From mboxrd@z Thu Jan  1 00:00:00 1970
From: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Subject: Re: [PATCH v5 6/9] libxc: create unmapped initrd in
 domain builder if supported
Date: Wed, 25 Nov 2015 11:34:47 -0500
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To: Ian Campbell <ian.campbell@citrix.com>, Wei Liu <wei.liu2@citrix.com>
Cc: Juergen Gross <jgross@suse.com>, stefano.stabellini@eu.citrix.com, ian.jackson@eu.citrix.com, roger.pau@citrix.com, xen-devel@lists.xen.org
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On 11/25/2015 11:29 AM, Ian Campbell wrote:
> On Wed, 2015-11-25 at 16:18 +0000, Wei Liu wrote:
>> On Wed, Nov 25, 2015 at 11:12:12AM -0500, Boris Ostrovsky wrote:
>>> On 11/12/2015 08:43 AM, Juergen Gross wrote:
>>>> In case the kernel of a new pv-domU indicates it is supporting an
>>>> unmapped initrd, don't waste precious virtual space for the initrd,
>>>> but allocate only guest physical memory for it.
>>> This patch breaks 32-bit pygrub.
>>>
>> This particular patch?
>>
>> We discovered a bug in mini-os that caused 32-bit pygrub to break withi
>> this series. It's now fixed in mini-os upstream.  Check Config.mk for
>> mini-os commit that fixes the bug.
> Are we really talking about pygrub here, or pvgrub? (the former is
> unaffected by mini-os).

That's exactly what confused me into thinking earlier that the fix that 
Wei is talking about would resolve my problem.

It's pYgrub.

>
> If we are really talking about pygrub then we are _actually_ talking about
> the domain builder when operating on the RHEL5 kernel+initrd -- the fact
> ithat they were extracted from the guest filesystem by pygrub is
> irrelevant.
>
>>> With RHEL5 I get
>>>       initrd extends beyond end of memory (0x780080eda000 > 0x40000000)
> This is reported within the guest, right?


Right. I don't have RHEL5 sources to see what exactly the code is doing 
but if it prints what it says it does ;-) then the address looks pretty 
bogus.

-boris