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Re: [Qemu-devel] [PATCH v3 5/6] vga: Use linear mapping + dirty logging


From: Avi Kivity
Subject: Re: [Qemu-devel] [PATCH v3 5/6] vga: Use linear mapping + dirty logging in chain 4 memory access mode
Date: Thu, 25 Aug 2011 14:19:03 +0300
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:6.0) Gecko/20110816 Thunderbird/6.0

On 08/25/2011 01:51 PM, Jan Kiszka wrote:
>
>  Plain F15 is slow.  SR2 = SR4 = 0.

So it's not using chain4 mode. Can you check what mode the adapter is
actually in and how VRAM is accessed? Likely, there is nothing we can do
about it. /me just wonders what makes F15 grub behave differently from
other distro's versions...


Do you remember offhand which registers I need to look at?

We need a collection of gdb scripts to find a qdev, dump the memory hierarchy, look up gpas, and get info about specific devices.

--
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.




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