Re: [PATCH v3 0/9] Optimize anonymous large folio unmapping

[Andrew Morton]

On Wed,  6 May 2026 15:14:55 +0530 Dev Jain <dev.jain@xxxxxxx> wrote:

> Speed up unmapping of anonymous large folios by clearing the ptes, and
> setting swap ptes, in one go.
> 
> ...
> 
> Performance as measured on a Linux VM on Apple M3 (arm64):
> 
> Vanilla - Mean: 37401913 ns, std dev: 12%
> Patched - Mean: 17420282 ns, std dev: 11%
> 
> No regression observed on 4K folios.
> 
> Performance as measured on bare metal x86:
> 
> Vanilla - mean: 54986286 ns, std dev: 1.5%
> Patched - mean: 51930795 ns, std dev: 3%

That looks nice.

I'll pass at this time, wait for reviewer input.  Most reviewers are
jetlagged and exhausted, so a resend might be needed ;)

Saskiko said a few things:
	https://sashiko.dev/#/patchset/20260506094504.2588857-1-dev.jain@xxxxxxx