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Re: [Qemu-devel] [PATCH 03/29] display: enable DIRTY_MEMORY_VGA tracking

From: Paolo Bonzini
Subject: Re: [Qemu-devel] [PATCH 03/29] display: enable DIRTY_MEMORY_VGA tracking explicitly
Date: Tue, 26 May 2015 14:10:15 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.6.0

On 26/05/2015 14:08, Peter Maydell wrote:
>>> >> Could you provide some explanation/documentation of when a
>>> >> display device needs to set DIRTY_MEMORY_VGA (and when it
>>> >> doesn't)?
>> >
>> > It needs to set it if it uses memory_region_get/set/clear_dirty with
>> > DIRTY_MEMORY_VGA as the last argument.
> OK, and which devices need to do that?

Those that care to optimize their update_display callback.  It's
entirely opt in.


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