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 AA40DC3DA4A for ; Mon, 19 Aug 2024 12:08:19 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 1477A6B0083; Mon, 19 Aug 2024 08:08:19 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 0F6366B0085; Mon, 19 Aug 2024 08:08:19 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id EFFD16B0088; Mon, 19 Aug 2024 08:08:18 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0012.hostedemail.com [216.40.44.12]) by kanga.kvack.org (Postfix) with ESMTP id D08446B0083 for ; Mon, 19 Aug 2024 08:08:18 -0400 (EDT) Received: from smtpin26.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay08.hostedemail.com (Postfix) with ESMTP id 78AC014126F for ; Mon, 19 Aug 2024 12:08:18 +0000 (UTC) X-FDA: 82468872276.26.2F009AA Received: from frasgout.his.huawei.com (frasgout.his.huawei.com [185.176.79.56]) by imf29.hostedemail.com (Postfix) with ESMTP id E7775120013 for ; Mon, 19 Aug 2024 12:08:15 +0000 (UTC) Authentication-Results: imf29.hostedemail.com; dkim=none; dmarc=pass (policy=quarantine) header.from=huawei.com; spf=pass (imf29.hostedemail.com: domain of jonathan.cameron@huawei.com designates 185.176.79.56 as permitted sender) smtp.mailfrom=jonathan.cameron@huawei.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1724069281; a=rsa-sha256; cv=none; b=uWUHbwPxI4myBKtfWeKgqVXwsHkzAbKWQwWkYA3q2YDYrRmYBcQTzVv9u9IWdh1lx4lw8l Ms5nWTYdM52RhrfrcZWaP5T//gYLHWCO0udCvpzzoAeHEUzqyKLvfW8ugPQ5XSLiY+B+K3 sPmO26CR3QROTIdIqW9A2gUmmbYVHts= ARC-Authentication-Results: i=1; imf29.hostedemail.com; dkim=none; dmarc=pass (policy=quarantine) header.from=huawei.com; spf=pass (imf29.hostedemail.com: domain of jonathan.cameron@huawei.com designates 185.176.79.56 as permitted sender) smtp.mailfrom=jonathan.cameron@huawei.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1724069281; 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; bh=kIyVn891fFJIEgg69KNeJeCSDGJxyJ1w3Ln58kjZFOM=; b=oh8j5VdOa9EMHVTAYCrqpP3Vit0LKup+2cBFMHTXRiu+mbwoYNeHg4MTXTywJEwio6nPic r+vf06tIUS/b8ARAtQsNojhCgDAUJS0G9Q6WE9d4RR1ibB+IgDMvGv2F4LT0erykRyr7/U iJoO2hgz9xWxudQ/OsWapmar27DcWyU= Received: from mail.maildlp.com (unknown [172.18.186.231]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4WnWWK6Nx3z6K9KZ; Mon, 19 Aug 2024 20:05:17 +0800 (CST) Received: from lhrpeml500005.china.huawei.com (unknown [7.191.163.240]) by mail.maildlp.com (Postfix) with ESMTPS id ED573140D1D; Mon, 19 Aug 2024 20:08:10 +0800 (CST) Received: from localhost (10.203.177.66) by lhrpeml500005.china.huawei.com (7.191.163.240) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2507.39; Mon, 19 Aug 2024 13:08:10 +0100 Date: Mon, 19 Aug 2024 13:08:09 +0100 From: Jonathan Cameron To: Tong Tiangen CC: Mark Rutland , Catalin Marinas , Will Deacon , Andrew Morton , James Morse , "Robin Murphy" , Andrey Konovalov , Dmitry Vyukov , Vincenzo Frascino , Michael Ellerman , Nicholas Piggin , Andrey Ryabinin , Alexander Potapenko , Christophe Leroy , Aneesh Kumar K.V , "Naveen