From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=115.124.30.119 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794547907; b=pVCREd7q9I0QXoWqipKdhvpJF+psXIvELGJf1nThCyKEVaf/rwmVuoQsItQhLGr1i0KC BIJZX5Vi4hd6IjgZe3s+oTup0SvwQZm20L+hzGQkZRIhjW4vF5SaiV05wkfmTGTxgnVPV Dio0XW8VHJ4YzTzFqn3KkyLDRQclDmFrZlFZw/zp/58XgnnL/JWFeeOSvu1Sf8p7V/Qqw Qf/XLMau5vvYYPPinOoGXBuAyjjal69kz8bPSvI5069RBjQXUH0nV5jB6vaVaoGcgYCdd 1amCNtGLRC8CxXWTHKbAaOPWWZD3lb+LTuRXYzPkvI4WN92Q+WaKzpKWcL49hmkDYeA== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794547907; h=DMARC-Filter:DKIM-Signature:X-Alimail-AntiSpam:Received:Message-ID: Date:MIME-Version:User-Agent:Subject:To:Cc:References:From: In-Reply-To:Content-Type:Content-Transfer-Encoding; bh=q5ccHDNjOaQuKoYDwy7TH67pGGdmawXvtZ8kWuEfWxQ=; b=QFZYJ0ggxTzP52u64/GVc6MjmmVzY5rztom4ab0xVCMi38OHN4lPK6ZTASc22g2KM++J P7AAhGgDKojHS9WMic6vV3F2x6cVqd2MuPyb1hmrC8rv5y93wkPg8yw5B5ysYER5i4anl HtrA7LjnAOlp4ihL3zpBpi/ls8jQu2spKcGdtiXXECiIowPCevon0v8+fJcAX89b7rmOV CSGPw9sDRHBNxP8I/LtHeY9g5jI7f/g5GcTFpW3/qDLmWrmTqGOziqd/drry5YPYsauIE yhUz//iGeTHS6Uo5tQqAL3eTiotXKHSTnOHFQZWr8bv/MfBzug2kgB6eeZIcpRF0asA== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=linux.alibaba.com; spf=pass smtp.mailfrom=linux.alibaba.com; dkim=pass header.d=linux.alibaba.com header.i=@linux.alibaba.com header.a=rsa-sha256 header.s=default header.b=fYwQNPxv; arc=none smtp.remote-ip=115.124.30.119 Received: from out30-119.freemail.mail.aliyun.com (out30-119.freemail.mail.aliyun.com [115.124.30.119]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0A5E1606A31C for ; Fri, 13 Nov 2026 05:31:45 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org 0A5E1606A31C Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.alibaba.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.alibaba.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key, unprotected) header.d=linux.alibaba.com header.i=@linux.alibaba.com header.a=rsa-sha256 header.s=default header.b=fYwQNPxv DKIM-Signature:v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.alibaba.com; s=default; t=1794547902; h=Message-ID:Date:MIME-Version:Subject:To:From:Content-Type; bh=q5ccHDNjOaQuKoYDwy7TH67pGGdmawXvtZ8kWuEfWxQ=; b=fYwQNPxvRQJlzErwIX+teaCpJFwa8yY/UZ/OVdvetOSLA6veOCHBHvy2G1VLMI4nQZ69NdCWq6UzKvJYLWRo3fJAYxryNH7bZBb6DFTSIL9mtJ9AesaMpUoG5GylxxWvnnxSnSr1MaJ39IH5NnRT1KJtsV5Vs2o2yry+Vtbovok= X-Alimail-AntiSpam:AC=PASS;BC=-1|-1;BR=01201311R181e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=maildocker-contentspam033045133197;MF=baolin.wang@linux.alibaba.com;NM=1;PH=DS;RN=14;SR=0;TI=SMTPD_---0XEe41eT_1794547901; Received: from 30.74.144.124(mailfrom:baolin.wang@linux.alibaba.com fp:SMTPD_---0XEe41eT_1794547901 cluster:ay36) by smtp.aliyun-inc.com; Fri, 13 Nov 2026 13:31:41 +0800 Message-ID: <319d4cc3-93a9-46ad-9d03-ceb22d0f0aa2@linux.alibaba.com> Date: Fri, 13 Nov 2026 13:31:40 +0800 X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] mm: mglru: use pte_table_clamped_end() helper to calculate the end To: Barry Song Cc: akpm@linux-foundation.org, david@kernel.org, hannes@cmpxchg.org, kasong@tencent.com, axelrasmussen@google.com, yuanchu@google.com, weixugc@google.com, baoquan.he@linux.dev, qi.zheng@linux.dev, shakeel.butt@linux.dev, mhocko@kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org References: From: Baolin Wang In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit On 11/13/26 1:01 PM, Barry Song wrote: > On Thu, Nov 12, 2026 at 7:13 PM Baolin Wang > wrote: >> >> Use pte_table_clamped_end() to clamp the range to the PTE table and VMA >> boundaries when batch-checking young flags, making the code more readable. >> >> No functional changes intended. >> >> Signed-off-by: Baolin Wang >> --- >> Based on mm/core.git for-next branch. >> >> Note that this was found while reviewing David's series: >> https://lore.kernel.org/all/c31cc8a0-c098-4784-a843-f13f51914094@linux.alibaba.com/ >> --- >> mm/vmscan.c | 2 +- >> 1 file changed, 1 insertion(+), 1 deletion(-) >> >> diff --git a/mm/vmscan.c b/mm/vmscan.c >> index 5495d9be90e8..804d4188e7b4 100644 >> --- a/mm/vmscan.c >> +++ b/mm/vmscan.c >> @@ -4470,7 +4470,7 @@ bool lru_gen_look_around(struct page_vma_mapped_walk *pvmw, unsigned int nr) >> walk = current->reclaim_state ? current->reclaim_state->mm_walk : NULL; >> >> start = max(addr & PMD_MASK, vma->vm_start); >> - end = min(addr | ~PMD_MASK, vma->vm_end - 1) + 1; >> + end = pte_table_clamped_end(addr, vma->vm_end); > > > We don't have pte_table_clamped_end() in Andrew's tree yet; > it's part of David's patch: > > https://lore.kernel.org/all/20261111-pte_table_clamped_end-v1-1-2dbe339c487a@kernel.org/ > > So we're not going through Andrew's tree for this patch, right? Yes. I think David will pick up this follow-up.