Re: [PATCH v3 2/2] mm/compaction: make proactive compaction high watermark configurable via sysctl

[Andrew Morton]

On Mon, 27 Jan 2025 22:50:20 +0100 Michal Clapinski <mclapinski@xxxxxxxxxx> wrote:

> Currently, the difference between the high and low watermarks for
> proactive compaction is hardcoded to 10. This hardcoded difference is
> too large for free page reporting to work well.
> 
> Add a new sysctl, `compaction_proactiveness_leeway`, to control the
> difference between the high and low watermarks.
> 

Oh dear, yet another tunable.  Is there any way in which we can
acceptably improve the kernel without adding this?