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 X-Spam-Level: X-Spam-Status: No, score=-0.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 33E40C2BA2B for ; Mon, 13 Apr 2020 23:01:56 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id F15BD20739 for ; Mon, 13 Apr 2020 23:01:55 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="DfQfdNA0"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="I0LpRmLn" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org F15BD20739 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linux-foundation.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:Mime-Version:References:In-Reply-To: Message-Id:Subject:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=GjCgu/qxcofe5thG951YUygVf6YM3AKYMZQKyOP5iK4=; b=DfQfdNA0eMwG0U 5CxEiCSuZV2oRdqrL3vYMap6+bf1R5Srd7ih7gQHxNiKP6sDkve+Hke4gkYx3v2c2xLjf1awOm9VU kRMbEUaavk30n6xCHjb1RHWoqJCGRrOB7ow9BrkVI0Ib4YhfVek5Y1o5dr7Llu/ZaVMhZXKpTXOUU pI9h902ikQHIa4m0hgDXeXQ57CGrWzg4Xo7tfysJ1eU/lOQV+acQntOTPNPX0SG1CzJqny9K4Bmvg V9kpscP82cn1vwn6enPbEsYrhUqjFSsF706k+dMsPA3JxPiB+Ob/gAncpHTfq1fc5XER48Prw+JCp CGfJS7G4ZXLCQyfMDF3g==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jO85R-0001rR-CM; Mon, 13 Apr 2020 23:01:53 +0000 Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jO85K-0001kO-N2; Mon, 13 Apr 2020 23:01:47 +0000 Received: from localhost.localdomain (c-73-231-172-41.hsd1.ca.comcast.net [73.231.172.41]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id E244120692; Mon, 13 Apr 2020 23:01:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1586818905; bh=44iRGhgUpBL1Umz4gkXVcOLAAkGViVM44DVhmCAg1b8=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=I0LpRmLnaOiiltRxGIgIxsNvEkuVdm/mKjb0fOTnxyOLaNUQPkg/LtmkBSdG9c4SE HvlRLCZwWRMWyE+iMrF80ws+63QIFcl0/QuUFud0EsPndT38WASM8ZTAYusEJiZFmh /xJct3V2WVyjF+spChzQdmWe2kjjLoXqk+iCmu5Q= Date: Mon, 13 Apr 2020 16:01:44 -0700 From: Andrew Morton To: ebiederm@xmission.com (Eric W. Biederman) Subject: Re: [PATCH 1/3] kexec: Prevent removal of memory in use by a loaded kexec image Message-Id: <20200413160144.0e07c0033afc474228bc9218@linux-foundation.org> In-Reply-To: <871rorjzmc.fsf@x220.int.ebiederm.org> References: <34274b02-60ba-eb78-eacd-6dc1146ed3cd@arm.com> <80e4d1d7-f493-3f66-f700-86f18002d692@redhat.com> <20200410121013.03b609fd572504c03a666f4a@linux-foundation.org> <20200411034414.GH2129@MiWiFi-R3L-srv> <20200411093009.GH25745@shell.armlinux.org.uk> <20200412053507.GA4247@MiWiFi-R3L-srv> <20200412080836.GM25745@shell.armlinux.org.uk> <87wo6klbw0.fsf@x220.int.ebiederm.org> <20200413023701.GA20265@MiWiFi-R3L-srv> <871rorjzmc.fsf@x220.int.ebiederm.org> X-Mailer: Sylpheed 3.5.1 (GTK+ 2.24.31; x86_64-pc-linux-gnu) Mime-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200413_160146_772498_E3762B77 X-CRM114-Status: GOOD ( 13.93 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Baoquan He , David Hildenbrand , Catalin Marinas , Bhupesh Sharma , Anshuman Khandual , kexec@lists.infradead.org, Russell King - ARM Linux admin , linux-mm@kvack.org, James Morse , Will Deacon , linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Mon, 13 Apr 2020 08:15:23 -0500 ebiederm@xmission.com (Eric W. Biederman) wrote: > > For 3), people can still use kexec_load and develop/fix for it, if no > > kexec_file_load supported. But 32-bit arm should be a different one, > > more like i386, we will leave it as is, and fix anything which could > > break it. But people really expects to improve or add feature to it? E.g > > in this patchset, the mem hotplug issue James raised, I assume James is > > focusing on arm64, x86_64, but not 32-bit arm. As DavidH commented in > > another reply, people even don't agree to continue supporting memory > > hotplug on 32-bit system. We ever took effort to fix a memory hotplug > > bug on i386 with a patch, but people would rather set it as BROKEN. > > For memory hotplug just reload. Userspace already gets good events. > > We should not expect anything except a panic kernel to be loaded over a > memory hotplug event. The kexec on panic code should actually be loaded > in a location that we don't reliquish if asked for it. Is that a nack for James's patchset? _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel