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
