From: Vlastimil Babka <vbabka@suse.cz>
To: Yang Shi <shy828301@gmail.com>,
guro@fb.com, ktkhai@virtuozzo.com, shakeelb@google.com,
david@fromorbit.com, hannes@cmpxchg.org, mhocko@suse.com,
akpm@linux-foundation.org
Cc: linux-mm@kvack.org, linux-fsdevel@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [v5 PATCH 02/11] mm: vmscan: consolidate shrinker_maps handling code
Date: Thu, 28 Jan 2021 17:10:05 +0100 [thread overview]
Message-ID: <4b0a6d22-e29b-fb85-b05f-b9f9f62ca8ea@suse.cz> (raw)
In-Reply-To: <20210127233345.339910-3-shy828301@gmail.com>
On 1/28/21 12:33 AM, Yang Shi wrote:
> The shrinker map management is not purely memcg specific, it is at the intersection
> between memory cgroup and shrinkers. It's allocation and assignment of a structure,
> and the only memcg bit is the map is being stored in a memcg structure. So move the
> shrinker_maps handling code into vmscan.c for tighter integration with shrinker code,
> and remove the "memcg_" prefix. There is no functional change.
>
> Signed-off-by: Yang Shi <shy828301@gmail.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Nits below:
> @@ -1581,10 +1581,10 @@ static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg)
> return false;
> }
>
> -extern int memcg_expand_shrinker_maps(int new_id);
> -
> -extern void memcg_set_shrinker_bit(struct mem_cgroup *memcg,
> - int nid, int shrinker_id);
> +extern int alloc_shrinker_maps(struct mem_cgroup *memcg);
> +extern void free_shrinker_maps(struct mem_cgroup *memcg);
> +extern void set_shrinker_bit(struct mem_cgroup *memcg,
> + int nid, int shrinker_id);
"extern" is unnecessary and people seem to be removing them nowadays when
touching the code
> /*
> * We allow subsystems to populate their shrinker-related
> * LRU lists before register_shrinker_prepared() is called
> @@ -212,7 +338,7 @@ static int prealloc_memcg_shrinker(struct shrinker *shrinker)
> goto unlock;
>
> if (id >= shrinker_nr_max) {
> - if (memcg_expand_shrinker_maps(id)) {
> + if (expand_shrinker_maps(id)) {
> idr_remove(&shrinker_idr, id);
> goto unlock;
> }
> @@ -601,7 +727,7 @@ static unsigned long shrink_slab_memcg(gfp_t gfp_mask, int nid,
Above this is a comment about barriers in memcg_set_shrinker_bit() that should
be updated.
> if (ret == SHRINK_EMPTY)
> ret = 0;
> else
> - memcg_set_shrinker_bit(memcg, nid, i);
> + set_shrinker_bit(memcg, nid, i);
> }
> freed += ret;
>
>
next prev parent reply other threads:[~2021-01-28 16:10 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-27 23:33 [v5 PATCH 0/11] Make shrinker's nr_deferred memcg aware Yang Shi
2021-01-27 23:33 ` [v5 PATCH 01/11] mm: vmscan: use nid from shrink_control for tracepoint Yang Shi
2021-01-28 16:02 ` Vlastimil Babka
2021-01-27 23:33 ` [v5 PATCH 02/11] mm: vmscan: consolidate shrinker_maps handling code Yang Shi
2021-01-28 16:10 ` Vlastimil Babka [this message]
2021-01-28 21:16 ` Yang Shi
2021-01-29 14:33 ` Kirill Tkhai
2021-01-29 17:11 ` Yang Shi
2021-01-27 23:33 ` [v5 PATCH 03/11] mm: vmscan: use shrinker_rwsem to protect shrinker_maps allocation Yang Shi
2021-01-28 16:19 ` Vlastimil Babka
2021-01-27 23:33 ` [v5 PATCH 04/11] mm: vmscan: remove memcg_shrinker_map_size Yang Shi
2021-01-28 16:53 ` Vlastimil Babka
2021-01-28 21:22 ` Yang Shi
2021-01-29 11:22 ` Vlastimil Babka
2021-01-29 17:05 ` Yang Shi
2021-01-27 23:33 ` [v5 PATCH 05/11] mm: memcontrol: rename shrinker_map to shrinker_info Yang Shi
2021-01-28 17:38 ` Vlastimil Babka
2021-01-28 22:05 ` Yang Shi
2021-01-27 23:33 ` [v5 PATCH 06/11] mm: vmscan: use a new flag to indicate shrinker is registered Yang Shi
2021-01-28 17:56 ` Vlastimil Babka
2021-01-28 23:47 ` Yang Shi
2021-01-27 23:33 ` [v5 PATCH 07/11] mm: vmscan: add per memcg shrinker nr_deferred Yang Shi
2021-01-29 13:00 ` Vlastimil Babka
2021-01-29 14:46 ` Kirill Tkhai
2021-01-29 17:20 ` Yang Shi
2021-01-29 18:04 ` Yang Shi
2021-02-01 15:17 ` Vlastimil Babka
2021-02-01 17:09 ` Yang Shi
2021-01-27 23:33 ` [v5 PATCH 08/11] mm: vmscan: use per memcg nr_deferred of shrinker Yang Shi
2021-01-29 14:55 ` Kirill Tkhai
2021-01-29 14:59 ` Kirill Tkhai
2021-01-29 17:22 ` Yang Shi
2021-01-29 15:13 ` Vlastimil Babka
2021-01-29 17:33 ` Yang Shi
2021-01-27 23:33 ` [v5 PATCH 09/11] mm: vmscan: don't need allocate shrinker->nr_deferred for memcg aware shrinkers Yang Shi
2021-01-29 15:40 ` Vlastimil Babka
2021-01-29 17:34 ` Yang Shi
2021-01-27 23:33 ` [v5 PATCH 10/11] mm: memcontrol: reparent nr_deferred when memcg offline Yang Shi
2021-01-29 15:52 ` Vlastimil Babka
2021-01-29 17:38 ` Yang Shi
2021-01-27 23:33 ` [v5 PATCH 11/11] mm: vmscan: shrink deferred objects proportional to priority Yang Shi
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