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Fri, 04 Sep 2026 08:30:38 +0000 X-Mizu-Trace-ID: eb80e7cdd3dd87ca X-Migadu-Flow: FLOW_OUT From: Ye Liu To: Andrew Morton , David Hildenbrand Cc: Ye Liu , Xu Xin , Chengming Zhou , linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: [PATCH 3/8] mm/ksm: convert process iterator to for_each_process_rcu Date: Fri, 4 Sep 2026 16:29:55 +0800 Message-Id: <20260904083001.553587-4-ye.liu@linux.dev> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20260904083001.553587-1-ye.liu@linux.dev> References: <20260904083001.553587-1-ye.liu@linux.dev> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: 20EAA40006 X-Stat-Signature: 1s3z8hnynsyi4h3eb7qbqy1n4orxy5ok X-HE-Tag: 1788510639-378336 X-HE-Meta: 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 Opc0XqUA STN5+evyk5PslQ6VBE4BBrwomlDZrDD23idTwkrrOzCOebdKQ+RrxR0Py1PgfMgKoYvaeB0ATU96j2ONCRlV9BxWtJ+TDCx3qSD2niMIQ/cH292EGVcD7a58klAblfUC+EMASSZf2RfdIyioHJ4gpnwAGwAX7akSLadYRgGVEwR4g4fotn24GRrz6JMOjH4w9qdK0S6fJVHY1S1QmYIA9mEnfuH9B2f7gpmQG6+m8au9NgyVvqmYi7RuIeWp2HWOwYqB5QNXWgcefeeTPqEOEtf/88A== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: From: Ye Liu Replace the manual rcu_read_lock()/rcu_read_unlock() pair combined with for_each_process() loop in mm/ksm.c with for_each_process_rcu(). No functional change. Signed-off-by: Ye Liu --- mm/ksm.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/mm/ksm.c b/mm/ksm.c index 49d48d1e0998..fa5e4c47fb1b 100644 --- a/mm/ksm.c +++ b/mm/ksm.c @@ -3280,8 +3280,7 @@ void collect_procs_ksm(const struct folio *folio, const struct page *page, struct anon_vma *av = rmap_item->anon_vma; anon_vma_lock_read(av); - rcu_read_lock(); - for_each_process(tsk) { + for_each_process_rcu(tsk) { struct anon_vma_chain *vmac; const unsigned long addr = rmap_item->address & PAGE_MASK; const unsigned long index = rmap_item->linear_page_index; @@ -3298,7 +3297,6 @@ void collect_procs_ksm(const struct folio *folio, const struct page *page, } } } - rcu_read_unlock(); anon_vma_unlock_read(av); } } -- 2.25.1