Date: Fri, 10 Jan 2003 04:53:06 +0900 (JST) From: Hiroyuki CHIBA <hiro@bisd.hitachi.co.jp> To: joe@removethis.rainbowsheep.net, current@freebsd.org Cc: hiro@bisd.hitachi.co.jp Subject: Re: upgrading to CURRENT from STABLE Message-ID: <20030110045306U.hiro@bisd.hitachi.co.jp> In-Reply-To: <3E1DCBFF.9080306@removethis.rainbowsheep.net> References: <3E1DCBFF.9080306@removethis.rainbowsheep.net>
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Hi,
>>>>> On Thu, 09 Jan 2003 11:22:39 -0800,
Joe Laughlin <joe@removethis.rainbowsheep.net> said
about: upgrading to CURRENT from STABLE:
joe> In the UPDATING file, the following is noted:
joe> FreeBSD 5.0-CURRENT has many debugging features turned on, in
joe> both the kernel and userland. These features attempt to detect
joe> incorrect use of system primitives, and encourage loud failure
joe> through extra sanity checking and fail stop semantics. They
joe> also substantially impact system performance. If you want to
joe> do performance measurement, benchmarking, and optimization,
joe> you'll want to turn them off.
joe> How do I turn them off?
The document says:
This includes
1) various WITNESS-related kernel options,
2) INVARIANTS,
3) malloc debugging flags in userland, and
4) various verbose features in the kernel.
For 1), 2)
You can find the comment as "Debugging for use in -current" in
/usr/src/sys/i386/conf/GENERIC.
For 3)
see TUNING in malloc(3)
For 4)
You may find them in UPDATING items (newer than base system)
or
Other options may be found by "sysctl -a" , I think.
and read COMMON ITEMS at end of UPDATING.
Regards,
----
Hiroyuki CHIBA: hiro@bisd.hitachi.co.jp/clin@imasy.org
Security Solution Promoting Division, Hitachi,Ltd.
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