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[Xen-devel] RE: [PATCH] calling zap_low_mappings breaks xen boot on the es7000

  • To: "Keir Fraser" <Keir.Fraser@xxxxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • From: "Subrahmanian, Raj" <raj.subrahmanian@xxxxxxxxxx>
  • Date: Wed, 23 May 2007 17:16:47 -0400
  • Delivery-date: Wed, 23 May 2007 14:15:08 -0700
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
  • Thread-index: AceWvpt92gNeWwKxEdy09AAWy6hiGQCvyjGgABwt3PsA5BuyYA==
  • Thread-topic: [PATCH] calling zap_low_mappings breaks xen boot on the es7000

>-----Original Message-----
>From: Keir Fraser [mailto:Keir.Fraser@xxxxxxxxxxxx] 
>Sent: Saturday, May 19, 2007 4:20 AM
>To: Subrahmanian, Raj; xen-devel@xxxxxxxxxxxxxxxxxxx
>Subject: Re: [PATCH] calling zap_low_mappings breaks xen boot 
>on the es7000
>> All,
>> Changeset 15044 fixes zap_low_mappings, and calls it from setup.c if 
>> on a x86_64 box.
>> This zaps some of the memory the ES7000 uses to talk to the Server 
>> Control (to setup APICs, for instance).
>> This patch executes the zap_low_mappings only if not on an ES7000.
>> Signed-off-by: Rajagopalan Subrahmanian <raj.subrahmanian@xxxxxxxxxx>
>> Thanks
>> Raj
>Either we should just delay the zap_low_mappings() call, or 
>fix your code to map_domain_page()/unmap_domain_page(). How 
>late in boot do you need the low mappings?

This patch delays the zap_low_mappings() call until after the
smp_prepare_cpus call. With this patch, I am able to run Xen on the
ES7000 and a Dell SC 1430.


Attachment: delayzap.patch
Description: delayzap.patch

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