Re: [PATCH] iommu/amd: Add kernel parameters to limit V1 page-sizes

[Jason Gunthorpe]

On Thu, Sep 05, 2024 at 05:13:53PM +0200, Joerg Roedel wrote:
> On Thu, Sep 05, 2024 at 09:05:31AM -0300, Jason Gunthorpe wrote:
> > On Thu, Sep 05, 2024 at 09:34:07AM +0200, Joerg Roedel wrote:
> > > On Thu, Sep 05, 2024 at 03:31:08PM +0800, Baolu Lu wrote:
> > > > "iommu.nohugepages=1"?
> > > 
> > > Generally yes, but that requires to touch all drivers to make the
> > > behavior consistent. We can start this effort on-top of this change, if
> > > desired.
> > 
> > Let's at least use the same keyword that already exists though??
> 
> You mean amd_iommu=sp_off? I am not in favour of that, in the Linux
> world the term 'hugepage' is more common than 'superpage'. So I
> would avoid spreading the use of the later. We can extend that later to
> the iommu.nohugepages parameter suggested by Baolu.

I see, okay, let me check with some people if the mlx5 part is Ok

Thanks,
Jason