Re: [LSF/MM/BPF TOPIC] 64k (or 16k) base page size on x86

[Peter Zijlstra]

On Thu, Feb 19, 2026 at 03:08:51PM +0000, Kiryl Shutsemau wrote:
> No, there's no new hardware (that I know of). I want to explore what page size
> means.
> 
> The kernel uses the same value - PAGE_SIZE - for two things:
> 
>   - the order-0 buddy allocation size;
> 
>   - the granularity of virtual address space mapping;
> 
> I think we can benefit from separating these two meanings and allowing
> order-0 allocations to be larger than the virtual address space covered by a
> PTE entry.

Didn't AA do this a decade ago or somesuch?