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authorgjb <gjb@FreeBSD.org>2016-07-08 00:22:14 +0000
committergjb <gjb@FreeBSD.org>2016-07-08 00:22:14 +0000
commit4b4118a22b93aea9fe033ece4a0a44a9bf405411 (patch)
tree6073603139eaf4a1cc9a182b7757b49bd4134b9b /UPDATING
parent2059ade07524c565049fb16b9b427b9f6a6b6056 (diff)
downloadFreeBSD-src-4b4118a22b93aea9fe033ece4a0a44a9bf405411.zip
FreeBSD-src-4b4118a22b93aea9fe033ece4a0a44a9bf405411.tar.gz
- Remove debugging from GENERIC* kernel configurations
- Enable MALLOC_PRODUCTION - Default dumpdev=NO - Remove UPDATING entry regarding debugging features Approved by: re (implicit) Sponsored by: The FreeBSD Foundation
Diffstat (limited to 'UPDATING')
-rw-r--r--UPDATING15
1 files changed, 0 insertions, 15 deletions
diff --git a/UPDATING b/UPDATING
index 5d10c53..98cbc06 100644
--- a/UPDATING
+++ b/UPDATING
@@ -16,21 +16,6 @@ from older versions of FreeBSD, try WITHOUT_CLANG and WITH_GCC to bootstrap to
the tip of head, and then rebuild without this option. The bootstrap process
from older version of current across the gcc/clang cutover is a bit fragile.
-NOTE TO PEOPLE WHO THINK THAT FreeBSD 11.x IS SLOW:
- FreeBSD 11.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 completely disable malloc
- debugging, define MALLOC_PRODUCTION in /etc/make.conf, or to merely
- disable the most expensive debugging functionality run
- "ln -s 'abort:false,junk:false' /etc/malloc.conf".)
-
20160622:
The libc stub for the pipe(2) system call has been replaced with
a wrapper which calls the pipe2(2) system call and the pipe(2) is now
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