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[Xen-devel] RE: 32-bit Xen disabled buffered IO for HVM guest' VGA. Why?

To: "Keir Fraser" <Keir.Fraser@xxxxxxxxxxxx>, "Robert Phillips" <rphillips@xxxxxxxxxxxxxxx>, "Ben Guthro" <bguthro@xxxxxxxxxxxxxxx>
Subject: [Xen-devel] RE: 32-bit Xen disabled buffered IO for HVM guest' VGA. Why?
From: "Cui, Dexuan" <dexuan.cui@xxxxxxxxx>
Date: Fri, 16 Nov 2007 19:52:54 +0800
Cc: xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, "You, Yongkang" <yongkang.you@xxxxxxxxx>
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Thread-topic: 32-bit Xen disabled buffered IO for HVM guest' VGA. Why?
Keir Fraser wrote:
> On 15/11/07 10:28, "Cui, Dexuan" <dexuan.cui@xxxxxxxxx> wrote:
> 
>> If this is a bug introduced by c/s 16240, we should fix it ASAP,
>> because: Now, in 32-bit Xen, we have no any buffering at all,
>> causing the bug 1102; and if you use grub's splashimage, you would
>> find nobody can tolerate the rather poor VGA performance....
> 
> It's on my todo list. It's not hard to fix this.

Well, I attached a patch. Please apply it.

Thanks!
-- Dexuan

Attachment: enable_vga_buffering.patch
Description: enable_vga_buffering.patch

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