linux-kernel - Re: Cannot boot xen DomU

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Date:	Thu, 17 Jan 2008 09:15:14 -0800
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	xming <xmingske@...il.com>
CC:	linux-kernel@...r.kernel.org
Subject: Re: Cannot boot xen DomU > 2.6.23.1

xming wrote:
> Hi,
>
> I finally found the piece of code that prevents me from booting Xen DomU
> with vallina kernel > 2.6.23.1.
>
> The problem is that with every kernel (> 2.6.32.1 including 2.6.24 RCs)
> will just hang with "too much" console activity. Sometimes (well most
> of the time) boot msg is too much. When I can boot into the kernel,
> generating a lots of cosole out it will hang, no oops, no more
> console/network. Generating with the same way through ssh will not
> hang the domU.
>
> When I reverse the following patch, things work as before, tried this
> with 2.6.23.14 and 2.6.14-rc8. But I don't have the knowledge to
> understand the reason behind this.
>   

Uh, that's very strange.  That patch fixes an outright bug, unless 
you're using one specific changeset out of the xen-unstable mercurial 
tree.  What version of Xen are you using?  Is it one you've built from 
xenbits, or distributed by someone?  Are you using a 32 or 64 bit xen/dom0?

I don't understand where the "too much console activity" message comes 
from.  Could you post an actual cut'n'paste of the message, or a 
screenshot?  Are you using a serial console on your dom0?

Thanks,
    J

> BTW, I am not subscribed.
>
> --- a/include/xen/interface/vcpu.h
> +++ b/include/xen/interface/vcpu.h
> @@ -160,8 +160,9 @@ struct vcpu_set_singleshot_timer {
>   */
>  #define VCPUOP_register_vcpu_info   10  /* arg == struct vcpu_info */
>  struct vcpu_register_vcpu_info {
> -    uint32_t mfn;               /* mfn of page to place vcpu_info */
> -    uint32_t offset;            /* offset within page */
> +    uint64_t mfn;    /* mfn of page to place vcpu_info */
> +    uint32_t offset; /* offset within page */
> +    uint32_t rsvd;   /* unused */
>  };
>
>  #endif /* __XEN_PUBLIC_VCPU_H__ */
>
> I am running Xen 3.1.2 PAE
>
> # uname -a
> Linux builder 2.6.24-rc8 #2 SMP Thu Jan 17 16:37:19 CET 2008 i686
> AMD Athlon(tm) X2 Dual Core Processor BE-2300 AuthenticAMD GNU/Linux
>
> # cat /proc/cpuinfo
> processor       : 0
> vendor_id       : AuthenticAMD
> cpu family      : 15
> model           : 107
> model name      : AMD Athlon(tm) X2 Dual Core Processor BE-2300
> stepping        : 1
> cpu MHz         : 1899.930
> cache size      : 512 KB
> physical id     : 0
> siblings        : 2
> core id         : 1
> cpu cores       : 2
> fdiv_bug        : no
> hlt_bug         : no
> f00f_bug        : no
> coma_bug        : no
> fpu             : yes
> fpu_exception   : yes
> cpuid level     : 1
> wp              : yes
> flags           : fpu tsc msr pae mce cx8 mca cmov pat pse36 clflush
> mmx fxsr sse sse2 ht nx mmxext fxsr_opt lm 3dnowext 3dnow pni cx16
> lahf_lm cmp_legacy svm extapic cr8_legacy 3dnowprefetch ts fid vid ttp
> tm stc 100mhzsteps
> bogomips        : 3829.72
> clflush size    : 64
>
> processor       : 1
> vendor_id       : AuthenticAMD
> cpu family      : 15
> model           : 107
> model name      : AMD Athlon(tm) X2 Dual Core Processor BE-2300
> stepping        : 1
> cpu MHz         : 1899.930
> cache size      : 512 KB
> physical id     : 0
> siblings        : 2
> core id         : 1
> cpu cores       : 2
> fdiv_bug        : no
> hlt_bug         : no
> f00f_bug        : no
> coma_bug        : no
> fpu             : yes
> fpu_exception   : yes
> cpuid level     : 1
> wp              : yes
> flags           : fpu tsc msr pae mce cx8 mca cmov pat pse36 clflush
> mmx fxsr sse sse2 ht nx mmxext fxsr_opt lm 3dnowext 3dnow pni cx16
> lahf_lm cmp_legacy svm extapic cr8_legacy 3dnowprefetch ts fid vid ttp
> tm stc 100mhzsteps
> bogomips        : 3829.72
> clflush size    : 64
> --
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