UPDATING (05641e82d70f51f197ab050b8b46f380baf44edf) UPDATING (bb4f06e701d98c0129a67dd579f09c8c16d55843)
1Updating Information for FreeBSD current users
2
3This file is maintained and copyrighted by M. Warner Losh
4<imp@village.org>. See end of file for further details. For commonly
5done items, please see the COMMON ITEMS: section later in the file.
6
7NOTE TO PEOPLE WHO THINK THAT FreeBSD 5.x IS SLOW:
8 FreeBSD 5.x has many debugging features turned on, in
9 both the kernel and userland. These features attempt to detect
10 incorrect use of system primitives, and encourage loud failure
11 through extra sanity checking and fail stop semantics. They
12 also substantially impact system performance. If you want to
13 do performance measurement, benchmarking, and optimization,
14 you'll want to turn them off. This includes various WITNESS-
15 related kernel options, INVARIANTS, malloc debugging flags
16 in userland, and various verbose features in the kernel. Many
17 developers choose to disable these features on build machines
18 to maximize performance.
19
1Updating Information for FreeBSD current users
2
3This file is maintained and copyrighted by M. Warner Losh
4<imp@village.org>. See end of file for further details. For commonly
5done items, please see the COMMON ITEMS: section later in the file.
6
7NOTE TO PEOPLE WHO THINK THAT FreeBSD 5.x IS SLOW:
8 FreeBSD 5.x has many debugging features turned on, in
9 both the kernel and userland. These features attempt to detect
10 incorrect use of system primitives, and encourage loud failure
11 through extra sanity checking and fail stop semantics. They
12 also substantially impact system performance. If you want to
13 do performance measurement, benchmarking, and optimization,
14 you'll want to turn them off. This includes various WITNESS-
15 related kernel options, INVARIANTS, malloc debugging flags
16 in userland, and various verbose features in the kernel. Many
17 developers choose to disable these features on build machines
18 to maximize performance.
19
2020040423:
21 Due to a new option in ipfw (versrcreach) the ipfw(8) command
22 needs to be recompiled. Normal accept/reject rules without
23 options are not affected but those with options may break until
24 ipfw(8) is recompiled.
25
2020040420:
21 Due to changes in the callout ABI, kernels compiled after this
22 date may be incompatible with kernel modules compiled prior to
23 20040406.
24
2520040414:
26 The PCI bus power state stuff has been turned on. If this causes
27 problems for your system, please disable it using the tunable

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27 Due to changes in the callout ABI, kernels compiled after this
28 date may be incompatible with kernel modules compiled prior to
29 20040406.
30
3120040414:
32 The PCI bus power state stuff has been turned on. If this causes
33 problems for your system, please disable it using the tunable

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