_M_IPF
# define KMALLOC(a, b) (a) = (b)malloc(sizeof(*(a)), _M_IPF, M_NOWAIT)
# define KMALLOCS(a, b, c) (a) = (b)malloc((c), _M_IPF, M_NOWAIT)
# define KFREE(x) free((x), _M_IPF)
# define KFREES(x,s) free((x), _M_IPF)