linux-kernel - Re: [PATCH 0/3] block: blk_interposer

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Message-ID: <1ee7652e-b77f-6fa4-634c-ff6639037321@kernel.dk>
Date:   Fri, 11 Dec 2020 09:33:53 -0700
From:   Jens Axboe <axboe@...nel.dk>
To:     Mike Snitzer <snitzer@...hat.com>,
        Sergei Shtepa <sergei.shtepa@...am.com>, hch@....de
Cc:     "johannes.thumshirn@....com" <johannes.thumshirn@....com>,
        "koct9i@...il.com" <koct9i@...il.com>,
        "ming.lei@...hat.com" <ming.lei@...hat.com>,
        "hare@...e.de" <hare@...e.de>,
        "josef@...icpanda.com" <josef@...icpanda.com>,
        "steve@....org" <steve@....org>,
        "linux-block@...r.kernel.org" <linux-block@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Pavel Tide <Pavel.TIde@...am.com>, dm-devel@...hat.com
Subject: Re: [PATCH 0/3] block: blk_interposer - Block Layer Interposer

On 12/11/20 9:30 AM, Mike Snitzer wrote:
> While I still think there needs to be a proper _upstream_ consumer of
> blk_interposer as a condition of it going in.. I'll let others make the
> call.

That's an unequivocal rule.

> As such, I'll defer to Jens, Christoph and others on whether your
> minimalist blk_interposer hook is acceptable in the near-term.

I don't think so, we don't do short term bandaids just to plan on
ripping that out when the real functionality is there. IMHO, the dm
approach is the way to go - it provides exactly the functionality that
is needed in an appropriate way, instead of hacking some "interposer"
into the core block layer.

-- 
Jens Axboe