From: Damien Le Moal <dlemoal@kernel.org>
To: "韦龙平(Groot)" <weilongping@oppo.com>,
"Christoph Hellwig" <hch@infradead.org>
Cc: "dm-devel@lists.linux.dev" <dm-devel@lists.linux.dev>,
"snitzer@redhat.com" <snitzer@redhat.com>,
"bvanassche@acm.org" <bvanassche@acm.org>,
"ebiggers@google.com" <ebiggers@google.com>
Subject: Re: [PATCH] dm-crypt: set max_io_len as chunk_sectors of zoned device
Date: Mon, 25 Nov 2024 15:03:28 +0900 [thread overview]
Message-ID: <f62a05bc-4127-4271-9ee8-e9c879e9c6aa@kernel.org> (raw)
In-Reply-To: <SEZPR02MB7967C480572B3B15D5F57F92D42E2@SEZPR02MB7967.apcprd02.prod.outlook.com>
On 11/25/24 2:58 PM, 韦龙平(Groot) wrote:
> On Sun, 24 Nov 2024 21:00:52 -0800, Christoph Hellwig wrote:
>> On Mon, Nov 25, 2024 at 11:22:51AM +0800, LongPing Wei wrote:
>>> When dm level submit a bio with bi_size > max_sectors_kb of lower device,
>>> blk_mq_submit_bio will split it into several ones with limited bi_size.
>>> It may be a potential unordered issue as it breaks the ZWL design in dm
>>> on 6.6.
>>
>> What is ZWL? And why mention 6.6? And why do you care about ordering?
> ZWL is Zone-Write-Locking and it was replaced by Zone-Write-Plugging on 6.12.
6.10.
>> There is no real ordering requirement in the block layer.
> According to the design constraints of zoned device, write requests in the same
> zone must be dispatched in order of address and there can be no holes in the middle
--
Damien Le Moal
Western Digital Research
next prev parent reply other threads:[~2024-11-25 6:03 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-11-25 5:58 [PATCH] dm-crypt: set max_io_len as chunk_sectors of zoned device 韦龙平(Groot)
2024-11-25 6:01 ` Christoph Hellwig
2024-11-25 6:07 ` Damien Le Moal
2024-11-25 6:11 ` Christoph Hellwig
2024-11-25 7:49 ` LongPing Wei
2024-12-10 16:20 ` Mike Snitzer
2024-12-11 2:00 ` LongPing Wei
2024-11-25 7:43 ` [PATCH] " LongPing Wei
2024-11-25 6:03 ` Damien Le Moal [this message]
-- strict thread matches above, loose matches on Subject: below --
2024-11-25 3:22 LongPing Wei
2024-11-25 5:00 ` Christoph Hellwig
2024-11-25 6:02 ` Damien Le Moal
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