linux-kernel - Re: [Xen-devel] [PATCH 2/3] xen: eliminate scalability issues from initrd handling

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Message-ID: <54096E8A.6010904@suse.com>
Date:	Fri, 05 Sep 2014 10:04:26 +0200
From:	Juergen Gross <jgross@...e.com>
To:	David Vrabel <david.vrabel@...rix.com>,
	Jan Beulich <JBeulich@...e.com>
CC:	boris.ostrovsky@...cle.com, xen-devel@...ts.xensource.com,
	linux-kernel@...r.kernel.org
Subject: Re: [Xen-devel] [PATCH 2/3] xen: eliminate scalability issues from
 initrd handling

On 09/04/2014 04:53 PM, David Vrabel wrote:
> On 04/09/14 15:29, Jan Beulich wrote:
>>>>> On 04.09.14 at 14:52, <david.vrabel@...rix.com> wrote:
>>> On 04/09/14 13:38, Juergen Gross wrote:
>>>> --- a/arch/x86/xen/xen-head.S
>>>> +++ b/arch/x86/xen/xen-head.S
>>>> @@ -124,6 +124,9 @@ NEXT_HYPERCALL(arch_6)
>>>>   	ELFNOTE(Xen, XEN_ELFNOTE_L1_MFN_VALID,
>>>>   		.quad _PAGE_PRESENT; .quad _PAGE_PRESENT)
>>>>   	ELFNOTE(Xen, XEN_ELFNOTE_SUSPEND_CANCEL, .long 1)
>>>> +#ifdef CONFIG_X86_64
>>>> +	ELFNOTE(Xen, XEN_ELFNOTE_MOD_START_PFN,  .long 1)
>>>> +#endif
>>>
>>> Why X86_64 only?  If there's a good reason the commit message needs to
>>> explain why.
>>
>> Does native 32-bit support huge initrd?
>
> Does that matter? If the MOD_START_PFN options works with a 32-bit guest
> then it should use it, regardless of whether it is essential or not.
> Because this reduces the #ifdef'ery.

Okay, I'll verify it's working on 32-bit, too.


Juergen

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