From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from m16.mail.163.com (m16.mail.163.com [220.197.31.5]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A39653D7D9B for ; Fri, 26 Jun 2026 06:29:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=220.197.31.5 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782455363; cv=none; b=qYNk1qg8Rqo5IRMsidZlf2Ial1zv8r4IgFzDhgZUvG2CTmf8QEmOWOA+F6BIOItGicDXVNnkR83qIywsSFClmKjQWNuoWZLKPBLPMxBB0O6Q+nOrQ8xKT+sNfwvYQidpZ1eEkHZturtu9BGXmXkczhDlcORC3MG3o8Helk5OkvY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782455363; c=relaxed/simple; bh=Er5P0lRLBiSouJ7AhmPBiUyxXb9smjqpEqSwVE75CR4=; h=Date:From:To:Cc:Subject:In-Reply-To:References:Content-Type: MIME-Version:Message-ID; b=jsp/H6sY9N6yHqn8X6m59MkdfeXrEpygVyc0ZXrpEwzfKiSHlR3vTbnaQSPe/9Vvtu3GC+PvyHxvKyfeIPNhNqCXungpu9PzwLlAAkhH3VWm6cGZ4XQx+NouPv5nJBTpi+PPIrTmMa9TA50wFPmze9dlBO3fiih0YokQN40+PRA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=163.com; spf=pass smtp.mailfrom=163.com; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b=Bcr0RIPQ; arc=none smtp.client-ip=220.197.31.5 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=163.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=163.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b="Bcr0RIPQ" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=163.com; s=s110527; h=Date:From:To:Subject:Content-Type:MIME-Version: Message-ID; bh=Er5P0lRLBiSouJ7AhmPBiUyxXb9smjqpEqSwVE75CR4=; b=B cr0RIPQ10JyEAq9mBAnUgS0xVdbXxFgTkwzNwFnqWsYGxN7O8dik7PWrWDlHFOCK IzSpejoFlVW4IAIyNYtw910KUGy2xkoUWV5AIoUvX++6UMgbjtbRG7LYkWRcoXxX llnE3c1V4HABonGZDIP6lmJ7Gjr7My/W4DmRbEjWOA= Received: from fffsqian$163.com ( [116.128.244.169] ) by ajax-webmail-wmsvr-40-105 (Coremail) ; Fri, 26 Jun 2026 14:28:43 +0800 (CST) Date: Fri, 26 Jun 2026 14:28:43 +0800 (CST) From: fffsqian To: "Muchun Song" Cc: =?GBK?B?uLXH5cus?= , "Andrew Morton" , "Dave Chinner" , "Roman Gushchin" , "Qi Zheng" , linux-kernel , linux-mm Subject: Re:Re: [PATCH 1/1] mm/shrinker: add NULL checks after rcu_dereference() in shrinker bit functions X-Priority: 3 X-Mailer: Coremail Webmail Server Version 2023.4-cmXT build 20260511(2e539873) Copyright (c) 2002-2026 www.mailtech.cn 163com In-Reply-To: <305C42A2-1359-4998-A95C-49998B4660DB@linux.dev> References: <923f391a-d760-4d78-92d4-2e765aa226f3@linux.dev> <6l2gs76zo6zf-6l2n5wa2xbvg@nsmail8.2--kylin--1> <305C42A2-1359-4998-A95C-49998B4660DB@linux.dev> X-NTES-SC: AL_Qu2TAPieuksp5SOeZekckk4Vhu49Xcq2vvQv34Fec+4EmwXL5z8GT11gO2Pk7MiNBCGPlT60YhhUzudqZ7RWMfWGG5jimCwNvQJxj21r5A== Content-Transfer-Encoding: base64 Content-Type: text/plain; charset=GBK Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-ID: <549d2280.4ff8.19f029dcaeb.Coremail.fffsqian@163.com> X-Coremail-Locale: zh_CN X-CM-TRANSID:aSgvCgD33+YbHD5q+HUPAA--.1527W X-CM-SenderInfo: 5iii21xldqqiywtou0bp/xtbCwhs3Amo+HBvr-AAA3o X-Coremail-Antispam: 1U5529EdanIXcx71UUUUU7vcSsGvfC2KfnxnUU== QXQgMjAyNi0wNi0yNiAxMTo0OToxMywgIk11Y2h1biBTb25nIiA8bXVjaHVuLnNvbmdAbGludXgu ZGV2PiB3cm90ZToKPgo+VGhhbmtzIGZvciB5b3VyIGNvbnRyaWJ1dGlvbiEgSSBoYXZlIGEgY291 cGxlIG9mIHF1aWNrIHN1Z2dlc3Rpb25zIHRvCj5oZWxwIHRoaW5ncyBnbyBzbW9vdGhlcjoKPgo+ LSBQbGVhc2UgdGFrZSBhIGNsb3NlciBsb29rIGF0IG91ciBjb21tdW5pdHkgY29tbXVuaWNhdGlv biBndWlkZWxpbmVzLAo+ICBhcyB3ZSByZWx5IG9uIHBsYWluLXRleHQtYmFzZWQgcmVwbGllcyBo ZXJlLgo+Cj4tIEZvciBhbnkgaXNzdWVzIHlvdSdyZSBub3QgY29tcGxldGVseSBzdXJlIGFib3V0 LCBpdCB3b3VsZCBiZSBhd2Vzb21lCj4gIGlmIHlvdSBjb3VsZCBydW4gYSBxdWljayB2YWxpZGF0 aW9uIHlvdXJzZWxmIGJlZm9yZSBzZW5kaW5nIG91dCBhIHBhdGNoLgo+ICBNYWludGFpbmVycycg dGltZSBpcyBxdWl0ZSBsaW1pdGVkLCBzbyB0aGlzIGhlbHBzIGV2ZXJ5b25lIHNhdmUgYSBsb3QK PiAgb2YgZW5lcmd5IGFuZCBzcGVlZHMgdXAgdGhlIHJldmlldyBwcm9jZXNzLgo+Cj5UaGFua3Mg Zm9yIHVuZGVyc3RhbmRpbmcsIGFuZCBsb29raW5nIGZvcndhcmQgdG8geW91ciBuZXh0IHBhdGNo IQo+Cj5UaGFua3MsCj5NdWNodW4KCkhpLAoKVGhhbmsgeW91IHZlcnkgbXVjaCBmb3IgeW91ciBr aW5kIHJlbWluZGVycyBhbmQgdmFsdWFibGUgc3VnZ2VzdGlvbnMuCgpJIHdpbGwgc3RyaWN0bHkg Zm9sbG93IHRoZSBwbGFpbi10ZXh0IHJlcGx5IHNwZWNpZmljYXRpb24gZm9yIGFsbCBmdXR1cmUg bWFpbGluZyBsaXN0IGNvbW11bmljYXRpb25zLgpNZWFud2hpbGUsIEkgd2lsbCBkbyBtb3JlIHN1 ZmZpY2llbnQgY29kZSBhbmFseXNpcyBhbmQgc2VsZi12ZXJpZmljYXRpb24gYmVmb3JlIHN1Ym1p dHRpbmcgcGF0Y2hlcyB0byBhdm9pZCBpbmFjY3VyYXRlIHByb2JsZW0gZGVzY3JpcHRpb24gYW5k IHVubmVjZXNzYXJ5IHJldmlldyBjb3N0LgoKTG9va2luZyBmb3J3YXJkIHRvIHN1Ym1pdHRpbmcg bW9yZSBxdWFsaWZpZWQgcGF0Y2hlcyBsYXRlci4KCkJlc3QgcmVnYXJkcywKUWluZ3NodWFuZyBG dQ==