Received: by 2002:a05:7412:2a91:b0:fc:a2b0:25d7 with SMTP id u17csp346628rdh; Tue, 13 Feb 2024 20:45:39 -0800 (PST) X-Forwarded-Encrypted: i=3; AJvYcCXYUX6v5WPrBTPnCDuiWsRUb5PsJmS0rzT6R9tMznvBWfXfa4bxB+wOYI3qgII67XzehVytPfXxzVxaOG35198EXuxKGGTeAPrXCIIj3g== X-Google-Smtp-Source: AGHT+IFQs9lZnxz7hx6icbXTeBkt+TIMVxfA7BVR+GQWjyvd98qXbWqebZIm/NZQ2b+CaM0egNJv X-Received: by 2002:a05:6358:340b:b0:178:fe3e:1e35 with SMTP id h11-20020a056358340b00b00178fe3e1e35mr1504482rwd.13.1707885939318; Tue, 13 Feb 2024 20:45:39 -0800 (PST) ARC-Seal: i=2; a=rsa-sha256; t=1707885939; cv=pass; d=google.com; s=arc-20160816; b=BArYt/OZrh8yJQx5RrbKeefHMtknPX6siy4afvu5ru/pdTJOnArUqi4RV8EJBcVle0 v9emiss27aRb9uHaROIxjvMw0y8FtGLAN7dchWTwqrRPDlSYi3kIVdSxiNppcMkZPGqJ tFyEn6XWbYVyYTTNpCv8aStPzyYLi3IumO6f+p58MmLEDg18n6/WfVnSXZBKHbb9oreS ICAv52XpQvi0fvPK/JGwHJqck8rcvZVjUnokCVoP2KjprLbJQT565v/75HRLHE3/A1I/ BUHt2O4eYah3ZKB4fvK9oVvoSHsACWKCHRQiiF71frycDVxwcxhj00RYpygLH1Y3cQGz OmYw== ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=sender:in-reply-to:content-disposition:mime-version :list-unsubscribe:list-subscribe:list-id:precedence:references :message-id:subject:cc:to:from:date:dkim-signature; bh=JadPxG6WJhYUcvS6+IGeTjuA2qbpxxQZu/A1yx9oNs0=; fh=m3LZGa7AiFhmKjpjF8LbGASB3gqEheZuvvmhRh6HQX8=; b=ipRmsFBik22j4XsUYjjqRXDjjw3fHxuo6iti/KPXlR57chChhBN15URvkJstUmMxB+ pCj8B8EjCQd8PXD9UNg46KxEuFDG3QVupVhg9wSisZHxiyxMC0pycE//jNXxyWtaHHjq 2/epG4mrrwATLn1gyAImqcN7u1d4pZZYDaa5tMyPVuQqeJ4/zDt/Bi+DjlurVcmU2ikK CWMlJ2nu4m4GPnZU0YXWnUxQAwH1di0QMCmQDbzHvnfuN6XtYdj/O3dtqLtWq+A/sUAU e3fY4dsmVvBLyc/iHbaWmmYjksuIIySsqMal3//u/Gf1LB5Q1ifhBXut+KP1o0bx1LDR nTaw==; dara=google.com ARC-Authentication-Results: i=2; mx.google.com; dkim=pass header.i=@infradead.org header.s=bombadil.20210309 header.b=CPQtwNPy; arc=pass (i=1 dkim=pass dkdomain=infradead.org); spf=pass (google.com: domain of linux-kernel+bounces-64429-linux.lists.archive=gmail.com@vger.kernel.org designates 139.178.88.99 as permitted sender) smtp.mailfrom="linux-kernel+bounces-64429-linux.lists.archive=gmail.com@vger.kernel.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org X-Forwarded-Encrypted: i=2; AJvYcCXX6+tF9gUEWmaS9/DecS68ZGw7dLwQSObAnTAdiAjKtOQlTBnCJwFXZHnFK8jWfMa4jlT8rqV3k/e9kkkmkbCVfqreuwvKxlxG3YFdxA== Return-Path: Received: from sv.mirrors.kernel.org (sv.mirrors.kernel.org. [139.178.88.99]) by mx.google.com with ESMTPS id 14-20020a630e4e000000b005dc504b30ecsi3160933pgo.108.2024.02.13.20.45.38 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 13 Feb 2024 20:45:39 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel+bounces-64429-linux.lists.archive=gmail.com@vger.kernel.org designates 139.178.88.99 as permitted sender) client-ip=139.178.88.99; Authentication-Results: mx.google.com; dkim=pass header.i=@infradead.org header.s=bombadil.20210309 header.b=CPQtwNPy; arc=pass (i=1 dkim=pass dkdomain=infradead.org); spf=pass (google.com: domain of linux-kernel+bounces-64429-linux.lists.archive=gmail.com@vger.kernel.org designates 139.178.88.99 as permitted sender) smtp.mailfrom="linux-kernel+bounces-64429-linux.lists.archive=gmail.com@vger.kernel.