch fixes that.  Question is: do we actually *want* to keep this
> functionality, given that it seems that no one's tested it with an upstream
> kernel in the last couple of years?

SUSE definitely want to keep this functionality.  We have customers
using it.
I agree it would be good if it was being tested somewhere....

Thanks,
NeilBrown