Bring in geom_sched, support for scheduling disk I/O requests

in a device independent manner. Also include an example anticipatory
scheduler, gsched_rr, which gives very nice performance improvements
in presence of competing random access patterns.

This is joint work with Fabio Checconi, developed last year
and presented at BSDCan 2009. You can find details in the
README file or at

http://info.iet.unipi.it/~luigi/geom_sched/

5 files changed, 30 insertions, 0 deletions

diff --git a/sys/modules/geom/Makefile b/sys/modules/geom/Makefile
index abce379..0b2e3e8 100644
--- a/sys/modules/geom/Makefile
+++ b/sys/modules/geom/Makefile
@@ -19,6 +19,7 @@ SUBDIR=	geom_bde \
 	geom_part \
 	geom_pc98 \
 	geom_raid3 \
+	geom_sched \
 	geom_shsec \
 	geom_stripe \
 	geom_sunlabel \
diff --git a/sys/modules/geom/geom_sched/Makefile b/sys/modules/geom/geom_sched/Makefile
new file mode 100644
index 0000000..5937fa0
--- /dev/null
+++ b/sys/modules/geom/geom_sched/Makefile
@@ -0,0 +1,5 @@
+# $FreeBSD$
+
+SUBDIR=	gs_sched gsched_rr
+
+.include <bsd.subdir.mk>
diff --git a/sys/modules/geom/geom_sched/Makefile.inc b/sys/modules/geom/geom_sched/Makefile.inc
new file mode 100644
index 0000000..808d6eb
--- /dev/null
+++ b/sys/modules/geom/geom_sched/Makefile.inc
@@ -0,0 +1,9 @@
+# $FreeBSD$
+# included by geom_sched children
+
+.PATH: ${.CURDIR}/../../../../geom/sched
+
+# 6.x needs this path
+#CFLAGS += -I${.CURDIR}/../../../../geom/sched
+
+# .include <bsd.kmod.mk>
diff --git a/sys/modules/geom/geom_sched/gs_sched/Makefile b/sys/modules/geom/geom_sched/gs_sched/Makefile
new file mode 100644
index 0000000..5739365
--- /dev/null
+++ b/sys/modules/geom/geom_sched/gs_sched/Makefile
@@ -0,0 +1,6 @@
+# $FreeBSD$
+KMOD=   geom_sched
+SRCS=   g_sched.c subr_disk.c
+
+# ../Makefile.inc automatically included
+.include <bsd.kmod.mk>
diff --git a/sys/modules/geom/geom_sched/gsched_rr/Makefile b/sys/modules/geom/geom_sched/gsched_rr/Makefile
new file mode 100644
index 0000000..4209277
--- /dev/null
+++ b/sys/modules/geom/geom_sched/gsched_rr/Makefile
@@ -0,0 +1,9 @@
+# $FreeBSD$
+
+KMOD=   gsched_rr
+SRCS=   gs_rr.c
+# hash.h on 6.x has a (char *) cast on a const pointer
+#CWARNFLAGS=
+
+# ../Makefile.inc automatically included
+.include <bsd.kmod.mk>