Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752545AbaL2BSt (ORCPT ); Sun, 28 Dec 2014 20:18:49 -0500 Received: from cn.fujitsu.com ([59.151.112.132]:17109 "EHLO heian.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1752092AbaL2BSq convert rfc822-to-8bit (ORCPT ); Sun, 28 Dec 2014 20:18:46 -0500 X-IronPort-AV: E=Sophos;i="5.04,848,1406563200"; d="scan'208";a="54798274" Message-ID: <54A0ABEF.1000106@cn.fujitsu.com> Date: Mon, 29 Dec 2014 09:18:39 +0800 From: Qu Wenruo User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.3.0 MIME-Version: 1.0 To: Juergen Gross CC: Subject: Re: [REGRESSION][x86] Commit f5b2831d65 cause boot failure in VMware ESXi 5.1 guest References: <549CC096.3080701@cn.fujitsu.com> <549EB95F.9090209@suse.com> In-Reply-To: <549EB95F.9090209@suse.com> Content-Type: text/plain; charset="utf-8"; format=flowed Content-Transfer-Encoding: 8BIT X-Originating-IP: [10.167.226.33] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org -------- Original Message -------- Subject: Re: [REGRESSION][x86] Commit f5b2831d65 cause boot failure in VMware ESXi 5.1 guest From: Juergen Gross To: Qu Wenruo Date: 2014年12月27日 21:51 > On 12/26/2014 02:57 AM, Qu Wenruo wrote: >> Hi all, >> >> When testing v3.19-rc1 kernel(in fact, try to test), the kernel itself >> fail to boot on VMware ESXi 5.1 guest. >> The boot failure is quite easy to describe, only one line is output: >> "Probing EDD (edd=off to disable)...ok" >> >> No other output(including warning/bug_on/backtrace or whatever) and the >> guest just hangs. >> It's OK on v3.18, so it's a regression. >> >> Bisect points to the following commit: >> commit f5b2831d654167d77da8afbef4d2584897b12d0c >> Author: Juergen Gross >> Date: Mon Nov 3 14:02:02 2014 +0100 >> >> x86: Respect PAT bit when copying pte values between large and >> normal pages >> >> The PAT bit in the ptes is not moved to the correct position when >> copying page protection attributes between entries of different >> sized >> pages. Translate the ptes according to their page size. >> >> >> I have also created the kernel BZ report: >> https://bugzilla.kernel.org/show_bug.cgi?id=90321 >> >> Hopes this can be resolved in next rc. > > As the same issue has been reported with VMWare workstation which was > related to an error in the PAT MSR emulation of VMWare, I guess this > will be the same problem. I've already sent a patch. > > You should be able to boot with the "nopat" kernel option. > > > Juergen Thanks for the explanation. Again the closed source blob to blame. Anyway, the nopat option works. Great thanks Qu -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/