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Re: [Qemu-devel] vga optmization
From: |
Stefano Stabellini |
Subject: |
Re: [Qemu-devel] vga optmization |
Date: |
Tue, 04 Nov 2008 15:01:21 +0000 |
User-agent: |
Thunderbird 2.0.0.14 (X11/20080505) |
Avi Kivity wrote:
> Stefano Stabellini wrote:
>> Why don't you make qemu_physical_sync_dirty_bitmap take also and end
>> address, and you merge the two bitmaps in this address range in this
>> function, so you don't have to change cpu_physical_memory_get_dirty at
>> all?
>>
>> I am saying to do something like:
>>
>> void qemu_physical_sync_dirty_bitmap(ram_addr_t start_addr, ram_addr_t
>> end_addr)
>> {
>> /* sync and merge the two bitmaps between start_addr and end_addr */
>> }
>>
>> then leave cpu_physical_memory_get_dirty untouched.
>> I would prefer this approch, it also leaves more space to other
>> optimizations.
>>
>
> That's how current kvm userspace works. It's also more correct, since
> the kvm bitmap feeds both the vga dirty bits and the live migration
> dirty bits.
>
That's also how currently qemu-xen works.
I am glad that we agree :)
- Re: [Qemu-devel] vga optmization, (continued)
- Re: [Qemu-devel] vga optmization, Avi Kivity, 2008/11/04
- Re: [Qemu-devel] vga optmization, andrzej zaborowski, 2008/11/04
- Re: [Qemu-devel] vga optmization, Stefano Stabellini, 2008/11/04
- Re: [Qemu-devel] vga optmization, Glauber Costa, 2008/11/04
- Re: [Qemu-devel] vga optmization, Avi Kivity, 2008/11/04
- Re: [Qemu-devel] vga optmization, Anthony Liguori, 2008/11/04
- Re: [Qemu-devel] vga optmization, Glauber Costa, 2008/11/04
- Re: [Qemu-devel] vga optmization, Stefano Stabellini, 2008/11/04
- Re: [Qemu-devel] vga optmization, Avi Kivity, 2008/11/04
- Re: [Qemu-devel] vga optmization, Anthony Liguori, 2008/11/04
- Re: [Qemu-devel] vga optmization,
Stefano Stabellini <=
- Re: [Qemu-devel] vga optmization, Glauber Costa, 2008/11/04
- Re: [Qemu-devel] vga optmization, Anthony Liguori, 2008/11/04
- Re: [Qemu-devel] vga optmization, Stefano Stabellini, 2008/11/05
- Re: [Qemu-devel] vga optmization, Glauber Costa, 2008/11/07
- Re: [Qemu-devel] vga optmization, Stefano Stabellini, 2008/11/07