linux-kernel - Re: [PATCH -next 2/2] memcg: remove mem_cgroup

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Message-ID: <1189acd5-4908-4a51-a7bc-8b52a8489140@huaweicloud.com>
Date: Wed, 10 Dec 2025 11:06:55 +0800
From: Chen Ridong <chenridong@...weicloud.com>
To: kernel test robot <lkp@...el.com>, hannes@...xchg.org, mhocko@...nel.org,
 roman.gushchin@...ux.dev, shakeel.butt@...ux.dev, muchun.song@...ux.dev,
 akpm@...ux-foundation.org, axelrasmussen@...gle.com, yuanchu@...gle.com,
 weixugc@...gle.com, david@...nel.org, zhengqi.arch@...edance.com,
 lorenzo.stoakes@...cle.com
Cc: oe-kbuild-all@...ts.linux.dev, cgroups@...r.kernel.org,
 linux-mm@...ck.org, linux-kernel@...r.kernel.org, lujialin4@...wei.com
Subject: Re: [PATCH -next 2/2] memcg: remove mem_cgroup_size()



On 2025/12/10 9:35, kernel test robot wrote:
> Hi Chen,
> 
> kernel test robot noticed the following build errors:
> 
> [auto build test ERROR on next-20251209]
> 
> url:    https://github.com/intel-lab-lkp/linux/commits/Chen-Ridong/memcg-move-mem_cgroup_usage-memcontrol-v1-c/20251209-211854
> base:   next-20251209
> patch link:    https://lore.kernel.org/r/20251209130251.1988615-3-chenridong%40huaweicloud.com
> patch subject: [PATCH -next 2/2] memcg: remove mem_cgroup_size()
> config: i386-allnoconfig (https://download.01.org/0day-ci/archive/20251210/202512100924.LqJqXM7P-lkp@intel.com/config)
> compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251210/202512100924.LqJqXM7P-lkp@intel.com/reproduce)
> 
> If you fix the issue in a separate patch/commit (i.e. not just a new version of
> the same patch/commit), kindly add following tags
> | Reported-by: kernel test robot <lkp@...el.com>
> | Closes: https://lore.kernel.org/oe-kbuild-all/202512100924.LqJqXM7P-lkp@intel.com/
> 
> All errors (new ones prefixed by >>):
> 
>    mm/vmscan.c: In function 'apply_proportional_protection':
>>> mm/vmscan.c:2488:63: error: invalid use of undefined type 'struct mem_cgroup'
>     2488 |                 unsigned long usage = page_counter_read(&memcg->memory);
>          |                                                               ^~
> 
> 
> vim +2488 mm/vmscan.c
> 

Oh, I missed CONFIG_MEMCG=n case, will fix it, thanks.

-- 
Best regards,
Ridong