Re: [PATCH 00/20] Add support for shared PTEs across processes

[Anthony Yznaga]

On 1/28/25 4:11 PM, Andrew Morton wrote:
> On Fri, 24 Jan 2025 15:54:34 -0800 Anthony Yznaga <anthony.yznaga@xxxxxxxxxx> wrote:
>
> > Some of the field deployments commonly see memory pages shared
> > across 1000s of processes. On x86_64, each page requires a PTE that
> > is 8 bytes long which is very small compared to the 4K page
> > size.
> Dumb question: why aren't these applications using huge pages?
They often are using hugetlbfs but would also benefit from having page 
tables shared for other kinds of memory such as shmem, tmpfs or dax.