linux-kernel - Re: [PATCH RFC v2 0/8] device mapper atomic write support

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Message-ID: <fe80050f-a887-452b-b8f1-86f2ea816228@kernel.dk>
Date: Fri, 17 Jan 2025 13:12:28 -0700
From: Jens Axboe <axboe@...nel.dk>
To: Mike Snitzer <snitzer@...nel.org>, John Garry <john.g.garry@...cle.com>,
 mpatocka@...hat.com
Cc: agk@...hat.com, hch@....de, song@...nel.org, yukuai3@...wei.com,
 kbusch@...nel.org, sagi@...mberg.me, James.Bottomley@...senpartnership.com,
 martin.petersen@...cle.com, linux-block@...r.kernel.org,
 dm-devel@...ts.linux.dev, linux-kernel@...r.kernel.org,
 linux-raid@...r.kernel.org, linux-nvme@...ts.infradead.org,
 linux-scsi@...r.kernel.org
Subject: Re: [PATCH RFC v2 0/8] device mapper atomic write support

On 1/17/25 1:09 PM, Mike Snitzer wrote:
> On Thu, Jan 16, 2025 at 05:02:53PM +0000, John Garry wrote:
>> This series introduces initial device mapper atomic write support.
>>
>> Since we already support stacking atomic writes limits, it's quite
>> straightforward to support.
>>
>> Personalities dm-linear, dm-stripe, and dm-raid1 are supported here, and
>> more personalities could be supported in future.
>>
>> This is still an RFC as I would like to test further.
>>
>> Based on 3d9a9e9a77c5 (block/for-6.14/block) block: limit disk max
>> sectors to (LLONG_MAX >> 9)
>>
>> Changes to v1:
>> - Generic block layer atomic writes enable flag and dm-table rework
>> - Add dm-stripe and dm-raid1 support
>> - Add bio_trim() patch
> 
> This all looks good.
> 
> Mikulas, we need Jens to pick up patches 1 and 2.  I wouldn't be
> opposed to him taking the entire set but I did notice the DM core
> (ioctl) version and the 3 DM targets that have had atomic support
> added need their version numbers bumped.  Given that, likely best for
> you (Mikulas) to pick up patches 3-8 after rebasing on Jens' latest
> for-6.14/block branch (once Jens picks up patches 1 and 2).
> 
> Jens, you cool with picking up patches 1+2 for 6.14?  Or too late and
> we circle back to this for 6.15?

I can do 1+2 for 6.14, they are pretty trivial.

-- 
Jens Axboe