From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) (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 842C417A2F6 for ; Mon, 16 Feb 2026 17:04:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=90.155.50.34 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771261444; cv=none; b=fu4ebO72dWJb+6bk6UBzNsmxigDuZF6Je5u1cY1WllvQW8g2isoR/u1E1bQtwFjZhIO9f9ZYQooKMe6hMcNjKtBMM6Daphb4iYVXlR5duC9IVxxUX3DH01/TNjD90+Cof99Gf5YCr0Ilo8JtRvhw13LPGDywUc9YsH4i5RO5gwE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771261444; c=relaxed/simple; bh=8rrqBsOXq7tTFE/S+d2BVgyPgOet1ZD2JEAmYSGXIfE=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=PbFOKrf4uMW/Et52scpcOj8fB2qCOYc19ToN+pcMF8nrusYOAoHuAfBCT5SuFQ6/yQfgYQwvHoYXBsP+wj4/UOXwkT91KbzzYHbma8s1TwEZVF7nGtrA+UX/6F4Wp9U4Utz0C8OyfXLqW8KSPiw4QxfeLHLNN7jgNPTOmBl2RBw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=infradead.org; spf=none smtp.mailfrom=infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=L9NsmQIP; arc=none smtp.client-ip=90.155.50.34 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=infradead.org Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="L9NsmQIP" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=9QTRehhIk88nkFpqbBLeG3LnUhkOiXioBOK6h6OZvfg=; b=L9NsmQIPrPCGWBUkd78r442qNZ xzognI1NwllgD57v1pcmxM8ZaZAnKYGIB9zMTUCG5PnGEt1ydy90m70pxVbSz4h64nYfDfV8MVpLn A4r0tFpgYbK+WxqB6d3aF1jL6LGKks7JxoDVyeeuULYfCCC7YPNAoDRpC7k9hZUq8AWrQXh+XsoF9 ukwsObtNu7+zg76oSYJsALDOOsS75/eApMok1Ce+p3D/CZyzoz3lLwcXkV6NDsrZAFCF5NToHv62t z41FxGWscy5/miBL26JPJ9EbtqG0qEV64zYFJA6X+pHerdqnuSs0luGf6L6UgaEEW8FSDvuFMUMtx 1auRD3NA==; Received: from willy by casper.infradead.org with local (Exim 4.98.2 #2 (Red Hat Linux)) id 1vs20s-00000002k3c-1EKW; Mon, 16 Feb 2026 17:03:58 +0000 Date: Mon, 16 Feb 2026 17:03:58 +0000 From: Matthew Wilcox To: Wenchao Hao Cc: Andrew Morton , David Hildenbrand , Lorenzo Stoakes , "Liam R . Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] mm: Add AnonZero accounting for zero-filled anonymous pages Message-ID: References: <20260214084514.2842745-1-haowenchao22@gmail.com> 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: <20260214084514.2842745-1-haowenchao22@gmail.com> On Sat, Feb 14, 2026 at 04:45:14PM +0800, Wenchao Hao wrote: > + if (count_zero_page && pages_identical(page, ZERO_PAGE(0))) Pretty sure you want memchr_inv() here?