linux-kernel - Re: [RFC 0/6] Add multiple address spaces support to VDUSE

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Message-ID: <aFjhbCnEI7KZW8Sr@infradead.org>
Date: Sun, 22 Jun 2025 22:09:00 -0700
From: Christoph Hellwig <hch@...radead.org>
To: Eugenio Perez Martin <eperezma@...hat.com>
Cc: Christoph Hellwig <hch@...radead.org>, jasowang@...hat.com,
	Yongji Xie <xieyongji@...edance.com>, Cindy Lu <lulu@...hat.com>,
	linux-kernel@...r.kernel.org,
	Stefano Garzarella <sgarzare@...hat.com>,
	Stefan Hajnoczi <stefanha@...hat.com>,
	Maxime Coquelin <mcoqueli@...hat.com>,
	"Michael S. Tsirkin" <mst@...hat.com>,
	virtualization@...ts.linux.dev,
	Xuan Zhuo <xuanzhuo@...ux.alibaba.com>,
	Laurent Vivier <lvivier@...hat.com>
Subject: Re: [RFC 0/6] Add multiple address spaces support to VDUSE

On Fri, Jun 20, 2025 at 08:25:50AM +0200, Eugenio Perez Martin wrote:
> This code does not touch the DMA API at all. Actually, we could even
> remove all the DMA code and these changes would work the same. Can't
> we just continue with this series and remove the abuse of the DMA API
> in parallel?

But it touches vduse.  And vduse is marked broken because it still has
this long standing issues.  You don't add "ehancements" to code marked
BROKEN begfore fixing that.