The code to compute slice_quota seems buggy. The following fixes the issue:
--- new.orig/include/qemu/ratelimit.h 2012-10-22 07:06:31.000000000 +0200
+++ new/include/qemu/ratelimit.h 2012-10-22 07:06:49.000000000 +0200
@@ -42,7 +42,7 @@
uint64_t slice_ns)
{
limit->slice_ns = slice_ns;
- limit->slice_quota = ((double)speed * 1000000000ULL) / slice_ns;
+ limit->slice_quota = ((double)speed * slice_ns)/1000000000ULL;
}
#endif
