linux-kernel - Re: [PATCH 1/4] NTB: ntb_transport: Handle remapped contiguous region in vmalloc space

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Message-ID: <f32278ea-a1e0-4ef3-b611-da4d68b2658d@deltatee.com>
Date: Tue, 28 Oct 2025 09:45:30 -0600
From: Logan Gunthorpe <logang@...tatee.com>
To: Koichiro Den <den@...inux.co.jp>
Cc: ntb@...ts.linux.dev, linux-kernel@...r.kernel.org, jdmason@...zu.us,
 dave.jiang@...el.com, allenbh@...il.com
Subject: Re: [PATCH 1/4] NTB: ntb_transport: Handle remapped contiguous region
 in vmalloc space



On 2025-10-27 19:14, Koichiro Den wrote:
> 
> I agree there's room for improvement around this "double" mapping.
> I'll think about a follow-up patch to clean this up.
> 
>>
>> At the very least, I think these issues need to be mentioned in the
>> commit message.
> 
> As for the commit message, I think adding one more line like:
> "See relevant commit 061a785a114f ("ntb: Force physically contiguous allocation of rx ring buffers")"
> should be sufficient. What do you think?

Ah, I see why that is now. Thanks for the explanation.

Adding the link helps, but I still think the commit message needs to
mention why the memory is guaranteed to be physically contiguous.

Thanks,

Logan