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: from smtp.subspace.kernel.org (wormhole.subspace.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by sv.mirrors.kernel.org (Postfix) with ESMTPS id 69F6728C3EC for ; Tue, 13 Feb 2024 22:11:13 +0000 (UTC) Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 7441A6A03D; Tue, 13 Feb 2024 22:05:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="CPQtwNPy" 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 2001C62A14; Tue, 13 Feb 2024 22:05:47 +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=1707861948; cv=none; b=tLllnxk/OUppZBsDdS863ssU1jPjhgolSBTh1+shLz49GUD6yYMM2S/1zPTaz3nCJLchs6t/FIhLgx3sxtTLkh7bWt0rFWVOhH+J3VWw0vLjn/a8Hq68louQZ0/pt//xQFD6gBqmLFL1lFHpTH61IRdS6SfLj/BAosSqlJ5BxSg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707861948; c=relaxed/simple; bh=DppRKrPmqw+3GKjCJBp1hknt3cyP9HMEeCzes6f3UmU=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=tRO9gXCXpLJlM1p0qaHiLzIY94I4qzSvmLngAFr5yNmkmkxpdPR9gJsy54YHFRmkstdgHOTuTA6hE1xyrGk78lsIYo5VUqmgO+dSMzdX9rnkRfkq6/c13gM0SxUe+ybieR4f5N5eifijFbA6npp34jagSBnvxwfrXgkyxJdcGGM= 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=CPQtwNPy; 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 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=JadPxG6WJhYUcvS6+IGeTjuA2qbpxxQZu/A1yx9oNs0=; b=CPQtwNPysUDgngBInSv6kmWZWN XjjxOCdU1RnMmnRTFinL1qVF0bVOMeUBB4THmC07L+mOS/XUH9oxBsZ5w7w0m45kVwz+oCC6ndU1e /8iHvlTqC0srnYNWT7WwqjKN683FnVWvUhHo6tUcXQkrBhQOtmvH2T+PZxm+oEKueUq88Ql6lFEPl KAwtbarvdKhop40jlDZYgmOHik9KeoHRVfCjg4Ppc0rXdsHGH9m+XwEqBn8GVQ/CaCFLqvxtPNz5z lMj03Q6Du7jkFhIbr3GdTUjgY8T213sBU9bUySaEBb88FimyLZUiwrUBc7XLuYm6bfNwpD7BfYaDz VwjAzbww==; Received: from mcgrof by bombadil.infradead.org with local (Exim 4.97.1 #2 (Red Hat Linux)) id 1ra0uJ-0000000Aypi-13wd; Tue, 13 Feb 2024 22:05:39 +0000 Date: Tue, 13 Feb 2024 14:05:39 -0800 From: Luis Chamberlain To: Zi Yan Cc: "Pankaj Raghav (Samsung)" , linux-mm@kvack.org, "Matthew Wilcox (Oracle)" , David Hildenbrand , Yang Shi , Yu Zhao , "Kirill A . Shutemov" , Ryan Roberts , Michal =?iso-8859-1?Q?Koutn=FD?= , Roman Gushchin , Zach O'Keefe , Hugh Dickins , Andrew Morton , linux-kernel@vger.kernel.org, cgroups@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kselftest@vger.kernel.org Subject: Re: [PATCH v4 5/7] mm: thp: split huge page to any lower order pages (except order-1). Message-ID: References: <20240213215520.1048625-1-zi.yan@sent.com> <20240213215520.1048625-6-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: <20240213215520.1048625-6-zi.yan@sent.com> Sender: Luis Chamberlain On Tue, Feb 13, 2024 at 04:55:18PM -0500, Zi Yan wrote: > From: Zi Yan > Order-1 folio is not supported because _deferred_list, which is used by > partially mapped folios, is stored in subpage 2 and an order-1 folio only > has subpage 0 and 1. The LBS patches has the patch from Matthew which enables and allowed us to successfully test order 1. So this restriction could be dropped if that gets merged. Luis