Add XBZRLE to ram_save_block and ram_save_live
In the outgoing migration check to see if the page is cached and changed, then send compressed page by using save_xbrle_page function. In the incoming migration check to see if RAM_SAVE_FLAG_XBZRLE is set and decompress the page (by using load_xbrle function). Signed-off-by: NBenoit Hudzia <benoit.hudzia@sap.com> Signed-off-by: NPetter Svard <petters@cs.umu.se> Signed-off-by: NAidan Shribman <aidan.shribman@sap.com> Signed-off-by: NOrit Wasserman <owasserm@redhat.com> Reviewed-by: NLuiz Capitulino <lcapitulino@redhat.com> Reviewed-by: NEric Blake <eblake@redhat.com>
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