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[73.93.239.127]) by smtp.gmail.com with ESMTPSA id fw12sm244233pjb.43.2021.01.05.14.58.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 05 Jan 2021 14:58:56 -0800 (PST) From: Yang Shi To: guro@fb.com, ktkhai@virtuozzo.com, shakeelb@google.com, david@fromorbit.com, hannes@cmpxchg.org, mhocko@suse.com, akpm@linux-foundation.org Cc: shy828301@gmail.com, linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [v3 PATCH 06/11] mm: memcontrol: rename shrinker_map to shrinker_info Date: Tue, 5 Jan 2021 14:58:12 -0800 Message-Id: <20210105225817.1036378-7-shy828301@gmail.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20210105225817.1036378-1-shy828301@gmail.com> References: <20210105225817.1036378-1-shy828301@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The following patch is going to add nr_deferred into shrinker_map, the change will make shrinker_map not only include map anymore, so rename it to a more general name. And this should make the patch adding nr_deferred cleaner and readable and make review easier. Signed-off-by: Yang Shi --- include/linux/memcontrol.h | 8 ++--- mm/memcontrol.c | 6 ++-- mm/vmscan.c | 66 +++++++++++++++++++------------------- 3 files changed, 40 insertions(+), 40 deletions(-) diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h index d128d2842f22..e05bbe8277cc 100644 --- a/include/linux/memcontrol.h +++ b/include/linux/memcontrol.h @@ -96,7 +96,7 @@ struct lruvec_stat { * Bitmap of shrinker::id corresponding to memcg-aware shrinkers, * which have elements charged to this memcg. */ -struct memcg_shrinker_map { +struct memcg_shrinker_info { struct rcu_head rcu; unsigned long map[]; }; @@ -118,7 +118,7 @@ struct mem_cgroup_per_node { struct mem_cgroup_reclaim_iter iter; - struct memcg_shrinker_map __rcu *shrinker_map; + struct memcg_shrinker_info __rcu *shrinker_info; struct rb_node tree_node; /* RB tree node */ unsigned long usage_in_excess;/* Set to the value by which */ @@ -1581,8 +1581,8 @@ static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg) return false; } -extern int memcg_alloc_shrinker_maps(struct mem_cgroup *memcg); -extern void memcg_free_shrinker_maps(struct mem_cgroup *memcg); +extern int memcg_alloc_shrinker_info(struct mem_cgroup *memcg); +extern void memcg_free_shrinker_info(struct mem_cgroup *memcg); extern void memcg_set_shrinker_bit(struct mem_cgroup *memcg, int nid, int shrinker_id); #else diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 817dde366258..126f1fd550c8 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -5248,11 +5248,11 @@ static int mem_cgroup_css_online(struct cgroup_subsys_state *css) struct mem_cgroup *memcg = mem_cgroup_from_css(css); /* - * A memcg must be visible for memcg_expand_shrinker_maps() + * A memcg must be visible for memcg_expand_shrinker_info() * by the time the maps are allocated. So, we allocate maps * here, when for_each_mem_cgroup() can't skip it. */ - if (memcg_alloc_shrinker_maps(memcg)) { + if (memcg_alloc_shrinker_info(memcg)) { mem_cgroup_id_remove(memcg); return -ENOMEM; } @@ -5316,7 +5316,7 @@ static void mem_cgroup_css_free(struct cgroup_subsys_state *css) vmpressure_cleanup(&memcg->vmpressure); cancel_work_sync(&memcg->high_work); mem_cgroup_remove_from_trees(memcg); - memcg_free_shrinker_maps(memcg); + memcg_free_shrinker_info(memcg); memcg_free_kmem(memcg); mem_cgroup_free(memcg); } diff --git a/mm/vmscan.c b/mm/vmscan.c index 9761c7c27412..0033659abf9e 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -187,20 +187,20 @@ static DECLARE_RWSEM(shrinker_rwsem); #ifdef CONFIG_MEMCG static int shrinker_nr_max; -static void memcg_free_shrinker_map_rcu(struct rcu_head *head) +static void memcg_free_shrinker_info_rcu(struct rcu_head *head) { - kvfree(container_of(head, struct memcg_shrinker_map, rcu)); + kvfree(container_of(head, struct memcg_shrinker_info, rcu)); } -static int memcg_expand_one_shrinker_map(struct mem_cgroup *memcg, - int size, int old_size) +static int memcg_expand_one_shrinker_info(struct mem_cgroup *memcg, + int size, int old_size) { - struct memcg_shrinker_map *new, *old; + struct memcg_shrinker_info *new, *old; int nid; for_each_node(nid) { old = rcu_dereference_protected( - mem_cgroup_nodeinfo(memcg, nid)->shrinker_map, true); + mem_cgroup_nodeinfo(memcg, nid)->shrinker_info, true); /* Not yet online memcg */ if (!old) return 0; @@ -213,17 +213,17 @@ static int memcg_expand_one_shrinker_map(struct mem_cgroup *memcg, memset(new->map, (int)0xff, old_size); memset((void *)new->map + old_size, 0, size - old_size); - rcu_assign_pointer(memcg->nodeinfo[nid]->shrinker_map, new); - call_rcu(&old->rcu, memcg_free_shrinker_map_rcu); + rcu_assign_pointer(memcg->nodeinfo[nid]->shrinker_info, new); + call_rcu(&old->rcu, memcg_free_shrinker_info_rcu); } return 0; } -void memcg_free_shrinker_maps(struct mem_cgroup *memcg) +void memcg_free_shrinker_info(struct mem_cgroup *memcg) { struct mem_cgroup_per_node *pn; - struct memcg_shrinker_map *map; + struct memcg_shrinker_info *info; int nid; if (mem_cgroup_is_root(memcg)) @@ -231,16 +231,16 @@ void memcg_free_shrinker_maps(struct mem_cgroup *memcg) for_each_node(nid) { pn = mem_cgroup_nodeinfo(memcg, nid); - map = rcu_dereference_protected(pn->shrinker_map, true); - if (map) - kvfree(map); - rcu_assign_pointer(pn->shrinker_map, NULL); + info = rcu_dereference_protected(pn->shrinker_info, true); + if (info) + kvfree(info); + rcu_assign_pointer(pn->shrinker_info, NULL); } } -int memcg_alloc_shrinker_maps(struct mem_cgroup *memcg) +int memcg_alloc_shrinker_info(struct mem_cgroup *memcg) { - struct memcg_shrinker_map *map; + struct memcg_shrinker_info *info; int nid, size, ret = 0; if (mem_cgroup_is_root(memcg)) @@ -249,20 +249,20 @@ int memcg_alloc_shrinker_maps(struct mem_cgroup *memcg) down_read(&shrinker_rwsem); size = DIV_ROUND_UP(shrinker_nr_max, BITS_PER_LONG) * sizeof(unsigned long); for_each_node(nid) { - map = kvzalloc(sizeof(*map) + size, GFP_KERNEL); - if (!map) { - memcg_free_shrinker_maps(memcg); + info = kvzalloc(sizeof(*info) + size, GFP_KERNEL); + if (!info) { + memcg_free_shrinker_info(memcg); ret = -ENOMEM; break; } - rcu_assign_pointer(memcg->nodeinfo[nid]->shrinker_map, map); + rcu_assign_pointer(memcg->nodeinfo[nid]->shrinker_info, info); } up_read(&shrinker_rwsem); return ret; } -static int memcg_expand_shrinker_maps(int new_id) +static int memcg_expand_shrinker_info(int new_id) { int size, old_size, ret = 0; struct mem_cgroup *memcg; @@ -279,7 +279,7 @@ static int memcg_expand_shrinker_maps(int new_id) do { if (mem_cgroup_is_root(memcg)) continue; - ret = memcg_expand_one_shrinker_map(memcg, size, old_size); + ret = memcg_expand_one_shrinker_info(memcg, size, old_size); if (ret) { mem_cgroup_iter_break(NULL, memcg); goto out; @@ -293,13 +293,13 @@ static int memcg_expand_shrinker_maps(int new_id) void memcg_set_shrinker_bit(struct mem_cgroup *memcg, int nid, int shrinker_id) { if (shrinker_id >= 0 && memcg && !mem_cgroup_is_root(memcg)) { - struct memcg_shrinker_map *map; + struct memcg_shrinker_info *info; rcu_read_lock(); - map = rcu_dereference(memcg->nodeinfo[nid]->shrinker_map); + info = rcu_dereference(memcg->nodeinfo[nid]->shrinker_info); /* Pairs with smp mb in shrink_slab() */ smp_mb__before_atomic(); - set_bit(shrinker_id, map->map); + set_bit(shrinker_id, info->map); rcu_read_unlock(); } } @@ -330,7 +330,7 @@ static int prealloc_memcg_shrinker(struct shrinker *shrinker) goto unlock; if (id >= shrinker_nr_max) { - if (memcg_expand_shrinker_maps(id)) { + if (memcg_expand_shrinker_info(id)) { idr_remove(&shrinker_idr, id); goto unlock; } @@ -666,7 +666,7 @@ static unsigned long do_shrink_slab(struct shrink_control *shrinkctl, static unsigned long shrink_slab_memcg(gfp_t gfp_mask, int nid, struct mem_cgroup *memcg, int priority) { - struct memcg_shrinker_map *map; + struct memcg_shrinker_info *info; unsigned long ret, freed = 0; int i; @@ -676,12 +676,12 @@ static unsigned long shrink_slab_memcg(gfp_t gfp_mask, int nid, if (!down_read_trylock(&shrinker_rwsem)) return 0; - map = rcu_dereference_protected(memcg->nodeinfo[nid]->shrinker_map, - true); - if (unlikely(!map)) + info = rcu_dereference_protected(memcg->nodeinfo[nid]->shrinker_info, + true); + if (unlikely(!info)) goto unlock; - for_each_set_bit(i, map->map, shrinker_nr_max) { + for_each_set_bit(i, info->map, shrinker_nr_max) { struct shrink_control sc = { .gfp_mask = gfp_mask, .nid = nid, @@ -692,7 +692,7 @@ static unsigned long shrink_slab_memcg(gfp_t gfp_mask, int nid, shrinker = idr_find(&shrinker_idr, i); if (unlikely(!shrinker || shrinker == SHRINKER_REGISTERING)) { if (!shrinker) - clear_bit(i, map->map); + clear_bit(i, info->map); continue; } @@ -703,7 +703,7 @@ static unsigned long shrink_slab_memcg(gfp_t gfp_mask, int nid, ret = do_shrink_slab(&sc, shrinker, priority); if (ret == SHRINK_EMPTY) { - clear_bit(i, map->map); + clear_bit(i, info->map); /* * After the shrinker reported that it had no objects to * free, but before we cleared the corresponding bit in -- 2.26.2