Comment by feverfew

MTE can be enabled in two modes. One is "synchronous": tag checking occurs on the relevant load/store instruction and will raise a segmentation fault immediately in case of a mismatch; this mode is slower but retains information about where the bad memory access was (i.e., hence intended for debugging). The second mode is asynchronous, where any mismatches are only raised after a context switch; this mode has minimal overhead but loses relevant debugging information (i.e., hence intended as a run-time protection).