linux-kernel - Re: [PATCH v2 09/14] mm: memcg: rename memcg_oom

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Date: Tue, 25 Jun 2024 09:08:45 +0200
From: Michal Hocko <mhocko@...e.com>
To: Roman Gushchin <roman.gushchin@...ux.dev>
Cc: Andrew Morton <akpm@...ux-foundation.org>,
	Johannes Weiner <hannes@...xchg.org>,
	Shakeel Butt <shakeel.butt@...ux.dev>,
	Muchun Song <muchun.song@...ux.dev>, linux-kernel@...r.kernel.org,
	cgroups@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH v2 09/14] mm: memcg: rename memcg_oom_recover()

On Mon 24-06-24 17:59:01, Roman Gushchin wrote:
> Rename memcg_oom_recover() into memcg1_oom_recover() for consistency
> with other memory cgroup v1-related functions.
> 
> Move the declaration in mm/memcontrol-v1.h to be nearby other
> memcg v1 oom handling functions.
> 
> Signed-off-by: Roman Gushchin <roman.gushchin@...ux.dev>

Acked-by: Michal Hocko <mhocko@...e.com>

> ---
>  mm/memcontrol-v1.c | 6 +++---
>  mm/memcontrol-v1.h | 2 +-
>  mm/memcontrol.c    | 6 +++---
>  3 files changed, 7 insertions(+), 7 deletions(-)
> 
> diff --git a/mm/memcontrol-v1.c b/mm/memcontrol-v1.c
> index 253d49d5fb12..1d5608ee1606 100644
> --- a/mm/memcontrol-v1.c
> +++ b/mm/memcontrol-v1.c
> @@ -1090,8 +1090,8 @@ static void __mem_cgroup_clear_mc(void)
>  
>  		mc.moved_swap = 0;
>  	}
> -	memcg_oom_recover(from);
> -	memcg_oom_recover(to);
> +	memcg1_oom_recover(from);
> +	memcg1_oom_recover(to);
>  	wake_up_all(&mc.waitq);
>  }
>  
> @@ -2067,7 +2067,7 @@ static int memcg_oom_wake_function(wait_queue_entry_t *wait,
>  	return autoremove_wake_function(wait, mode, sync, arg);
>  }
>  
> -void memcg_oom_recover(struct mem_cgroup *memcg)
> +void memcg1_oom_recover(struct mem_cgroup *memcg)
>  {
>  	/*
>  	 * For the following lockless ->under_oom test, the only required
> diff --git a/mm/memcontrol-v1.h b/mm/memcontrol-v1.h
> index 3de956b2422f..972c493a8ae3 100644
> --- a/mm/memcontrol-v1.h
> +++ b/mm/memcontrol-v1.h
> @@ -13,7 +13,6 @@ static inline void memcg1_soft_limit_reset(struct mem_cgroup *memcg)
>  
>  void mem_cgroup_charge_statistics(struct mem_cgroup *memcg, int nr_pages);
>  void memcg1_check_events(struct mem_cgroup *memcg, int nid);
> -void memcg_oom_recover(struct mem_cgroup *memcg);
>  int try_charge_memcg(struct mem_cgroup *memcg, gfp_t gfp_mask,
>  		     unsigned int nr_pages);
>  
> @@ -92,5 +91,6 @@ ssize_t memcg_write_event_control(struct kernfs_open_file *of,
>  
>  bool memcg1_oom_prepare(struct mem_cgroup *memcg, bool *locked);
>  void memcg1_oom_finish(struct mem_cgroup *memcg, bool locked);
> +void memcg1_oom_recover(struct mem_cgroup *memcg);
>  
>  #endif	/* __MM_MEMCONTROL_V1_H */
> diff --git a/mm/memcontrol.c b/mm/memcontrol.c
> index 8abd364ac837..37e0af5b26f3 100644
> --- a/mm/memcontrol.c
> +++ b/mm/memcontrol.c
> @@ -3167,7 +3167,7 @@ static int mem_cgroup_resize_max(struct mem_cgroup *memcg,
>  	} while (true);
>  
>  	if (!ret && enlarge)
> -		memcg_oom_recover(memcg);
> +		memcg1_oom_recover(memcg);
>  
>  	return ret;
>  }
> @@ -3752,7 +3752,7 @@ static int mem_cgroup_oom_control_write(struct cgroup_subsys_state *css,
>  
>  	WRITE_ONCE(memcg->oom_kill_disable, val);
>  	if (!val)
> -		memcg_oom_recover(memcg);
> +		memcg1_oom_recover(memcg);
>  
>  	return 0;
>  }
> @@ -5479,7 +5479,7 @@ static void uncharge_batch(const struct uncharge_gather *ug)
>  			page_counter_uncharge(&ug->memcg->memsw, ug->nr_memory);
>  		if (ug->nr_kmem)
>  			memcg_account_kmem(ug->memcg, -ug->nr_kmem);
> -		memcg_oom_recover(ug->memcg);
> +		memcg1_oom_recover(ug->memcg);
>  	}
>  
>  	local_irq_save(flags);
> -- 
> 2.45.2
> 

-- 
Michal Hocko
SUSE Labs