linux-kernel - Re: [PATCH] null_blk: fix validation of block size

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Message-ID: <f3ae00c4-1db5-4aeb-ac85-5dfa1d69354b@oracle.com>
Date: Mon, 3 Jun 2024 14:54:00 +0100
From: John Garry <john.g.garry@...cle.com>
To: Damien Le Moal <dlemoal@...nel.org>, Andreas Hindborg <nmi@...aspace.dk>,
        Jens Axboe <axboe@...nel.dk>
Cc: Andreas Hindborg <a.hindborg@...sung.com>,
        Keith Busch
 <kbusch@...nel.org>, linux-block@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] null_blk: fix validation of block size

On 03/06/2024 00:59, Damien Le Moal wrote:
> On 6/2/24 19:57, John Garry wrote:
>> On 01/06/2024 21:23, Andreas Hindborg wrote:
>>> From: Andreas Hindborg<a.hindborg@...sung.com>
>>>
>>> Block size should be between 512
>>
>>> and 4096
>> Or PAGE_SIZE?
> PAGE_SIZE can be larger than 4096. But most drives are 512 or 4096 LBA-sized.

Sure, but maybe someone wants larger than 4096, like the LBS support.

Having said that, is there LBS support for nullb? I don't think so. I 
assume that PAGE_SIZE or 4096 limit would need to go for that.

Cheers,
John