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

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Date:   Fri, 11 Dec 2020 17:56:07 +0100
From:   Hannes Reinecke <hare@...e.de>
To:     Jens Axboe <axboe@...nel.dk>, 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>,
        "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 5:33 PM, Jens Axboe wrote:
> 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.
> 
Which is my plan, too.

I'll be working with the Veeam folks to present a joint patchset 
(including the DM bits) for the next round.

Cheers,

Hannes
-- 
Dr. Hannes Reinecke                Kernel Storage Architect
hare@...e.de                              +49 911 74053 688
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