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 09F3EC25B08 for ; Wed, 17 Aug 2022 05:43:26 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 41EE96B0073; Wed, 17 Aug 2022 01:43:26 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 3CE7B8D0001; Wed, 17 Aug 2022 01:43:26 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 2BCCC6B0075; Wed, 17 Aug 2022 01:43:26 -0400 (EDT) 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 1C3396B0073 for ; Wed, 17 Aug 2022 01:43:26 -0400 (EDT) Received: from smtpin29.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay01.hostedemail.com (Postfix) with ESMTP id DEE201C6AC5 for ; Wed, 17 Aug 2022 05:43:25 +0000 (UTC) X-FDA: 79807991970.29.419503F Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by imf29.hostedemail.com (Postfix) with ESMTP id 7210C120047 for ; Wed, 17 Aug 2022 05:43:25 +0000 (UTC) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 4EB4B614FF; Wed, 17 Aug 2022 05:43:24 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 314BAC433C1; Wed, 17 Aug 2022 05:43:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1660715003; bh=eO0iTKHSzV5zu2OW1AHPVACUhzexWpCHKWbHsLA3IyE=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=iHLU9TKRjJwKkO5OE7I/ksAsyI6BY+LMp3cx1Q1cEP8beB2C4rA8Xn/U1TEMbLGWl wb77SXwP7DeBWpQIh1u4ML6uVyeTU9RHGVZLUgDDPsQf2grtXQjcrFLQUrAX3PcI9/ sgfKzwSStjyTLI8rYImkTntzXfNiQDBKfDWWF3KQ= Date: Tue, 16 Aug 2022 22:43:22 -0700 From: Andrew Morton To: "Wang, Haiyue" Cc: "linux-mm@kvack.org" , "linux-kernel@vger.kernel.org" , "david@redhat.com" , "apopple@nvidia.com" , "linmiaohe@huawei.com" , "Huang, Ying" , "songmuchun@bytedance.com" , "naoya.horiguchi@linux.dev" , "alex.sierra@amd.com" , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Mike Kravetz Subject: Re: [PATCH v6 1/2] mm: migration: fix the FOLL_GET failure on following huge page Message-Id: <20220816224322.33e0dfbcbf522fcdc2026f0e@linux-foundation.org> In-Reply-To: References: <20220812084921.409142-1-haiyue.wang@intel.com> <20220816022102.582865-1-haiyue.wang@intel.com> <20220816022102.582865-2-haiyue.wang@intel.com> <20220816175838.211a1b1e85bc68c439101995@linux-foundation.org> X-Mailer: Sylpheed 3.7.0 (GTK+ 2.24.33; x86_64-redhat-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1660715005; a=rsa-sha256; cv=none; b=4ElQwqb6YreqMLjdAsWhQiLWngRJM6Ss3qpUY+aMOuZPDieJySI69Rplfk32KViB0UCRqO EzwrpLmZgYoq+SpdzaV//SJXjBbKYHBkZVoRIZuSdV1fUvT0GSF/5Aoo3PFr4uhVYG2FWr WKZy+UFuBzQu2ByTWUkD0VrnFpVpfOo= ARC-Authentication-Results: i=1; imf29.hostedemail.com; dkim=pass header.d=linux-foundation.org header.s=korg header.b=iHLU9TKR; dmarc=none; spf=pass (imf29.hostedemail.com: domain of akpm@linux-foundation.org designates 139.178.84.217 as permitted sender) smtp.mailfrom=akpm@linux-foundation.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1660715005; h=from:from: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:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=RZgo6sxETuiLbGeP2iSOoeMKtQ0r8HZXX4wfThKgySM=; b=YG+b/GQtxhiTsjRggmlBRDoY/j30LEvaZUGN0Qc1Sam7q501zofSTPES6E56QdFJllehN/ QU1mAjh4YunIhkqb86NdvSB/8IaJEIXDXpm6cxxXe04CLzakqXOZI2+g8VJn7LG7PGP4hd VLQ7lp+NXIV7LL7/wTSZ6R5tpNN8R6c= X-Stat-Signature: y9jp5pzpufekrqpqg3wdhhmwt7oqc3o1 X-Rspamd-Queue-Id: 7210C120047 Authentication-Results: imf29.hostedemail.com; dkim=pass header.d=linux-foundation.org header.s=korg header.b=iHLU9TKR; dmarc=none; spf=pass (imf29.hostedemail.com: domain of akpm@linux-foundation.org designates 139.178.84.217 as permitted sender) smtp.mailfrom=akpm@linux-foundation.org X-Rspam-User: X-Rspamd-Server: rspam10 X-HE-Tag: 1660715005-656222 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Wed, 17 Aug 2022 03:31:37 +0000 "Wang, Haiyue" wrote: > > > } > > > > I would be better to fix this for real at those three client code sites? > > Then 5.19 will break for a while to wait for the final BIG patch ? If that's the proposal then your [1/2] should have had a cc:stable and changelog words describing the plan for 6.0. But before we do that I'd like to see at least a prototype of the final fixes to s390 and hugetlb, so we can assess those as preferable for backporting. I don't think they'll be terribly intrusive or risky?