On Mon, Feb 08, 2021 at 10:27:18AM +0100, David Hildenbrand wrote: > On 08.02.21 09:49, Mike Rapoport wrote: > > Some questions (and request to document the answers) as we now allow to have > unmovable allocations all over the place and I don't see a single comment > regarding that in the cover letter: > > 1. How will the issue of plenty of unmovable allocations for user space be > tackled in the future? > > 2. How has this issue been documented? E.g., interaction with ZONE_MOVABLE > and CMA, alloc_conig_range()/alloc_contig_pages?. Secretmem sets the mappings gfp mask to GFP_HIGHUSER, so it does not allocate movable pages at the first place. > 3. How are the plans to support migration in the future and which interface > changes will be required? (Michal mentioned some good points to make this > configurable via the interface, we should plan ahead and document) The only interface change required is an addition of bit value for syscall flags, I really think it can be documented with the addition of migration or any other feature for that sake. -- Sincerely yours, Mike.
