Re: [Qemu-devel] [RFC v4 00/58] Memory API

[Jan Kiszka <jan.kiszka@siemens.com>]

On 2011-07-20 16:54, Avi Kivity wrote:
> On 07/20/2011 05:37 PM, Michael S. Tsirkin wrote:
>>>
>>>  If you do a memory_region_set_log() immediately after
>>>  memory_region_init_ram(), then as soon as the framebuffer is added
>>>  to the memory hierarchy, it will have logging enabled (or any
>>>  aliases of the framebuffer).
>>
>> Still, I think we should specify logging on/off when region is created,
>> and avoid APIs that tweak dirty logging.
> 
> It's the same thing.
> 
> memory_region_init*();
> // we have a disconnected memory region
> memory_region_set_log();
> // still disconnected, now logged
> 
> I don't want memory_region_init() with 231 parameters.

That's OK. The question is if memory_region_set_log should work on both
invisible AND visible regions. The former makes it a bit-flip service,
the latter requires a larger machinery.


BTW, what's broken is legacy VGA mem dirty logging. Was simply dropped
during the conversion, and now I'm missing some links between vga core
and its users to reestablish it generically.

Jan

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