Re: [PATCH] docs/vm: add documentation of memory models

From: Mike Rapoport
Date: Wed Apr 24 2019 - 07:35:20 EST

On Wed, Apr 24, 2019 at 04:20:02PM +0530, Anshuman Khandual wrote:
> On 04/24/2019 03:58 PM, Mike Rapoport wrote:
> > +To use vmemmap, an architecture has to reserve a range of virtual
> > +addresses that will map the physical pages containing the memory
> > +map. and make sure that `vmemmap` points to that range. In addition,
> > +the architecture should implement :c:func:`vmemmap_populate` method
> > +that will allocate the physical memory and create page tables for the
> > +virtual memory map. If an architecture does not have any special
> > +requirements for the vmemmap mappings, it can use default
> > +:c:func:`vmemmap_populate_basepages` provided by the generic memory
> > +management.
> Just to complete it, could you also include struct vmem_altmap and how it
> can contribute towards the physical backing for vmemmap virtual mapping.
> Otherwise the write up looks complete.

Sure, but I'd prefer having it as a separate patch.

Sincerely yours,