Re: revert scope for 5.8, was Re: dma-pool fixes

Christoph Hellwig
2020-08-03T06:44:48Z

On Sun, Aug 02, 2020 at 09:14:41PM -0700, David Rientjes wrote:
> Christoph: since we have atomic DMA coherent pools in 5.8 now, recall our
> previous discussions, including Greg KH, regarding backports to stable
> trees (we are interested in 5.4 and 5.6) of this support for the purposes
> of confidential VM users who wish to run their own SEV-enabled guests in
> cloud.
>
> Would you have any objections to backports being offered for this support
> now? We can prepare them immediately. Or, if you would prefer we hold
> off for a while, please let me know and we can delay it until you are more
> comfortable. (For confidential VM users, the ability to run your own
> unmodified stable kernel is a much different security story than a guest
> modified by the cloud provider.)

Before we start backporting I think we need the two fixes from
the "dma pool fixes" series. Can you start reviewing them? I also
think we should probably wait at least until -rc2 for any fallout
before starting the backport.