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Correct MAXPHYS and DFLTPHYS description.

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mav 2010-03-20 15:30:26 +00:00
parent 9cc3706fd5
commit 73dc33cf71
1 changed files with 4 additions and 4 deletions
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8
sys/conf/NOTES
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@ -122,10 +122,10 @@ 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
# These are the maximal and safe 'raw' I/O block device access sizes.
# Reads and writes will be split into MAXPHYS chunks for known good
# devices and DFLTPHYS for the rest. Some applications have better
# performance with larger raw I/O access sizes. Note that certain VM
# parameters are derived from these values and making them too large
# can make an an unbootable kernel.
#