linux-kernel - Re: [PATCH v7 0/5] Introduce provisioning primitives

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Message-ID: <ZGeKm+jcBxzkMXQs@redhat.com>
Date:   Fri, 19 May 2023 10:41:31 -0400
From:   Mike Snitzer <snitzer@...nel.org>
To:     Christoph Hellwig <hch@...radead.org>
Cc:     Sarthak Kukreti <sarthakkukreti@...omium.org>, dm-devel@...hat.com,
        linux-block@...r.kernel.org, linux-ext4@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        Jens Axboe <axboe@...nel.dk>,
        "Michael S. Tsirkin" <mst@...hat.com>,
        Jason Wang <jasowang@...hat.com>,
        Stefan Hajnoczi <stefanha@...hat.com>,
        Alasdair Kergon <agk@...hat.com>,
        Brian Foster <bfoster@...hat.com>,
        Theodore Ts'o <tytso@....edu>,
        Andreas Dilger <adilger.kernel@...ger.ca>,
        Bart Van Assche <bvanassche@...gle.com>,
        "Darrick J. Wong" <djwong@...nel.org>
Subject: Re: [PATCH v7 0/5] Introduce provisioning primitives

On Fri, May 19 2023 at 12:09P -0400,
Christoph Hellwig <hch@...radead.org> wrote:

> FYI, I really don't think this primitive is a good idea.  In the
> concept of non-overwritable storage (NAND, SMR drives) the entire
> concept of a one-shoot 'provisioning' that will guarantee later writes
> are always possible is simply bogus.

Valid point for sure, such storage shouldn't advertise support (and
will return -EOPNOTSUPP).

But the primitive still has utility for other classes of storage.