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

[David Laight]

On Thu, 19 Feb 2026 15:08:51 +0000
Kiryl Shutsemau <kas@xxxxxxxxxx> 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;

Also the 'random' buffers that are PAGE_SIZE rather than 4k.

I also wonder how is affects mmap of kernel memory and the alignement
of PCIe windows (etc).

	David