Hi Li, > To get rid of TBROK on small box: > hugemmap05.c:88: BROK: mmap((nil),201326592,3,1,6,0) failed: ENOMEM (12) > And, reduce the reserved testing huge pages to 2, it also works well. Reviewed-by: Petr Vorel <pvorel@suse.cz> Nice speedup :) Maybe add some constant for size (2), as it's used on 3 places? Kind regards, Petr