From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mta1.migadu.com (out-48.mta1.migadu.com [95.215.58.48]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id CB3383C37A2 for ; Fri, 4 Sep 2026 08:30:40 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=95.215.58.48 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788510642; cv=none; b=rRXnC1Jo9qMrmrvi4t7NhfJKE9yh9IC8Dsh7HY+5DFuC9FbX7dIVEtpEDWZQBn136x10tDUv96azyH4yjpweqvHv7ZN9iexiXeStWbYiwhxSHTTxenVA9FdoF2Gw2pcQICLkb8EhcY6K0VgidgUEHhPG9TMn8+TRXRcbi3LoBoE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788510642; c=relaxed/simple; bh=JamvyTb3oE6oY9RFFl9Xgqmjsm7Tu8R7P/y1cNok9Qc=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=HI0QQYyLIHVZWqaZQTOvx0hv8qS71piDqsjvcHyOmIOQXL8UEFmrGmGQkhrWtG030NU1K58cWn3rYNoSjvVpz7gDseNDEEyJVVi3WzvuYCZbCPUlWniB0NUfnWw6frYAL/ZGYE/+Sf1usdfA7umLVwqoWMTsb+HNQ8Q+HbABMaw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=SsjtsYTS; arc=none smtp.client-ip=95.215.58.48 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="SsjtsYTS" X-Envelope-To: linux-kernel@vger.kernel.org DKIM-Signature: a=rsa-sha256; bh=JamvyTb3oE6oY9RFFl9Xgqmjsm7Tu8R7P/y1cNok9Qc=; c=simple/simple; d=linux.dev; h=from:to:subject:date:message-id:mime-version:content-type; s=key1; t=1788510638; v=1; x=1789115438; b=SsjtsYTSVR5JEdUoweSC86iS4Oj6ynzXNNii7sFtAurZ3kW+vyytR3HWqB2May7cjfE/lRMB V1JTKNLve9p2WDhbFwSq/4tIseLOXzO34DHBNAtjVbXT0VJXNS32auLyvF8XVqTXQkbFSO615h9 iPynoU9GbI3y/03p4SPktRGU= X-Envelope-To: linux-kernel@vger.kernel.org Received: by smtp.migadu.com with ESMTPS id eb80e7cdd3dd87ca; 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> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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