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

[Kiryl Shutsemau]

On Thu, Feb 19, 2026 at 04:20:45PM +0100, Peter Zijlstra wrote:
> On Thu, Feb 19, 2026 at 04:17:29PM +0100, Peter Zijlstra wrote:
> > 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?
> 
>   https://lwn.net/Articles/240914/

Oh, 2007. It predates me in kernel. Will read up. Thanks!

-- 
  Kiryl Shutsemau / Kirill A. Shutemov