Date: Sat, 20 Mar 2010 15:30:26 +0000 (UTC) From: Alexander Motin <mav@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r205384 - head/sys/conf Message-ID: <201003201530.o2KFUQ64013244@svn.freebsd.org>
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Author: mav Date: Sat Mar 20 15:30:26 2010 New Revision: 205384 URL: http://svn.freebsd.org/changeset/base/205384 Log: Correct MAXPHYS and DFLTPHYS description. Modified: head/sys/conf/NOTES Modified: head/sys/conf/NOTES ============================================================================== --- head/sys/conf/NOTES Sat Mar 20 15:28:39 2010 (r205383) +++ head/sys/conf/NOTES Sat Mar 20 15:30:26 2010 (r205384) @@ -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. #
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