From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 3449415E5D1 for ; Fri, 2 Feb 2024 19:55:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.137.202.133 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706903746; cv=none; b=HZRTPsRcv0ZA7rG238seBrLNJv73Ba5kt7wNLrB7cZcB8unNNmB4St6sUhrbxqsojKcIBrotpwArhMteBaiZSz2LfHt1HdEJCjvtHjbrkobsHoEWVOlsBAzGY27s0Vpq8DCoSwE41+TG9jIOWSHbcQlo753fR2rvO2OBbBHt0PI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706903746; c=relaxed/simple; bh=EU0DkXtuEpPxXkJb0ovwWc2a7LZbQnjT1r8TTt6pHnM=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=t0fn31D1L6vU/KMjl5umQhoaXCPKipC0LGbMTu4Qk4ml/2H+uiptKmax9tfnRLfwWWY5Q0V2S9u0mjGqhq2ZAfNh5xYTmfjLt6cvXv4KFANFzj19cMB4vI4zRMPWFT0EThsgh1iR+rMVUwzcq3toBPt+W5zRX+LrKDwo+w+Z1Y0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org; spf=none smtp.mailfrom=infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=RJuyJsSb; arc=none smtp.client-ip=198.137.202.133 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.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="RJuyJsSb" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=Sender:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=n2SH0lMwwCSjM2Hx/qGc7tm+N1U0ihXL43efWaf6YFU=; b=RJuyJsSbN5ydhMNMeJ8dEO1MXy hVLPi9v5CdeoYnp2JPK9xhlDUKC2F/S/dlse8/2U0mplPRvgSYXs6O/RDdGf7ce19xoTB7joMmzmG 5erMdnsjKFELoLhgvo8ptH/XNrOnlv4Ww9sme6uYOsFGoaNNwFobDux9nxVFw8H81RCICliMhIJNQ N7mbL0n57pb88e1/I44DOGepKiOwmpleS6WH2cfJFT00sNBPR9z6TkScSljkfyJ2lZNiUDaflRYwf nSxXuHeSEtrPtf+vzt4vHA86ZWIjPT1e/Ebal42gFbXZBK3XTDpAMzUxKRe2qHESEOG81k7GK8DAN Oxo5Fmdw==; Received: from mcgrof by bombadil.infradead.org with local (Exim 4.97.1 #2 (Red Hat Linux)) id 1rVzdP-0000000DHJ6-238D; Fri, 02 Feb 2024 19:55:41 +0000 Date: Fri, 2 Feb 2024 11:55:35 -0800 From: Luis Chamberlain To: Zi Yan Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, "Huang, Ying" , Ryan Roberts , Andrew Morton , "Matthew Wilcox (Oracle)" , David Hildenbrand , "Yin, Fengwei" , Yu Zhao , Vlastimil Babka , "Kirill A . Shutemov" , Johannes Weiner , Baolin Wang , Kemeng Shi , Mel Gorman , Rohan Puri , Adam Manzanares , "Vishal Moola (Oracle)" Subject: Re: [PATCH v3 0/3] Enable >0 order folio memory compaction Message-ID: References: <20240202161554.565023-1-zi.yan@sent.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: <20240202161554.565023-1-zi.yan@sent.com> Sender: Luis Chamberlain On Fri, Feb 02, 2024 at 11:15:51AM -0500, Zi Yan wrote: > From: Zi Yan > > Hi all, > > This patchset enables >0 order folio memory compaction, which is one of > the prerequisitions for large folio support[1]. > > [1] https://lore.kernel.org/linux-mm/20230912162815.440749-1-zi.yan@sent.com/ This URL started being referenced to your patch series instead of the rationale as to why this is important, and that is that compaction today skips pages with order > 0 and that this is already a problem for the page cache. The correct URL which you had in your *first* cover letter is: https://lore.kernel.org/linux-mm/f8d47176-03a8-99bf-a813-b5942830fd73@arm.com/ Luis