On Tue, Dec 16, 2025 at 08:34:40PM +0800, Chen Ridong <chenridong@huaweicloud.com> wrote:
> In my v2 patch, I was reading the usage directly:
> 
> +		unsigned long usage = page_counter_read(&memcg->memory);
> 
> This works fine when CONFIG_MEMCG=y, but fails to compile when memory cgroups are disabled. To
> handle this, I initially added #ifdef CONFIG_MEMCG guards.

Ah, !CONFIG_MEMCG, I get it now. Sorry for the noise.

Michal