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Thu, 05 Mar 2026 23:59:30 -0800 (PST) From: Haifeng Xu To: akpm@linux-foundation.org, david@fromorbit.com, roman.gushchin@linux.dev Cc: zhengqi.arch@bytedance.com, muchun.song@linux.dev, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Haifeng Xu Subject: [PATCH 1/3] mm: shrinker: introduce new function get_shrinker_id() Date: Fri, 6 Mar 2026 15:57:54 +0800 Message-ID: <20260306075757.198887-2-haifeng.xu@shopee.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260306075757.198887-1-haifeng.xu@shopee.com> References: <20260306075757.198887-1-haifeng.xu@shopee.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Use get_shrinker_id() to retrieve the id of shrinker. No functional change. Signed-off-by: Haifeng Xu --- mm/shrinker.c | 17 +++++++++++++---- 1 file changed, 13 insertions(+), 4 deletions(-) diff --git a/mm/shrinker.c b/mm/shrinker.c index 7b61fc0ee78f..f0c6dfa026b0 100644 --- a/mm/shrinker.c +++ b/mm/shrinker.c @@ -193,6 +193,11 @@ static inline int calc_shrinker_id(int index, int offs= et) return index * SHRINKER_UNIT_BITS + offset; } =20 +static inline int get_shrinker_id(struct mem_cgroup *memcg, struct shrinke= r *shrinker) +{ + return shrinker->id; +} + void set_shrinker_bit(struct mem_cgroup *memcg, int nid, int shrinker_id) { if (shrinker_id >=3D 0 && memcg && !mem_cgroup_is_root(memcg)) { @@ -255,11 +260,13 @@ static long xchg_nr_deferred_memcg(int nid, struct sh= rinker *shrinker, struct shrinker_info *info; struct shrinker_info_unit *unit; long nr_deferred; + int id; =20 rcu_read_lock(); + id =3D get_shrinker_id(memcg, shrinker); info =3D rcu_dereference(memcg->nodeinfo[nid]->shrinker_info); - unit =3D info->unit[shrinker_id_to_index(shrinker->id)]; - nr_deferred =3D atomic_long_xchg(&unit->nr_deferred[shrinker_id_to_offset= (shrinker->id)], 0); + unit =3D info->unit[shrinker_id_to_index(id)]; + nr_deferred =3D atomic_long_xchg(&unit->nr_deferred[shrinker_id_to_offset= (id)], 0); rcu_read_unlock(); =20 return nr_deferred; @@ -271,12 +278,14 @@ static long add_nr_deferred_memcg(long nr, int nid, s= truct shrinker *shrinker, struct shrinker_info *info; struct shrinker_info_unit *unit; long nr_deferred; + int id; =20 rcu_read_lock(); + id =3D get_shrinker_id(memcg, shrinker); info =3D rcu_dereference(memcg->nodeinfo[nid]->shrinker_info); - unit =3D info->unit[shrinker_id_to_index(shrinker->id)]; + unit =3D info->unit[shrinker_id_to_index(id)]; nr_deferred =3D - atomic_long_add_return(nr, &unit->nr_deferred[shrinker_id_to_offset(shri= nker->id)]); + atomic_long_add_return(nr, &unit->nr_deferred[shrinker_id_to_offset(id)]= ); rcu_read_unlock(); =20 return nr_deferred; --=20 2.43.0