From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5AF9DC48260 for ; Tue, 13 Feb 2024 22:05:47 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id E32F86B0083; Tue, 13 Feb 2024 17:05:46 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id DE2F86B009F; Tue, 13 Feb 2024 17:05:46 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id CAB556B00A0; Tue, 13 Feb 2024 17:05:46 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0010.hostedemail.com [216.40.44.10]) by kanga.kvack.org (Postfix) with ESMTP id BB1426B0083 for ; Tue, 13 Feb 2024 17:05:46 -0500 (EST) Received: from smtpin09.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay05.hostedemail.com (Postfix) with ESMTP id 7360740D81 for ; Tue, 13 Feb 2024 22:05:46 +0000 (UTC) X-FDA: 81788163492.09.AE6D22D Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) by imf03.hostedemail.com (Postfix) with ESMTP id CF8F920013 for ; Tue, 13 Feb 2024 22:05:42 +0000 (UTC) Authentication-Results: imf03.hostedemail.com; dkim=pass header.d=infradead.org header.s=bombadil.20210309 header.b=CPQtwNPy; dmarc=fail reason="No valid SPF, DKIM not aligned (relaxed)" header.from=kernel.org (policy=none); spf=none (imf03.hostedemail.com: domain of mcgrof@infradead.org has no SPF policy when checking 198.137.202.133) smtp.mailfrom=mcgrof@infradead.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1707861944; h=from:from:sender:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=JadPxG6WJhYUcvS6+IGeTjuA2qbpxxQZu/A1yx9oNs0=; b=YjwmM7qKOkyBHIM1hrjTxlqTedya2/1YRGcrw1NL4D1K7mdhcUaoubBsCSuo+Gv6g2UjLU UMSrgdkbUVRWu4aVu0nrR4VnZYfSsYKZ5Sz90rh1kkDngTi49mRM9RZ1wHfYmstHFnUrmy 4Tm3M+pASuW6xc97Osj6f8TtUncWuBk= ARC-Authentication-Results: i=1; imf03.hostedemail.com; dkim=pass header.d=infradead.org header.s=bombadil.20210309 header.b=CPQtwNPy; dmarc=fail reason="No valid SPF, DKIM not aligned (relaxed)" header.from=kernel.org (policy=none); spf=none (imf03.hostedemail.com: domain of mcgrof@infradead.org has no SPF policy when checking 198.137.202.133) smtp.mailfrom=mcgrof@infradead.org ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1707861945; a=rsa-sha256; cv=none; b=IKJvQT158CZEgpGsZ6/ASfN69tSulj2w63Zcbj268QPUO7uUtPmBekOQvCPcQt2BD5Y39U gymXQ28XR0hNUFK/XvsQQi9IBWG5Q3GV+g5FKKoxdKhz0G72abeuFcjFgWr0+QZQMWOGbs bpyc5M3eOVgZfp1gcCKtnf7rgY7I4fg= 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> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20240213215520.1048625-6-zi.yan@sent.com> X-Rspamd-Queue-Id: CF8F920013 X-Rspam-User: X-Rspamd-Server: rspam04 X-Stat-Signature: gwzkit6569cbss7f3wmgieocf9gotfz5 X-HE-Tag: 1707861942-299730 X-HE-Meta: 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 8KfTTYeX 0Y6j4Ivw9spmOMOC5RbOTsewSr4+RVKuIH8rf X-Bogosity: Ham, tests=bogofilter, spamicity=0.000001, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: 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