From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 7E9EAC79FB7 for ; Wed, 9 Sep 2026 16:12:22 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 56C936B008C; Wed, 9 Sep 2026 12:12:21 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 51D196B0093; Wed, 9 Sep 2026 12:12:21 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 3E5746B0096; Wed, 9 Sep 2026 12:12:21 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0016.hostedemail.com [216.40.44.16]) by kanga.kvack.org (Postfix) with ESMTP id 03D6E6B008C for ; Wed, 9 Sep 2026 12:12:20 -0400 (EDT) Received: from smtpin30.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay08.hostedemail.com (Postfix) with ESMTP id 7A66D14029D for ; Wed, 9 Sep 2026 16:12:20 +0000 (UTC) X-FDA: 85194716040.30.7D28A24 Received: from tor.source.kernel.org (tor.source.kernel.org [172.105.4.254]) by imf22.hostedemail.com (Postfix) with ESMTP id B7992C000E for ; Wed, 9 Sep 2026 16:12:18 +0000 (UTC) Authentication-Results: imf22.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=nyx0WwC8; spf=pass (imf22.hostedemail.com: domain of david@kernel.org designates 172.105.4.254 as permitted sender) smtp.mailfrom=david@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1788970338; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=/HRifwmxeGvJe7kJs7f3I4hA30d5I/e+qt2AvENBJgw=; b=z4zy55a18U3SF2PmjivY0cTkj1K330Sq3XOocd4+895i57dhVONpe0n+gRR+Fdjw6ayfyt PDqNwww/sbOGFrDXetjl17F1QoU4DTpIQe0Yy9l1RLqD/Uc87BSZlrpz+ZJrvAoyqB5l6K TE1C3cIKb5pY/JjhwbF87if3MKVnYKM= ARC-Authentication-Results: i=1; imf22.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=nyx0WwC8; spf=pass (imf22.hostedemail.com: domain of david@kernel.org designates 172.105.4.254 as permitted sender) smtp.mailfrom=david@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org ARC-Seal: i=1; a=rsa-sha256; d=hostedemail.com; s=arc-20220608; cv=none; t=1788970338; b=HM7EakkcUKCUaVeUM0RIt+9fCDKgDA47La9SJkJH/3p1c9d60sA/k2UY5GSjdKBPlE+2xZ nKsIEOovPaO4JP1OgXRSxAwtK0SO/XQ6JBcpuL77nyMeKdXt3HC5hYGbIbrm55qWKsPvac JkjTyNV5IRsRrKj42V0lehs0/UYWK24= Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by tor.source.kernel.org (Postfix) with ESMTP id 1FD83600CB; Wed, 9 Sep 2026 16:12:18 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 87A0E1F00A3A; Wed, 9 Sep 2026 16:12:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1788970337; bh=/HRifwmxeGvJe7kJs7f3I4hA30d5I/e+qt2AvENBJgw=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=nyx0WwC8UXgF34bKIGpOOMilC7CTqwRb74EUJPBwOD8zVZaOP/m+QoC1+1+QXBLt/ lTsBx6bAauoPLpTk4fvWWqGcLUFKrCg3CpY6RAd19V9JrL7mIL4Cc94wFPLTDfWLGO lM/HydDSpOuuvNg6yX+FAHvfctaOsCOHCoLvs4xsWL8ydpc+CwzOAtBisx9yiDwZQM /gNhRtIjpTbpgSN0MSdZpBFB8iIKswgR34L4IFdqxhL2p0oROblebe5FgYhaFL/oO+ ucJkyiVhZEOCzUcRGPLScUmvvJNGbpK5ozMotdNNzdvV/Vz4Gp4d54lmqJKrlJR+nW WLBFC+AEdIHMg== Message-ID: <5c856f40-35ef-49f1-9ecd-4266891bc0a3@kernel.org> Date: Wed, 9 Sep 2026 18:11:58 