PERFORCE change 111368 for review

[Matt Jacob]

http://perforce.freebsd.org/chv.cgi?CH=111368

Change 111368 by mjacob at newisp on 2006/12/10 05:34:27

	IFC2

Affected files ...

.. //depot/projects/newisp/conf/NOTES#17 integrate
.. //depot/projects/newisp/conf/options#11 integrate

Differences ...

==== //depot/projects/newisp/conf/NOTES#17 (text+ko) ====

@@ -1,4 +1,4 @@
-# $FreeBSD: src/sys/conf/NOTES,v 1.1400 2006/11/15 09:13:24 maxim Exp $
+# $FreeBSD: src/sys/conf/NOTES,v 1.1401 2006/12/10 04:23:23 mjacob Exp $
 #
 # NOTES -- Lines that can be cut/pasted into kernel and hints configs.
 #
@@ -110,6 +110,21 @@
 #
 options 	BLKDEV_IOSIZE=8192
 
+#
+# MAXPHYS and DFLTPHYS
+#
+# These are the max and default 'raw' I/O block device access sizes.
+# Reads and writes will be split into DFLTPHYS chunks. Some applications
+# have better performance with larger raw I/O access sizes. Typically
+# MAXPHYS should be twice the size of DFLTPHYS. Note that certain VM
+# parameters are derived from these values and making them too large
+# can make an an unbootable kernel.
+#
+# The defaults are 64K and 128K respectively.
+options 	DFLTPHYS=(64*1024)
+options 	MAXPHYS=(128*1024)
+
+
 # Options for the VM subsystem
 # Deprecated options supported for backwards compatibility
 #options 	PQ_NOOPT		# No coloring

==== //depot/projects/newisp/conf/options#11 (text+ko) ====

@@ -1,4 +1,4 @@
-# $FreeBSD: src/sys/conf/options,v 1.566 2006/11/30 04:17:04 jb Exp $
+# $FreeBSD: src/sys/conf/options,v 1.567 2006/12/10 04:23:23 mjacob Exp $
 #
 #        On the handling of kernel options
 #
@@ -535,6 +535,8 @@
 
 # These cause changes all over the kernel
 BLKDEV_IOSIZE		opt_global.h
+MAXPHYS 		opt_global.h
+DFLTPHYS		opt_global.h
 BURN_BRIDGES		opt_global.h
 DEBUG			opt_global.h
 DEBUG_LOCKS		opt_global.h