Re: [RFC v2 PATCH 5/5] migrate,sysfs: add pagecache promotion

Gregory Price
2024-12-27T16:04:16Z

On Fri, Dec 27, 2024 at 04:31:48PM +0530, Donet Tom wrote:
>
> > folio_clear_referenced(folio);
> > workingset_activation(folio);
> > + } else {
> > +
>
> In the current implementation, promotion will not work if we enable MGLRU,
> right?
> Is there any specific reason we are not enabling promotion with MGLRU?
>

folio_mark_accessed may not be the best place to interpose for MGLRU,
since MGLRU's semantics are so different. I didn't want to dive that
deep until I could show traditional LRU benefit.

Certainly open to ideas if you're familiar with MGLRU semantics.

~Gregory