linux-kernel - Re: [PATCH v5 0/5] RAID 0/1/10 atomic write support

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Message-ID: <ef021fd8-1cfe-49d6-a6a2-c9745cf61441@oracle.com>
Date: Tue, 19 Nov 2024 17:05:58 +0000
From: John Garry <john.g.garry@...cle.com>
To: axboe@...nel.dk, song@...nel.org, yukuai3@...wei.com, hch@....de
Cc: linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-raid@...r.kernel.org, martin.petersen@...cle.com
Subject: Re: [PATCH v5 0/5] RAID 0/1/10 atomic write support

On 18/11/2024 10:50, John Garry wrote:
> This series introduces atomic write support for software RAID 0/1/10.
> 
> The main changes are to ensure that we can calculate the stacked device
> request_queue limits appropriately for atomic writes. Fundamentally, if
> some bottom does not support atomic writes, then atomic writes are not
> supported for the top device. Furthermore, the atomic writes limits are
> the lowest common supported limits from all bottom devices.
> 
> Flag BLK_FEAT_ATOMIC_WRITES_STACKED is introduced to enable atomic writes
> for stacked devices selectively. This ensures that we can analyze and test
> atomic writes support per individual md/dm personality (prior to
> enabling).
> 
> Based on 88d47f629313 (block/for-6.13/block) Merge tag
> 'md-6.13-20241115' ofhttps://git.kernel.org/pub/scm/linux/kernel/git/mdraid/linux 
> into for-6.13/block

Hi Jens,

In case you are planning on sending a 2nd batch of new dev for 6.13, I 
think that this is in mergeable state.

If not, I'll repost for 6.14 later.

Thanks,
John