Re: apic probe of 2.6.32.41 pv linux

[Jiageng Yu <yujiageng734@gmail.com>]

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) {
>>         if (!xen_initial_domain())
>>                 return 0;
>>         return 1;
>> }
>>
>> #ifdef CONFIG_XEN_DOM0
>> #define xen_initial_domain()    (xen_pv_domain() && xen_start_info->flags
>> & SIF_INITDOMAIN)
>> #else  /* !CONFIG_XEN_DOM0 */
>> #define xen_initial_domain()    (0)
>> #endif  /* 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!
>>
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>