diff options
author | gjb <gjb@FreeBSD.org> | 2016-07-08 00:22:14 +0000 |
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committer | gjb <gjb@FreeBSD.org> | 2016-07-08 00:22:14 +0000 |
commit | 4b4118a22b93aea9fe033ece4a0a44a9bf405411 (patch) | |
tree | 6073603139eaf4a1cc9a182b7757b49bd4134b9b /UPDATING | |
parent | 2059ade07524c565049fb16b9b427b9f6a6b6056 (diff) | |
download | FreeBSD-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-- | UPDATING | 15 |
1 files changed, 0 insertions, 15 deletions
@@ -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 |