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=-0.6 required=3.0 tests=DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS,T_DKIM_INVALID autolearn=ham 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 4D150C6778D for ; Tue, 11 Sep 2018 10:48:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 298A920866 for ; Tue, 11 Sep 2018 10:48:18 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=aepfle.de header.i=@aepfle.de header.b="R3yW5Yk3" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 298A920866 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=aepfle.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726811AbeIKPrB (ORCPT ); Tue, 11 Sep 2018 11:47:01 -0400 Received: from mo4-p00-ob.smtp.rzone.de ([81.169.146.217]:16576 "EHLO mo4-p00-ob.smtp.rzone.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726563AbeIKPrB (ORCPT ); Tue, 11 Sep 2018 11:47:01 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; t=1536662893; s=strato-dkim-0002; d=aepfle.de; h=References:In-Reply-To:Message-ID:Subject:Cc:To:From:Date: X-RZG-CLASS-ID:X-RZG-AUTH:From:Subject:Sender; bh=zMIo+QlP6NjELxgWRYGvAFr9yVC1RA7i3HR5e/ce+28=; b=R3yW5Yk3VZWVM4V8xodXtyAuLbNy0H+Aj7tNYicUWMxxlg1tj8Jk2Vy4+vRhXkn9RS APnNcQfIK40eALXrkEQH6dAAlaYjRGUyijR6ViiuSXJRSwetkro+Vxf0iVIGZalorMdK pcgqfObtViTTXf4jx6F0sb6W/J5yXlm4tXe8QEhycTxkEvjQ3QCIxjPuv/1cnct/f6Mp aaJ4J5dciybFkiPpl06fFos6XM7D2hfLHpenFJ3IBzujVlBsRl6MJlgG42Dv9PXO+HW7 PR4i9WnGSaPmvE+CCj3rg9P8/1vjwUHXDfZ0HUeVvKQUaASuzxRKy12IUmGQ4OtfLBF3 ECXA== X-RZG-AUTH: ":P2EQZWCpfu+qG7CngxMFH1J+3q8wa/QED/SSGq+wjGiUC4oc0Nr2ihluivIFRoeSV8ZanCUTzXkL91T4E0V3TMz5ObAI+PLPmQ==" X-RZG-CLASS-ID: mo00 Received: from sender by smtp.strato.de (RZmta 44.0 AUTH) with ESMTPSA id L0862bu8BAmDQUb (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (curve secp521r1 with 521 ECDH bits, eq. 15360 bits RSA)) (Client did not present a certificate); Tue, 11 Sep 2018 12:48:13 +0200 (CEST) Date: Tue, 11 Sep 2018 12:48:08 +0200 From: Olaf Hering To: Boris Ostrovsky Cc: xen-devel@lists.xenproject.org, Juergen Gross , open list Subject: Re: [PATCH v4] xen: avoid crash in disable_hotplug_cpu Message-ID: <20180911124808.18dfe8bf.olaf@aepfle.de> In-Reply-To: <20180911095258.5ed9e9b7.olaf@aepfle.de> References: <20180907143135.29608-1-olaf@aepfle.de> <4f623671-e1aa-1804-449c-a26b0c4b9ce9@oracle.com> <20180911095258.5ed9e9b7.olaf@aepfle.de> X-Mailer: Claws Mail 3.16.1 (GTK+ 2.24.32; x86_64-suse-linux-gnu) MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; boundary="Sig_/Sfd2.ijTAWqtljGsgLZh_Oj"; protocol="application/pgp-signature" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --Sig_/Sfd2.ijTAWqtljGsgLZh_Oj Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Am Tue, 11 Sep 2018 09:52:58 +0200 schrieb Olaf Hering : > As J=C3=BCrgen suggested in another mail, Xen should probably disable hot= plugging > for cpu#0 in the generic setup code. Then cpu_is_hotpluggable(cpu) would > do the right thing. The relevant code is all private to arch/x86/kernel/topology.c. There is no way to set .hotpluggable prior to register_cpu. I guess you need to work that out with the x86 maintainers. Olaf --Sig_/Sfd2.ijTAWqtljGsgLZh_Oj Content-Type: application/pgp-signature Content-Description: Digitale Signatur von OpenPGP -----BEGIN PGP SIGNATURE----- iF0EARECAB0WIQSkRyP6Rn//f03pRUBdQqD6ppg2fgUCW5edaAAKCRBdQqD6ppg2 fjWwAKCrFv/vHuKzbfIPZpQl9g2/TGaUigCg5UQ5+KRUfGnXJOUk7MH2kT2H6uo= =QfE0 -----END PGP SIGNATURE----- --Sig_/Sfd2.ijTAWqtljGsgLZh_Oj--