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 3/8] mm/ksm: convert process iterator to for_each_process_rculock To: Ye Liu , Andrew Morton Cc: Ye Liu , Michal Hocko , SJ Park , peterz@infradead.org, paulmck@kernel.org, mingo@redhat.com, rostedt@goodmis.org, jpoimboe@kernel.org, mic@digikod.net, oleg@redhat.com, tglx@kernel.org, linmiaohe@huawei.com, nao.horiguchi@gmail.com, rafael@kernel.org, gnoack3000@gmail.com, ljs@kernel.org, rientjes@google.com, shakeel.butt@linux.dev, xu.xin16@zte.com.cn, chengming.zhou@linux.dev, will@kernel.org, boqun@kernel.org, frederic@kernel.org, neeraj.upadhyay@kernel.org, joelagnelf@nvidia.com, josh@joshtriplett.org, urezki@gmail.com, juri.lelli@redhat.com, vincent.guittot@linaro.org, tony.luck@intel.com, reinette.chatre@intel.com, x86@kernel.org, paul@paul-moore.com, jmorris@namei.org, serge@hallyn.com, pavel@kernel.org, lance.yang@linux.dev, mhiramat@kernel.org, pmladek@suse.com, longman@redhat.com, mathieu.desnoyers@efficios.com, jiangshanlai@gmail.com, qiang.zhang@linux.dev, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, vschneid@redhat.com, kprateek.nayak@amd.com, mark.rutland@arm.com, Dave.Martin@arm.com, james.morse@arm.com, babu.moger@amd.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, rcu@vger.kernel.org, linux-trace-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-security-module@vger.kernel.org References: <20260907081334.1152889-1-ye.liu@linux.dev> <20260907081334.1152889-4-ye.liu@linux.dev> From: "David Hildenbrand (Arm)" Content-Language: en-US Autocrypt: addr=david@kernel.org; keydata= xsFNBFXLn5EBEAC+zYvAFJxCBY9Tr1xZgcESmxVNI/0ffzE/ZQOiHJl6mGkmA1R7/uUpiCjJ dBrn+lhhOYjjNefFQou6478faXE6o2AhmebqT4KiQoUQFV4R7y1KMEKoSyy8hQaK1umALTdL QZLQMzNE74ap+GDK0wnacPQFpcG1AE9RMq3aeErY5tujekBS32jfC/7AnH7I0v1v1TbbK3Gp XNeiN4QroO+5qaSr0ID2sz5jtBLRb15RMre27E1ImpaIv2Jw8NJgW0k/D1RyKCwaTsgRdwuK Kx/Y91XuSBdz0uOyU/S8kM1+ag0wvsGlpBVxRR/xw/E8M7TEwuCZQArqqTCmkG6HGcXFT0V9 PXFNNgV5jXMQRwU0O/ztJIQqsE5LsUomE//bLwzj9IVsaQpKDqW6TAPjcdBDPLHvriq7kGjt WhVhdl0qEYB8lkBEU7V2Yb+SYhmhpDrti9Fq1EsmhiHSkxJcGREoMK/63r9WLZYI3+4W2rAc UucZa4OT27U5ZISjNg3Ev0rxU5UH2/pT4wJCfxwocmqaRr6UYmrtZmND89X0KigoFD/XSeVv jwBRNjPAubK9/k5NoRrYqztM9W6sJqrH8+UWZ1Idd/DdmogJh0gNC0+N42Za9yBRURfIdKSb B3JfpUqcWwE7vUaYrHG1nw54pLUoPG6sAA7Mehl3nd4pZUALHwARAQABzS5EYXZpZCBIaWxk ZW5icmFuZCAoQ3VycmVudCkgPGRhdmlkQGtlcm5lbC5vcmc+wsGQBBMBCAA6AhsDBQkmWAik AgsJBBUKCQgCFgICHgUCF4AWIQQb2cqtc1xMOkYN/MpN3hD3AP+DWgUCaYJt/AIZAQAKCRBN 3hD3AP+DWriiD/9BLGEKG+N8L2AXhikJg6YmXom9ytRwPqDgpHpVg2xdhopoWdMRXjzOrIKD g4LSnFaKneQD0hZhoArEeamG5tyo32xoRsPwkbpIzL0OKSZ8G6mVbFGpjmyDLQCAxteXCLXz ZI0VbsuJKelYnKcXWOIndOrNRvE5eoOfTt2XfBnAapxMYY2IsV+qaUXlO63GgfIOg8RBaj7x 3NxkI3rV0SHhI4GU9K6jCvGghxeS1QX6L/XI9mfAYaIwGy5B68kF26piAVYv/QZDEVIpo3t7 /fjSpxKT8plJH6rhhR0epy8dWRHk3qT5tk2P85twasdloWtkMZ7FsCJRKWscm1BLpsDn6EQ4 jeMHECiY9kGKKi8dQpv3FRyo2QApZ49NNDbwcR0ZndK0XFo15iH708H5Qja/8TuXCwnPWAcJ DQoNIDFyaxe26Rx3ZwUkRALa3iPcVjE0//TrQ4KnFf+lMBSrS33xDDBfevW9+Dk6IISmDH1R HFq2jpkN+FX/PE8eVhV68B2DsAPZ5rUwyCKUXPTJ/irrCCmAAb5Jpv11S7hUSpqtM/6oVESC 3z/7CzrVtRODzLtNgV4r5EI+wAv/3PgJLlMwgJM90Fb3CB2IgbxhjvmB1WNdvXACVydx55V7 LPPKodSTF29rlnQAf9HLgCphuuSrrPn5VQDaYZl4N/7zc2wcWM7BTQRVy5+RARAA59fefSDR 9nMGCb9LbMX+TFAoIQo/wgP5XPyzLYakO+94GrgfZjfhdaxPXMsl2+o8jhp/hlIzG56taNdt VZtPp3ih1AgbR8rHgXw1xwOpuAd5lE1qNd54ndHuADO9a9A0vPimIes78Hi1/yy+ZEEvRkHk /kDa6F3AtTc1m4rbbOk2fiKzzsE9YXweFjQvl9p+AMw6qd/iC4lUk9g0+FQXNdRs+o4o6Qvy iOQJfGQ4UcBuOy1IrkJrd8qq5jet1fcM2j4QvsW8CLDWZS1L7kZ5gT5EycMKxUWb8LuRjxzZ 3QY1aQH2kkzn6acigU3HLtgFyV1gBNV44ehjgvJpRY2cC8VhanTx0dZ9mj1YKIky5N+C0f21 zvntBqcxV0+3p8MrxRRcgEtDZNav+xAoT3G0W4SahAaUTWXpsZoOecwtxi74CyneQNPTDjNg azHmvpdBVEfj7k3p4dmJp5i0U66Onmf6mMFpArvBRSMOKU9DlAzMi4IvhiNWjKVaIE2Se9BY FdKVAJaZq85P2y20ZBd08ILnKcj7XKZkLU5FkoA0udEBvQ0f9QLNyyy3DZMCQWcwRuj1m73D sq8DEFBdZ5eEkj1dCyx+t/ga6x2rHyc8Sl86oK1tvAkwBNsfKou3v+jP/l14a7DGBvrmlYjO 59o3t6inu6H7pt7OL6u6BQj7DoMAEQEAAcLBfAQYAQgAJgIbDBYhBBvZyq1zXEw6Rg38yk3e EPcA/4NaBQJonNqrBQkmWAihAAoJEE3eEPcA/4NaKtMQALAJ8PzprBEXbXcEXwDKQu+P/vts IfUb1UNMfMV76BicGa5NCZnJNQASDP/+bFg6O3gx5NbhHHPeaWz/VxlOmYHokHodOvtL0WCC 8A5PEP8tOk6029Z+J+xUcMrJClNVFpzVvOpb1lCbhjwAV465Hy+NUSbbUiRxdzNQtLtgZzOV Zw7jxUCs4UUZLQTCuBpFgb15bBxYZ/BL9MbzxPxvfUQIPbnzQMcqtpUs21CMK2PdfCh5c4gS sDci6D5/ZIBw94UQWmGpM/O1ilGXde2ZzzGYl64glmccD8e87OnEgKnH3FbnJnT4iJchtSvx yJNi1+t0+qDti4m88+/9IuPqCKb6Stl+s2dnLtJNrjXBGJtsQG/sRpqsJz5x1/2nPJSRMsx9 5YfqbdrJSOFXDzZ8/r82HgQEtUvlSXNaXCa95ez0UkOG7+bDm2b3s0XahBQeLVCH0mw3RAQg r7xDAYKIrAwfHHmMTnBQDPJwVqxJjVNr7yBic4yfzVWGCGNE4DnOW0vcIeoyhy9vnIa3w1uZ 3iyY2Nsd7JxfKu1PRhCGwXzRw5TlfEsoRI7V9A8isUCoqE2Dzh3FvYHVeX4Us+bRL/oqareJ CIFqgYMyvHj7Q06kTKmauOe4Nf0l0qEkIuIzfoLJ3qr5UyXc2hLtWyT9Ir+lYlX9efqh7mOY qIws/H2t In-Reply-To: <20260907081334.1152889-4-ye.liu@linux.dev> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: B7992C000E X-Stat-Signature: tt5zffyb8df43kynbfaxywhbo5jm35c4 X-Rspam-User: X-HE-Tag: 1788970338-750598 X-HE-Meta: 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 2fQu7/yd /7x49zuobxW2Cq2gleT+mTjmAo4mz6/H649VCD3Gfhsh6N4a7+xWuPCxZzShmM5ncBFJQSoLgN5inPE0iCb6t0RK7Rb+UEefmXx+QzCtgM+Z9XekKw4SpixNeNiXaenvkVvr0JYPbnznDpvGAGJiEQ2MWhN6O209GZEFUval6ht+SAF27BwAcZErbiEwiJ5k5N97xvXzJuuo2obymsrw+HFYDY8yiWPhp7BhaicqFg2Cb+E6mRFB4mUXlmi8fQCUSSESr3UZEPOfK4DzHVTsM5RepHDcjKbBnYIgFpw073nzF8wvpvt0Q129mq7b+M50UUnmSHaYHy42gv99nVsma4B6jgafzhYeE3Q3fH2r7+6o3gCMVOkFNu/pYV+5blEZoDEu2lSflkilxHbk+2Xgh8sPn2W9XKTJrSRiZp0LkBFmR+gRGSLYeUJ8CfGyFnb3khU8L2D9LN8PRBq2nM664IgMEkQ== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 9/7/26 10:13, Ye Liu wrote: > 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_rculock(), > which scopes the RCU read lock to the loop body via scoped_guard(rcu). > > No functional change. > > Signed-off-by: Ye Liu > Acked-by: Michal Hocko > Reviewed-by: SJ Park > --- Acked-by: David Hildenbrand (Arm) -- Cheers, David