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Re: [Qemu-devel] [PATCH v2] migration: skip sending ram pages released b


From: Paolo Bonzini
Subject: Re: [Qemu-devel] [PATCH v2] migration: skip sending ram pages released by virtio-balloon driver.
Date: Tue, 29 Mar 2016 12:48:27 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.6.0


On 29/03/2016 12:47, Jitendra Kolhe wrote:
> > Indeed.  It is correct for the main system RAM, but hot-plugged RAM
> > would also have a zero-based section.offset_within_region.  You need to
> > add memory_region_get_ram_addr(section.mr), just like the call to
> > balloon_page adds memory_region_get_ram_ptr(section.mr).
> > 
> > Paolo
> 
> I am only interested in the offset from memory region base. 
> Would below guest PA to host offset work, as we do in
> address_space_translate_internal()?
> (Guest pa - section.offset_within_address_space + 
> section.offset_within_region)

Yes, that would work.  But I'm not sure why you're not interested in the
ram_addr_t.

Paolo



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