Date: Fri, 15 Jan 1999 09:30:39 -0800 From: Mike Smith <mike@smith.net.au> To: current@FreeBSD.ORG Subject: New NMBCLUSTERS tuning alternative Message-ID: <199901151730.JAA01141@dingo.cdrom.com>
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With this commit, I'm trialling a simple method for providing tuning
hints for otherwise statically-set parameters from the bootloader.
You can now say:
set kern.ipc.nmbclusters=XXXX
to effectively set NMBCLUSTERS to XXXX.
I've looked at other approaches, particularly a hook in the SYSCTL_*
defines to search the environment and set the variables when the MIB
is instantiated, but this won't happen early enough for some things.
Any suggestions welcome, of course.
------- Forwarded Message
msmith 1999/01/15 09:25:03 PST
Modified files:
sys/i386/i386 machdep.c
Log:
Fetch an overide for NMBCLUSTERS from the kernel environment. Never allow
the value to be reduced below that defined when the kernel was built.
Revision Changes Path
1.322 +7 -1 src/sys/i386/i386/machdep.c
Modified files:
sys/kern kern_environment.c
sys/sys systm.h
Log:
Add getenv_int(), specifically for retrieving integer values from kernel
environment variables. This makes it easy to pass tuning parameters
in from the bootloader.
Revision Changes Path
1.4 +20 -1 src/sys/kern/kern_environment.c
1.84 +2 -1 src/sys/sys/systm.h
------- End of Forwarded Message
--
\\ Sometimes you're ahead, \\ Mike Smith
\\ sometimes you're behind. \\ mike@smith.net.au
\\ The race is long, and in the \\ msmith@freebsd.org
\\ end it's only with yourself. \\ msmith@cdrom.com
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