on X86 architecture u can refer to " Intel® 64 and IA-32 Architectures Software Developer's Manual Volume 3A: System Programming Guide" chapter 11 memory cache control 11.5.5 Cache Management instructions. CLFLUSH BRs, Lin -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