Re: [PATCH v3 12/13] mm: Add sysctl vm.compress-batching switch for compress batching during swapout.

Johannes Weiner
2024-11-07T17:34:14Z

On Wed, Nov 06, 2024 at 11:21:04AM -0800, Kanchana P Sridhar wrote:
> The sysctl vm.compress-batching parameter is 0 by default. If the platform
> has Intel IAA, the user can run experiments with IAA compress batching of
> large folios in zswap_store() as follows:
>
> sysctl vm.compress-batching=1
> echo deflate-iaa > /sys/module/zswap/parameters/compressor

A sysctl seems uncalled for. Can't the batching code be gated on
deflate-iaa being the compressor? It can still be generalized later if
another compressor is shown to benefit from batching.