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, URIBL_BLOCKED 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 0654CC433F5 for ; Fri, 7 Sep 2018 05:45:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E6E9E20645 for ; Fri, 7 Sep 2018 05:45:28 +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="p0yjpKT3" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E6E9E20645 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 S1727671AbeIGKYm (ORCPT ); Fri, 7 Sep 2018 06:24:42 -0400 Received: from mo4-p00-ob.smtp.rzone.de ([81.169.146.216]:20984 "EHLO mo4-p00-ob.smtp.rzone.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726197AbeIGKYl (ORCPT ); Fri, 7 Sep 2018 06:24:41 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; t=1536299123; 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=S+CE7bZJZNIEjj6hOGWIr2sWzXIHVWJuoqQwoeMT5cc=; b=p0yjpKT3FpLEelJXXV5ZqEatPuZBvB1D2FvDaKR25n5DrbQ14V8GE6AHYtZrw4sUUx vQutnJdeBMN81xOf4vQ4mj18DSMmAvxw/xqwQof0V121mhiD6C+r0E0rayP10/GGJH9E ZxE/C8yGvtBcHY2HjQlQAy5WAqzvshPMfAfzaH7EkJKHlNsIWdPXuvfkbtCwkhua2vk3 7yNsPY5EKjDngrAW9H/O5F9KIa2NxLhNqR5tYjEqQMn22r26KYdMITUhTdqnGNt7ivOR 9n0guVlw/BhfqYUXRchDelGVefF0P5PiL4LVRzyJ+kSp/bMT933Bzin94GaDxr44sNg2 XUVw== X-RZG-AUTH: ":P2EQZWCpfu+qG7CngxMFH1J+3q8wa/QED/SSGq+wjGiUC4oc0Nr2ihluivsAQtyRsdRVZ54BGpAypu4eYvjwzPAqxRcXNDW+" X-RZG-CLASS-ID: mo00 Received: from sender by smtp.strato.de (RZmta 44.0 AUTH) with ESMTPSA id L0862bu875jLCvg (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); Fri, 7 Sep 2018 07:45:21 +0200 (CEST) Date: Fri, 7 Sep 2018 07:45:16 +0200 From: Olaf Hering To: Boris Ostrovsky Cc: xen-devel@lists.xenproject.org, Juergen Gross , open list Subject: Re: [PATCH v2] xen: avoid crash in disable_hotplug_cpu Message-ID: <20180907074516.0b41c22c.olaf@aepfle.de> In-Reply-To: <20180906223145.37f7009b.olaf@aepfle.de> References: <20180906063712.28639-1-olaf@aepfle.de> <20180906223145.37f7009b.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_/brc6enfNc+w_nEhkbdKk8pt"; protocol="application/pgp-signature" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --Sig_/brc6enfNc+w_nEhkbdKk8pt Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable Am Thu, 6 Sep 2018 22:31:45 +0200 schrieb Olaf Hering : > IF cpu0_hotpluggable is broken, then only "if (!cpu) return;" can help. Another option is to do cpu_online() twice to check if device_offline did a= nything. Not sure if the compiler would fold the two checks into a single check. Olaf --Sig_/brc6enfNc+w_nEhkbdKk8pt Content-Type: application/pgp-signature Content-Description: Digitale Signatur von OpenPGP -----BEGIN PGP SIGNATURE----- iF0EARECAB0WIQSkRyP6Rn//f03pRUBdQqD6ppg2fgUCW5IQbAAKCRBdQqD6ppg2 fonmAJ43xS6t1EFuJyUjloE4fVpnnuEtTwCgzjLUMBW90a4+dgJfyWxEbKC4g3Y= =GVQ8 -----END PGP SIGNATURE----- --Sig_/brc6enfNc+w_nEhkbdKk8pt--