Re: [PATCH 0/3] Optimize mremap() by PTE-batching

[Anshuman Khandual <anshuman.khandual@arm.com>]

On 5/6/25 10:30, Dev Jain wrote:
> Use PTE batching to optimize mremap().
> 
> Mapping 512K of memory, memsetting it, remapping it to src + 512K, and
> munmapping it 10,000 times, the average execution time reduces from 1.9 to
> 1.2 seconds, giving a 37% performance optimization. (Apple M3)

That's impressive improvement. But could you please re-organize the test
description into a pseudo code format or better provide the test program
itself (which should be compact anyways) just to be more clear about the
scenario where this helps.

> 
> Dev Jain (3):
>   mm: Call pointers to ptes as ptep
>   mm: Add generic helper to hint a large folio
>   mm: Optimize mremap() by PTE batching
> 
>  include/linux/pgtable.h | 16 +++++++++++++++
>  mm/mremap.c             | 44 +++++++++++++++++++++++++++--------------
>  2 files changed, 45 insertions(+), 15 deletions(-)
>