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 48C62C3065C for ; Wed, 3 Jul 2024 02:13:48 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id D0D606B0089; Tue, 2 Jul 2024 22:13:47 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id CBD4D6B0098; Tue, 2 Jul 2024 22:13:47 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id B839E6B009A; Tue, 2 Jul 2024 22:13:47 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0014.hostedemail.com [216.40.44.14]) by kanga.kvack.org (Postfix) with ESMTP id 9A3256B0089 for ; Tue, 2 Jul 2024 22:13:47 -0400 (EDT) Received: from smtpin12.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay01.hostedemail.com (Postfix) with ESMTP id 38CAF1C1081 for ; Wed, 3 Jul 2024 02:13:47 +0000 (UTC) X-FDA: 82296820494.12.F40F546 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by imf20.hostedemail.com (Postfix) with ESMTP id 7CC1A1C0007 for ; Wed, 3 Jul 2024 02:13:45 +0000 (UTC) Authentication-Results: imf20.hostedemail.com; dkim=pass header.d=linux-foundation.org header.s=korg header.b=Yfj4eJYc; spf=pass (imf20.hostedemail.com: domain of akpm@linux-foundation.org designates 139.178.84.217 as permitted sender) smtp.mailfrom=akpm@linux-foundation.org; dmarc=none ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1719972807; 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=qHTywRhDetotC6xYctWSuzYcTcqD4ua3fOA/tGRtSZA=; b=4gzvNKki0vf6LOdGjTZRsuVpnxnj3wvH5mA01tpjXjqBRjm18+tiF3CC8yYoLDBeUC7Yvs KavN0UvjVrI5QIYS5optDLMqxD/1RBMD7U5buWMkce2fJg05TdZPGS3TdljWss4hPO1LDE HnpfG4fEjfFA/7kx6pKVMIeKZsAwat4= ARC-Authentication-Results: i=1; imf20.hostedemail.com; dkim=pass header.d=linux-foundation.org header.s=korg header.b=Yfj4eJYc; spf=pass (imf20.hostedemail.com: domain of akpm@linux-foundation.org designates 139.178.84.217 as permitted sender) smtp.mailfrom=akpm@linux-foundation.org; dmarc=none ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1719972807; a=rsa-sha256; cv=none; b=D/o7k6z48hGoUIiZ2ESG7SNOChwnfmlq9SUjYssf/YJ2X6gLZ9jXL7mhJgvYW9Tsb5uyi1 p1Z+DpdgJt9Yq3MlEJMj1tZozensYbPi+hNJKTqTbKq4fcE3+51uZ2hcxqq0h6/bjIceBk NPJYADLPf88/DYxPINmjvk3RibNa7uQ= Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id 7DFDE62097; Wed, 3 Jul 2024 02:13:44 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D49F5C116B1; Wed, 3 Jul 2024 02:13:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1719972824; bh=0B0KJjCjfdjRJT2RpzY5cxrGHmC5KY/2taoV0OESIwo=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=Yfj4eJYcf3KuGPNGsqBNp1OHxXefeNQqns/2MujG3QWLJ40q/ROXkwA8vLBD3zHm/ r0BjjfmJpELcv+SeCgNDEYKhPpD2xvPPP/r03A8FUGuGCUGT5/PKWrTP2Uj7AarXuQ C0Xjv0KUEgbq6zFdE2M1Yb8lYYqTP7J8/gCz/NBI= Date: Tue, 2 Jul 2024 19:13:43 -0700 From: Andrew Morton To: Hugh Dickins Cc: Baolin Wang , Nhat Pham , Yang Shi , Zi Yan , Barry Song , Kefeng Wang , David Hildenbrand , Matthew Wilcox , linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: Re: [PATCH hotfix] mm: fix crashes from deferred split racing folio migration Message-Id: <20240702191343.c3f0c0a8725bed7047f4926d@linux-foundation.org> In-Reply-To: References: <29c83d1a-11ca-b6c9-f92e-6ccb322af510@google.com> X-Mailer: Sylpheed 3.8.0beta1 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Stat-Signature: r9inzhg7drgfibcxj9xzbco33547mhgw X-Rspam-User: X-Rspamd-Queue-Id: 7CC1A1C0007 X-Rspamd-Server: rspam02 X-HE-Tag: 1719972825-417732 X-HE-Meta: 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 CL04yklH +6XlwiRpp60t9zFteaznjJ8K9phpnYksy/hMt3hXdR1WkYFyvOFVE5Ulv2qwpTRByNYwlYi3FUXKoZNyv20hKKkr55Ukz42xy4WtsSwDSWmmQhW+9x/WYUNWED43kwtg9Ju610OujQt9FHeuCXtURD7lfkhGaeDINbSDSwQBI5K4FFyZhV1NbTGHk/sjRDr5e+glMAgRGMpSDUktpZY+X2r1SeZ4So8LPXiVHQ9TsatEdWGg= 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: List-Subscribe: List-Unsubscribe: On Tue, 2 Jul 2024 09:15:54 -0700 (PDT) Hugh Dickins wrote: > > > > Anyway, I think this patch can still fix some possible races. Feel free to > > add: > > Reviewed-by: Baolin Wang > > Thanks, but I certainly don't want this to go into the tree if it's > still flawed as you suggest. I queued it for testing but I shall not send it unsrteam until we have sorted these things out.