Re: [PATCH v3 14/17] cxl: docs/allocation/page-allocator

Matthew Wilcox
2025-05-12T17:52:37Z

On Mon, May 12, 2025 at 12:38:47PM -0400, Gregory Price wrote:
> On Mon, May 12, 2025 at 05:34:56PM +0100, Matthew Wilcox wrote:
> > On Mon, May 12, 2025 at 12:21:31PM -0400, Gregory Price wrote:
> > > Document some interesting interactions that occur when exposing CXL
> > > memory capacity to page allocator.
> >
> > We should not do this. Asking the page allocator for memory (eg for
> > slab) should never return memory on CXL. There need to be special
> > interfaces for clients that know they can tolerate the added latency.
> >
> > NAK this concept, and NAK this specific document. I have no comment on
> > the previous documents.
>
> This describes what presently exists, so i'm not sure of what value a
> NAK here is.
>
> Feel free to submit patches that deletes the existing code if you want
> it removed from the documentation.

Who sneaked that in when?