Re: [PATCH v3 1/2] kho: add support for preserving vmalloc allocations

Mike Rapoport
2025-09-16T14:34:18Z

On Tue, Sep 16, 2025 at 10:05:16AM -0300, Jason Gunthorpe wrote:
> On Mon, Sep 15, 2025 at 07:36:25PM +0300, Mike Rapoport wrote:
> > > Under the covers it all uses the generic folio based code we already
> > > have, but we should have appropriate wrappers around that code that
> > > make clear these patterns.
> >
> > Right, but that does not mean that vmalloc preserve/restore should use the
> > public KHO APIs and avoid using internal methods.
>
> I think it does, the same way vmalloc is layered on top of the buddy
> allocator. Why wouldn't you build things in clean understandable
> layers like this?

Here it's more like __vmalloc_node_range_noprof() and get_vm_area() calling
__get_vm_area()

> Jason

--
Sincerely yours,
Mike.