N. Rao" , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , , "H. Peter Anvin" , , , , , , Guohanjun Subject: Re: [PATCH v12 6/6] arm64: send SIGBUS to user process for SEA exception Message-ID: <20240819130809.0000731c@Huawei.com> In-Reply-To: <20240528085915.1955987-7-tongtiangen@huawei.com> References: <20240528085915.1955987-1-tongtiangen@huawei.com> <20240528085915.1955987-7-tongtiangen@huawei.com> Organization: Huawei Technologies Research and Development (UK) Ltd. X-Mailer: Claws Mail 4.1.0 (GTK 3.24.33; x86_64-w64-mingw32) MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit X-Originating-IP: [10.203.177.66] X-ClientProxiedBy: lhrpeml500001.china.huawei.com (7.191.163.213) To lhrpeml500005.china.huawei.com (7.191.163.240) X-Rspam-User: X-Rspamd-Queue-Id: E7775120013 X-Rspamd-Server: rspam01 X-Stat-Signature: 1oo9sdof7zdrhu6is74dsjptchx133x9 X-HE-Tag: 1724069295-346976 X-HE-Meta: U2FsdGVkX19LZ5BqdsATm0JIL3xdk/1Km7Z0D17jNDiUmTjjvCrMFgTTFMmzuNydFpDimBbxvOSfbADrlLEJLYRpza2ye8jvgVRBs3V4KYmPJqq2WOoWp6PtURLJMmHwUMXk7uuFNFtU/kriHlWiLY4Ff529AGY6XIticeHa92sch+VnLrHP0yffvjuC2jl5RrlBrnBSMQhitQbEORgIKrWDW18bMUh6mbNZOB3d6W2yAcPWMeMd26VueJue5DNryLmX7p1lFgscVR9agGLPWBhCsAPP7qgw9Ttu/SND76opZ0d4sc2vI0nCJRJnNji2Db6vxXkfRPZPVzsXBTDm6uGrt70KN1tZdfRrEShjeWdHEgExZE7qLNGDU+vSWyv6uMqovt8VlM7jaIFqQPxTxvQL9OBkd4d4Pt0sXbaRhCB1IRaNEfjs9nJBP5woMQzurMF9qa8jG+5KvdolJZbMz9p+wewtrdTuW2AFBBPZEZY8uxIfv+xpl2sf002iAI9lVaZ2xO9RjLvjqTQFsrpIZRU6vWlB37ZkfSGv6QdYPxb0JODNjWyY6R+VG2uh0ctJdjOCI+FdyHik/ILZwVauENIVlBq4z7fVk+IMP6VHRl9ujUJCzhkIMelfrVIQH921LiMOzQPIvejb+wPsu/8yxLNzDzSuGfYOczwtLZoT4n5MNfnZAY26mIWyDorW9YSf0hdl/7RqFTs0t5Fq04HaUEQ0cdDnpGwoZ6EbbWh+i97CoMf5QZvFpkxyGP98PCpW4N7MP/TJx3Q70/33El+UFqcUl3KybiNfWlRiz3knR8Mh1OcaNEDrBFUiM8L52gV82c2/hZFI97CSrD5Au0FRnLsFKmvwYI2hJB4JWDZN9tYJ2P8uAFP6rBiz9FGRsRWZGJqrBZzUtWuMm4RDTXeLvINF6Z3UFQ9N/8W4EzAODPk4D6zWwne9OXN3S1rU2v16LyGZzwvLrt+gi4TqDIF yr/WVrwY LmYHdO4KC5kVrsj3xdUm5mG0ba8kJujJQyc1UJQ5qbbct4nBftA98pRb52lk3qG6A6EMP4HAnbENn7zgjKxFIpTVmnR13thmYMwg9Qnl5RNMFLPEsLD7zfFpfyLigQki6E5RZswEBVAkW8uPemM4SvD3H6fsW1mbvCh/MlGmgCaRd3Xet10VV7r8tP6f3H+DbYs+p9qDczRbRRZDsy7QvywINDQhepylu7FSb+cZdtDgWtJHgFQeFP41Or+aOqDS6mt4WmXg67bYfUJfSmuw6dbGw4Y1QkXHXgZykMIrgf0VcJC8V37Ge7Pf/PoA+zgq4xqYKsy7XegTwolSMnON68pg1+Q/H1luwUN1L5LnFLot5qGkJm/YIcQIMPEdCSCQU0cyn 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, 28 May 2024 16:59:15 +0800 Tong Tiangen wrote: > For SEA exception, kernel require take some action to recover from memory > error, such as isolate poison page adn kill failure thread, which are done > in memory_failure(). > > During our test, the failure thread cannot be killed due to this issue[1], > Here, I temporarily workaround this issue by sending signals to user > processes in do_sea(). After [1] is merged, this patch can be rolled back > or the SIGBUS will be sent repeated. > > [1]https://lore.kernel.org/lkml/20240204080144.7977-1-xueshuai@linux.alibaba.com/ What's the status of that one? Seems better to help get that in than carry this. Jonathan