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Tue, 22 Apr 2025 04:22:16 -0700 (PDT) From: xu xin X-Google-Original-From: xu xin To: xu.xin16@zte.com.cn Cc: akpm@linux-foundation.org, david@redhat.com, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, wang.yaxin@zte.com.cn, yang.yang29@zte.com.cn Subject: [PATCH RESEND 5/6] memcontrol-v1: add ksm_merging_pages in cgroup/memory.ksm_stat Date: Tue, 22 Apr 2025 11:22:12 +0000 Message-Id: <20250422112212.3231548-1-xu.xin16@zte.com.cn> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20250422191407770210-193JBD0Fgeu5zqE2K@zte.com.cn> References: <20250422191407770210-193JBD0Fgeu5zqE2K@zte.com.cn> 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" Users can obtain ksm_merging_pages of a cgroup just by: / # cat /sys/fs/cgroup/memory.ksm_stat ksm_rmap_items 76800 ksm_zero_pages 0 ksm_merging_pages 1092 Current implementation supports cgroup v1 temporarily; cgroup v2 compatibility is planned for future versions. Signed-off-by: xu xin --- mm/memcontrol-v1.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/mm/memcontrol-v1.c b/mm/memcontrol-v1.c index 9680749f4eef..7ee38d633d85 100644 --- a/mm/memcontrol-v1.c +++ b/mm/memcontrol-v1.c @@ -1826,6 +1826,7 @@ static int memcg_numa_stat_show(struct seq_file *m, v= oid *v) struct memcg_ksm_stat { unsigned long ksm_rmap_items; long ksm_zero_pages; + unsigned long ksm_merging_pages; }; =20 static int evaluate_memcg_ksm_stat(struct task_struct *task, void *arg) @@ -1837,6 +1838,7 @@ static int evaluate_memcg_ksm_stat(struct task_struct= *task, void *arg) if (mm) { ksm_stat->ksm_rmap_items +=3D mm->ksm_rmap_items; ksm_stat->ksm_zero_pages +=3D mm_ksm_zero_pages(mm); + ksm_stat->ksm_merging_pages +=3D mm->ksm_merging_pages; mmput(mm); } =20 @@ -1851,12 +1853,14 @@ static int memcg_ksm_stat_show(struct seq_file *m, = void *v) /* Initialization */ ksm_stat.ksm_rmap_items =3D 0; ksm_stat.ksm_zero_pages =3D 0; + ksm_stat.ksm_merging_pages =3D 0; =20 /* summing all processes'ksm statistic items of this cgroup hierarchy */ mem_cgroup_scan_tasks(memcg, evaluate_memcg_ksm_stat, &ksm_stat); =20 seq_printf(m, "ksm_rmap_items %lu\n", ksm_stat.ksm_rmap_items); seq_printf(m, "ksm_zero_pages %ld\n", ksm_stat.ksm_zero_pages); + seq_printf(m, "ksm_merging_pages %ld\n", ksm_stat.ksm_merging_pages); =20 return 0; } --=20 2.39.3