Re: [PATCH v5.10 0/8] preserve DMA offsets when using swiotlb

On Mon, Apr 05, 2021 at 09:02:22PM +0000, Jianxiong Gao wrote:

Hi all,

This series of backports fixes the SWIOTLB library to maintain the page offset when mapping a DMA address. The bug that motivated this patch series manifested when running a 5.4 kernel as a SEV guest with an NVMe device. However, any device that infers information from the page offset and is accessed through the SWIOTLB will benefit from this bug fix.

But this is 5.10, not 5.4, why mention 5.4 here?

And you are backporting a 5.12-rc feature to 5.10, what happened to 5.11?

Why not just use 5.12 to get this new feature instead of using an older kernel? It's not like this has ever worked before, right?

thanks,

greg k-h