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Thu, 6 Jul 2023 16:52:52 +0800 From: Nanyong Sun To: CC: , , , , , Subject: [PATCH] mm/ksm: prepare to remove the redundant ksm_merging_pages in procfs Date: Thu, 6 Jul 2023 17:49:17 +0800 Message-ID: <20230706094917.588213-1-sunnanyong@huawei.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-Originating-IP: [10.175.113.32] X-ClientProxiedBy: dggems704-chm.china.huawei.com (10.3.19.181) To kwepemm600003.china.huawei.com (7.193.23.202) X-CFilter-Loop: Reflected X-Rspam-User: X-Stat-Signature: aabnj6ij99hsybth78fzbqk1t7ikkyju X-Rspamd-Server: rspam07 X-Rspamd-Queue-Id: AF27B16001A X-HE-Tag: 1688633577-289529 X-HE-Meta: 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 RDxYcryE Dqrq6E9Zg/EAur/nQoZLqsBI0nyRHAIY5pbtu4FD6Wv6IcyN5mfKmF8dIS5JvqjD2YPlnqGFSDaJtGRyHs67GXFItEiiYvstrtaWqSjiQx+EjZrWmrC3EjlnNwQzr0Qn3kSd8VELSny+Tiolq8KaH0+4+XxQvdnwVl/zypeftl6/bgyqcdyWGF04WuPPwuCVBwYUB X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Since the ksm_merging_pages information already included in /proc//ksm_stat, we could remove /proc//ksm_merging_pages to make the directory more clean, and can save a little bit resources. To delete this interface more smoothly and avoid userspace break, retain this interface temporarily and modify its function to hint users to use ksm_stat instead. Signed-off-by: Nanyong Sun --- fs/proc/base.c | 9 +-------- 1 file changed, 1 insertion(+), 8 deletions(-) diff --git a/fs/proc/base.c b/fs/proc/base.c index eb2e498e3b8d..d080c58cbe6c 100644 --- a/fs/proc/base.c +++ b/fs/proc/base.c @@ -3189,14 +3189,7 @@ static int proc_pid_patch_state(struct seq_file *m, struct pid_namespace *ns, static int proc_pid_ksm_merging_pages(struct seq_file *m, struct pid_namespace *ns, struct pid *pid, struct task_struct *task) { - struct mm_struct *mm; - - mm = get_task_mm(task); - if (mm) { - seq_printf(m, "%lu\n", mm->ksm_merging_pages); - mmput(mm); - } - + seq_puts(m, "please use /proc//ksm_stat instead\n"); return 0; } static int proc_pid_ksm_stat(struct seq_file *m, struct pid_namespace *ns,