Author: kensmith
Date: Tue Sep 29 19:57:06 2009
New Revision: 197623
URL: http://svn.freebsd.org/changeset/base/197623
Log:
Update description of debugging support.
Submitted by: ivoras (but heavily modified)
Pointy hat: me
Approved by: re (implicit)
Modified:
stable/8/UPDATING
Modified: stable/8/UPDATING
==============================================================================
--- stable/8/UPDATING Tue Sep 29 19:50:50 2009 (r197622)
+++ stable/8/UPDATING Tue Sep 29 19:57:06 2009 (r197623)
@@ -8,19 +8,12 @@ Items affecting the ports and packages s
/usr/ports/UPDATING. Please read that file before running
portupgrade.
-NOTE TO PEOPLE WHO THINK THAT FreeBSD 8.x IS SLOW:
- FreeBSD 8.x has many debugging features turned on, in
- both the kernel and userland. These features attempt to detect
- incorrect use of system primitives, and encourage loud failure
- through extra sanity checking and fail stop semantics. They
- also substantially impact system performance. If you want to
- do performance measurement, benchmarking, and optimization,
- you'll want to turn them off. This includes various WITNESS-
- related kernel options, INVARIANTS, malloc debugging flags
- in userland, and various verbose features in the kernel. Many
- developers choose to disable these features on build machines
- to maximize performance. (To disable malloc debugging, run
- ln -s aj /etc/malloc.conf.)
+NOTE TO PEOPLE WHO THINK THAT FreeBSD 8.x IS SLOW ON IA64 OR SUN4V:
+ For ia64 the INVARIANTS and INVARIANTS_SUPPORT kernel options
+ were left in the GENERIC kernel because the kernel does not
+ work properly without them. For sun4v all of the normal kernel
+ debugging tools present in HEAD were left in place because
+ sun4v support still needs work to become production ready.
20090929:
802.11s D3.03 support was committed. This is incompatible with
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