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Make MAXPHYS and DFLTPHYS options (finally).

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This commit is contained in:
Matt Jacob 2006-12-10 04:23:23 +00:00
parent 4d249371ce
commit f9fbd1a4bc
2 changed files with 17 additions and 0 deletions
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15
sys/conf/NOTES
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@ -110,6 +110,21 @@ options DFLDSIZ=(1024UL*1024*1024)
#
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

2
sys/conf/options
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@ -535,6 +535,8 @@ ENABLE_ALART opt_intpm.h
# 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