Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Message-ID: <90b6d45e-61a5-3eb3-7525-8467f1a67587@kernel.dk>
Date:   Fri, 30 Sep 2022 15:24:44 -0600
MIME-Version: 1.0
User-Agent: Mozilla/5.0 (X11; Linux aarch64; rv:102.0) Gecko/20100101
 Thunderbird/102.3.0
Subject: Re: [PATCH v15 00/13] support zoned block devices with non-power-of-2
 zone sizes
Content-Language: en-US
To:     Bart Van Assche <bvanassche@acm.org>,
        Pankaj Raghav <p.raghav@samsung.com>, hch@lst.de,
        Keith Busch <kbusch@kernel.org>
Cc:     jaegeuk@kernel.org, agk@redhat.com, gost.dev@samsung.com,
        snitzer@kernel.org, damien.lemoal@opensource.wdc.com,
        linux-kernel@vger.kernel.org, hare@suse.de,
        matias.bjorling@wdc.com, Johannes.Thumshirn@wdc.com,
        linux-block@vger.kernel.org, linux-nvme@lists.infradead.org,
        pankydev8@gmail.com, dm-devel@redhat.com,
        "Martin K. Petersen" <martin.petersen@oracle.com>
References: <CGME20220923173619eucas1p13e645adbe1c8eb62fb48b52c0248ed65@eucas1p1.samsung.com>
 <20220923173618.6899-1-p.raghav@samsung.com>
 <5e9d678f-ffea-e015-53d8-7e80f3deda1e@samsung.com>
 <bd9479f4-ff87-6e5d-296e-e31e669fb148@kernel.dk>
 <0e5088a5-5408-c5bd-bf97-00803cb5faed@acm.org>
From:   Jens Axboe <axboe@kernel.dk>
In-Reply-To: <0e5088a5-5408-c5bd-bf97-00803cb5faed@acm.org>
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 7bit
Precedence: bulk

On 9/30/22 1:38 PM, Bart Van Assche wrote:
> On 9/30/22 08:13, Jens Axboe wrote:
>> On 9/29/22 12:31 AM, Pankaj Raghav wrote:
>>>> Hi Jens,
>>>> ?? Please consider this patch series for the 6.1 release.
>>>>
>>>
>>> Hi Jens, Christoph, and Keith,
>>> ? All the patches have a Reviewed-by tag at this point. Can we queue this up
>>> for 6.1?
>>
>> It's getting pretty late for 6.1 and I'd really like to have both Christoph
>> and Martin sign off on these changes.
> 
> Hi Jens,
> 
> Agreed that it's getting late for 6.1.
> 
> Since this has not been mentioned in the cover letter, I want to add
> that in the near future we will need these patches for Android
> devices. JEDEC is working on supporting zoned storage for UFS devices,
> the storage devices used in all modern Android phones. Although it
> would be possible to make the offset between zone starts a power of
> two by inserting gap zones between data zones, UFS vendors asked not
> to do this and hence need support for zone sizes that are not a power
> of two. An advantage of not having to deal with gap zones is better
> filesystem performance since filesystem extents cannot span gap zones.
> Having to split filesystem extents because of gap zones reduces
> filesystem performance.

Noted. I'll find some time to review this as well separately, once we're
on the other side of the merge window.

-- 
Jens Axboe