Created attachment 104930 [details]
bigend

This patch is about virtual space conflict . But this change has been fix in
the mesa-20140607(the version is 10.1.5) ; The new mesa version have a new
problem in our machine .
in founction
struct pipe_resource *r600_resource_create_common(struct pipe_screen *screen,
                                                  const struct pipe_resource
*templ)
{
        if (templ->target == PIPE_BUFFER) {
                return r600_buffer_create(screen, templ, 8192); // original
value is 4096  chen changed 2014-8-19
        } else {
                return r600_texture_create(screen, templ);
        }
}

So, that the virtual address space conflict is disappear.

I am seeing your patch .
https://bugs.freedesktop.org/attachment.cgi?id=104877&action=edit

but i cannot find the "si_update_vertex_buffers" function in our mesa version. 
thinks for your help . i will do many test in our machine.