linux-kernel - Re: [PATCH v1 07/14] mm: memcg: rename memcg_check

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Date: Fri, 31 May 2024 23:39:39 -0700
From: Shakeel Butt <shakeel.butt@...ux.dev>
To: Roman Gushchin <roman.gushchin@...ux.dev>
Cc: Andrew Morton <akpm@...ux-foundation.org>, 
	Muchun Song <muchun.song@...ux.dev>, Johannes Weiner <hannes@...xchg.org>, 
	Michal Hocko <mhocko@...nel.org>, Matthew Wilcox <willy@...radead.org>, linux-mm@...ck.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 07/14] mm: memcg: rename memcg_check_events()

On Tue, May 28, 2024 at 01:20:59PM GMT, Roman Gushchin wrote:
> Rename memcg_check_events() into memcg1_check_events() for
> consistency with other cgroup v1-specific functions.
> 
> Signed-off-by: Roman Gushchin <roman.gushchin@...ux.dev>
> ---
>  mm/memcontrol-v1.c | 6 +++---
>  mm/memcontrol-v1.h | 2 +-
>  mm/memcontrol.c    | 8 ++++----
>  3 files changed, 8 insertions(+), 8 deletions(-)
> 
> diff --git a/mm/memcontrol-v1.c b/mm/memcontrol-v1.c
> index c47ffb6105931..8b8c2c9516349 100644
> --- a/mm/memcontrol-v1.c
> +++ b/mm/memcontrol-v1.c
> @@ -835,9 +835,9 @@ static int mem_cgroup_move_account(struct folio *folio,
>  
>  	local_irq_disable();
>  	mem_cgroup_charge_statistics(to, nr_pages);
> -	memcg_check_events(to, nid);
> +	memcg1_check_events(to, nid);
>  	mem_cgroup_charge_statistics(from, -nr_pages);
> -	memcg_check_events(from, nid);
> +	memcg1_check_events(from, nid);
>  	local_irq_enable();
>  out:
>  	return ret;
> @@ -1424,7 +1424,7 @@ static void mem_cgroup_threshold(struct mem_cgroup *memcg)
>   * Check events in order.
>   *
>   */
> -void memcg_check_events(struct mem_cgroup *memcg, int nid)
> +void memcg1_check_events(struct mem_cgroup *memcg, int nid)
>  {
>  	if (IS_ENABLED(CONFIG_PREEMPT_RT))
>  		return;
> diff --git a/mm/memcontrol-v1.h b/mm/memcontrol-v1.h
> index 524a2c76ffc97..ef1b7037cbdcc 100644
> --- a/mm/memcontrol-v1.h
> +++ b/mm/memcontrol-v1.h
> @@ -12,7 +12,7 @@ static inline void memcg1_soft_limit_reset(struct mem_cgroup *memcg)
>  }
>  
>  void mem_cgroup_charge_statistics(struct mem_cgroup *memcg, int nr_pages);
> -void memcg_check_events(struct mem_cgroup *memcg, int nid);
> +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);
> diff --git a/mm/memcontrol.c b/mm/memcontrol.c
> index 6bc9009bee517..c14b1b01bcf53 100644
> --- a/mm/memcontrol.c
> +++ b/mm/memcontrol.c
> @@ -2632,7 +2632,7 @@ void mem_cgroup_commit_charge(struct folio *folio, struct mem_cgroup *memcg)
>  

Once we have memcg->vmstats_v1_percpu field, we can move
mem_cgroup_charge_statistics() to v1 file and the following code blocks
can be abstracted out as well.

>  	local_irq_disable();
>  	mem_cgroup_charge_statistics(memcg, folio_nr_pages(folio));
> -	memcg_check_events(memcg, folio_nid(folio));
> +	memcg1_check_events(memcg, folio_nid(folio));
>  	local_irq_enable();
>  }
>  
> @@ -5699,7 +5699,7 @@ static void uncharge_batch(const struct uncharge_gather *ug)
>  	local_irq_save(flags);
>  	__count_memcg_events(ug->memcg, PGPGOUT, ug->pgpgout);
>  	__this_cpu_add(ug->memcg->vmstats_percpu->nr_page_events, ug->nr_memory);
> -	memcg_check_events(ug->memcg, ug->nid);
> +	memcg1_check_events(ug->memcg, ug->nid);
>  	local_irq_restore(flags);
>  
>  	/* drop reference from uncharge_folio */
> @@ -5839,7 +5839,7 @@ void mem_cgroup_replace_folio(struct folio *old, struct folio *new)
>  
>  	local_irq_save(flags);
>  	mem_cgroup_charge_statistics(memcg, nr_pages);
> -	memcg_check_events(memcg, folio_nid(new));
> +	memcg1_check_events(memcg, folio_nid(new));
>  	local_irq_restore(flags);
>  }
>  
> @@ -6106,7 +6106,7 @@ void mem_cgroup_swapout(struct folio *folio, swp_entry_t entry)
>  	memcg_stats_lock();
>  	mem_cgroup_charge_statistics(memcg, -nr_entries);
>  	memcg_stats_unlock();
> -	memcg_check_events(memcg, folio_nid(folio));
> +	memcg1_check_events(memcg, folio_nid(folio));
>  
>  	css_put(&memcg->css);
>  }
> -- 
> 2.45.1
>