opnsense-src/sys/modules/geom/geom_zero/Makefile

# $FreeBSD$

.PATH: ${.CURDIR}/../../../geom/zero

KMOD=	geom_zero
SRCS=	g_zero.c

.include <bsd.kmod.mk>
Add a very simple and small GEOM class - ZERO. It creates very huge provider (41PB) /dev/gzero. On BIO_READ request it zero-fills bio_data and on BIO_WRITE it does nothing. You can also set kern.geom.zero.clear sysctl to 0 to do nothing even for BIO_READ. I'm using it for performance testing where it is very helpful. MFC after: 3 days 2005-07-25 06:03:16 -04:00			`# $FreeBSD$`

			`.PATH: ${.CURDIR}/../../../geom/zero`

			`KMOD= geom_zero`
			`SRCS= g_zero.c`

			`.include <bsd.kmod.mk>`