Re: [PATCH 00/46] Based on latest mm-unstable (85b44c25cd1e).

[David Hildenbrand]

On 05.01.23 11:17, James Houghton wrote:
> This series introduces the concept of HugeTLB high-granularity mapping
> (HGM). This series teaches HugeTLB how to map HugeTLB pages at
> high-granularity, similar to how THPs can be PTE-mapped.
>
> Support for HGM in this series is for MAP_SHARED VMAs on x86 only. Other
> architectures and (some) support for MAP_PRIVATE will come later.

Why even care about the complexity of COW-sharable anon pages? TBH, I'd 
just limit this to MAP_SHARED and call it a day. Sure, we can come up 
with use cases for everything (snapshotting VMs using fork while also 
support optimized postcopy), but I think this would need some real 
justification for the added complexity and possible (likely!) issues.

--
Thanks,

David / dhildenb