From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jiageng Yu <yujiageng734@gmail.com>
Subject: Re: apic probe of 2.6.32.41 pv linux
Date: Fri, 27 May 2011 22:44:05 +0800
Message-ID: <BANLkTinydmZz5z+oiJGdjMDOtAd87Ooh2w@mail.gmail.com>
References: <BANLkTimUY4cLyZeff=N4tRU+1c3=KimTSw@mail.gmail.com>
	<20110527135756.GB6734@dumpdata.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: quoted-printable
Return-path: <xen-devel-bounces@lists.xensource.com>
In-Reply-To: <20110527135756.GB6734@dumpdata.com>
List-Unsubscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>,
	<mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
List-Post: <mailto:xen-devel@lists.xensource.com>
List-Help: <mailto:xen-devel-request@lists.xensource.com?subject=help>
List-Subscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>,
	<mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
Sender: xen-devel-bounces@lists.xensource.com
Errors-To: xen-devel-bounces@lists.xensource.com
To: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>, Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Cc: Xen-devel@lists.xensource.com
List-Id: xen-devel@lists.xenproject.org

2011/5/27 Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>:
> On Fri, May 27, 2011 at 05:58:51PM +0800, Jiageng Yu wrote:
>> I have updated the pv linux kernel from 2.6.32.40 to 2.6.32.41. I
>> found the generic_apic_probe always led to a kernel panic when I try
>> to make the minimal DomU kernel.
>>
>> The 2.6.32.41 pv linux use the new apic probe mechanism:
>
> new..? What was it before?


The linux kernel will invoke probe_default, which permanently returns 1.
I wander to know may I just return 1 in 2.6.32.41 kernel? If there is
no further problems.


>>
>> static __init int xen_safe_probe(void) {
>> =C2=A0 =C2=A0 =C2=A0 =C2=A0 if (!xen_initial_domain())
>> =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 return 0;
>> =C2=A0 =C2=A0 =C2=A0 =C2=A0 return 1;
>> }
>>
>> #ifdef CONFIG_XEN_DOM0
>> #define xen_initial_domain() =C2=A0 =C2=A0(xen_pv_domain() && xen_start_=
info->flags
>> & SIF_INITDOMAIN)
>> #else =C2=A0/* !CONFIG_XEN_DOM0 */
>> #define xen_initial_domain() =C2=A0 =C2=A0(0)
>> #endif =C2=A0/* CONFIG_XEN_DOM0 */
>>
>>
>> If do not define the CONFIG_XEN_DOM0, xen_safe_probe will always
>> return 0 which causes the kernel panic. For the minimal DomU kernel,
>> the CONFIG_XEN_DOM0 is needless, and in this scenario, how to pass the
>> apic probe safely?
>
>>
>> Thanks!
>>
>> _______________________________________________
>> Xen-devel mailing list
>> Xen-devel@lists.xensource.com
>> http://lists.xensource.com/xen-devel
>