2.4.x features

[Khyron]

I'm looking for information, either in documentation (!) or
however its available, about the following features in the
2.4.x series kernels:

1. wake-one
2. _syscall4
3. process ID table resizing

Where can I find these documented (no, "the source" isn't a
good answer AFAIAC, even though its true)? Or better, can
anyone answer the following questions about each of these:

A. How do I activate these features? Are they kernel config
   time parameters or standard?
B. How robust is the code implementing these features?

Please feel free to let me know if I have been misled if
#3 isn't an actual feature.

Thanks in advance!

////////////////////////////////////////////////////////////////////
Khyron					    mailto:[e-mail]
Key fingerprint = 53BB 08CA 6A4B 8AF8 DF9B  7E71 2D20 AD30 6684 E82D
			"Drama free in 2001!"
\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\