From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-qk1-f172.google.com (mail-qk1-f172.google.com [209.85.222.172]) (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 833A0509F11 for ; Mon, 7 Sep 2026 15:43:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.222.172 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788795805; cv=none; b=VAeizENAoReGuHqxr9xXWcsabu/U9vYCEFVrsl4aGIznj5zEBGLcfX4TUjQIfi9agmEtJqeTBit1YYvoJdSLkU7FR9oJpklbPvDTJk+e73OgWSuYdveT/EOuAIh6c0tXWdeyNwZb4a9xN8jlebjkPdws6uhC9M93+z/9tESAbeM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788795805; c=relaxed/simple; bh=MICC69rDhpY77nwXlWteXYHHthmexIfa62lpP2Cj7Co=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=bZSDPUIl7NOJ7vaiEyiED8YBMYzLoszSeLuvjUkIV542ST4rK0TE1LT+V+3/ZfAcPMS/oCRglkh4k8hw6v4NEGXfUkADZty9x/vFhWsqvvxMuO6kkimPO/Klw9OLyJuG9enMjdR6QEEHsvpwyj3T5fwpxAMA39Vbt+f4DiQDXZ8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=gourry.net; spf=pass smtp.mailfrom=gourry.net; dkim=pass (2048-bit key) header.d=gourry.net header.i=@gourry.net header.b=Dcby7mMa; arc=none smtp.client-ip=209.85.222.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=gourry.net Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gourry.net Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gourry.net header.i=@gourry.net header.b="Dcby7mMa" Received: by mail-qk1-f172.google.com with SMTP id af79cd13be357-9399997417aso156693685a.2 for ; Mon, 07 Sep 2026 08:43:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gourry.net; s=google; t=1788795802; x=1789400602; darn=vger.kernel.org; h=in-reply-to:content-disposition:content-type:mime-version :references:message-id:subject:cc:to:from:date:from:to:cc:subject :date:message-id:reply-to:content-type; bh=9N6f/b+RDjU+5LdwC1W3FgNOtZzFd5njRslDhw37g/s=; b=Dcby7mMa23igHcsyogt4hMcsQ+LF9/ES8wasSJN5liRTHzn6a+6B8eXPqKM0aOy1Uq x9PaKWDzBn1NBHviEWZtE9wBpsyTU44o/5IhM4HkZHowaBVBQ7TwQxBmmNUaTpq31Z1R 3NHxEtcae0R7ht9bjMQLD5quH78Ei9I7pWfkkADIT42Fh3jUNU06bgnkfg3/E4MsGxdO LXi0zYbnzstFxw5QmexR0S35KLzBUoQ/5kuCbBwEnHSnlN4Y0CtzlckZOBIq8p12pC6R gvaFbq6dtBVtj4sZ/m8gBRTbhGEiaABmWOIhFYsKEQFGBbyytulKzhaZW5RJZqer41Am SezA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1788795802; x=1789400602; h=in-reply-to:content-disposition:content-type:mime-version :references:message-id:subject:cc:to:from:date:x-gm-gg :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to :content-type; bh=9N6f/b+RDjU+5LdwC1W3FgNOtZzFd5njRslDhw37g/s=; b=OA70jhlb0FDsvc+07NGrjJ1Ti07Bq4T1rMgMWN0fDsCMfPQMS3QKO8Z9pbCdcOzJob 6zM0aj8Umt4jpuvWGLU7m9Dy1arga8uaissUpfvSl8aBySCmkILon3mUQ3kvD+2aRbNQ bqbGsZUjhC2KUnXMWGjnC9n099t/1r/KPHnS2VMwSTlNPaHc6es7ePvKccsU66NyTb6c FoXe/liyw1MaUFI8uCoWVchZrf1bZnwZxxoXyqTwAoiBdfyl6Fo3zK+ZA5NKY5Qc5iuJ 0hwQJMOmBbaDJXYPuKBhO+25asxa9XgCVMyUi3JlqPUsH+sv6DwZz+8189bKis6lGGIE TLxw== X-Forwarded-Encrypted: i=1; AKwUvBwZyyt7TUDbYWwt7Z9fRPciZQIjwGwo/fW2lrqhTW+/9KY3TIbGNGXWzHWDPpjEysVP6He0IKR4/BWisFg=@vger.kernel.org X-Gm-Message-State: AFuF++lc3d/IZhcMZU7hkVhYOxnhLskMsQ4RxKDfmjXWEDOix3TuTtl+ QFcDjJLGFajaTBI4SBX+KwNDFTxQN2igcoezU2yn8SRJTe2u89GLqaiCgxE5jiB7q1E= X-Gm-Gg: AYBFou0HCGhUPrKIIwzate5ARB5SO1e80k5DuQzFNi+vHlfOreI0vZhGa+tfWN26KO0 jE0i2FeW7qldAZakXJ7obWwSTTFiPIaPeGNAHUiJuyML3pW1r5TTkhnAmcuECs4N1Xt9mPnlRxp ZhG7yhm9LArMs8Xkc7MsJuklOxocVphagPU3PS700EHZFw/kjp7oqQEWm1zHbLvYYamZUphowdE lnGSGEVi4qBZTDXdpdWsxiOOC/G/ux3OvU8ZkKikmv+DcJ/ctpiARm70GfzdUVMB/dLd8IPaJaD F36egKLdoFqxCG5ymOhpoBIYiwHQcHltXiQ3JzwCw5V5IRcsmdtMLQhJRRI9iowDlXzEoS2ZfZP vEndJ0kitnHNRH7ZkjAzyNlFDe74CZmyIBcjmuyokSziULL7YSxC65S5nc8iwdx0wfDFLbdcTWZ 1ZatTRBduMwuYZuUZNke6aOhcIlYpls6NrivyKxVmrzNj3DayliOFU11FH9Y+V8mPpYKmXTSIkE JG4sLZFU3pj10vBL1Q0F3rNW1R/vyWVYMXdg2f7LpyE X-Received: by 2002:a05:620a:1a10:b0:939:93f:3b41 with SMTP id af79cd13be357-93980341197mr2411106785a.16.1788795802336; Mon, 07 Sep 2026 08:43:22 -0700 (PDT) Received: from gourry-fedora-PF4VCD3F (pool-173-79-60-52.washdc.fios.verizon.net. [173.79.60.52]) by smtp.gmail.com with ESMTPSA id 6a1803df08f44-910406bf8c3sm94620766d6.48.2026.09.07.08.43.20 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Sep 2026 08:43:21 -0700 (PDT) Date: Mon, 7 Sep 2026 11:43:19 -0400 From: Gregory Price To: Ye Liu Cc: Andrew Morton , David Hildenbrand , 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 Subject: Re: [PATCH v2 3/8] mm/ksm: convert process iterator to for_each_process_rculock Message-ID: References: <20260907081334.1152889-1-ye.liu@linux.dev> <20260907081334.1152889-4-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-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260907081334.1152889-4-ye.liu@linux.dev> On Mon, Sep 07, 2026 at 04:13:29PM +0800, 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 Reviewed-by: Gregory Price (Meta)