linux-kernel - Re: [PATCH v8 0/5] Introduce provisioning primitives

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Message-ID: <ZSNANlreccIVXuo+@dread.disaster.area>
Date:   Mon, 9 Oct 2023 10:50:14 +1100
From:   Dave Chinner <david@...morbit.com>
To:     Sarthak Kukreti <sarthakkukreti@...omium.org>
Cc:     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>,
        Alasdair Kergon <agk@...hat.com>,
        Mike Snitzer <snitzer@...nel.org>,
        Christoph Hellwig <hch@...radead.org>,
        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 v8 0/5] Introduce provisioning primitives

On Fri, Oct 06, 2023 at 06:28:12PM -0700, Sarthak Kukreti wrote:
> Hi,
> 
> This patch series is version 8 of the patch series to introduce
> block-level provisioning mechanism (original [1]), which is useful for provisioning
> space across thinly provisioned storage architectures (loop devices
> backed by sparse files, dm-thin devices, virtio-blk). This series has
> minimal changes over v7[2].
> 
> This patch series is rebased from the linux-dm/dm-6.5-provision-support [1] on to
> (cac405a3bfa2 Merge tag 'for-6.6-rc3-tag'). In addition, there's an
> additional patch to allow passing through an unshare intent via REQ_OP_PROVISION
> (suggested by Darrick in [4]).

The XFS patches I just posted were smoke tested a while back against
loop devices and then forward ported to this patchset. Good for
testing that userspace driven file preallocation gets propagated by
the filesystem down to the backing device correctly and that
subsequent IO to the file then does the right thing (e.g. fio
testing using fallocate() to set up the files being written to)....

-Dave.
-- 
Dave Chinner
david@...morbit.com