[PATCH v8 20/24] erofs: introduce generic decompression backend

[Christoph Hellwig]

On Thu, Aug 15, 2019 at 12:41:51PM +0800, Gao Xiang wrote:
> +static bool use_vmap;
> +module_param(use_vmap, bool, 0444);
> +MODULE_PARM_DESC(use_vmap, "Use vmap() instead of vm_map_ram() (default 0)");

And how would anyone know which to pick?