Change swapping policy to be a bit more aggressive about finding a
candidate for swapout. Increased default RSS limit to a minimum of 2MB.

Implemented swap locking via P_SWAPPING flag. It was possible for a process
to be chosen for swap-in while it was being swapped-out. This was BAD.

Submitted by: John Dyson

Cosmetics: unused vars, ()'s, #include's &c &c to silence gcc.
Reviewed by: davidg

Fixed a bug I introduced when fixing the rss limit code. Changed swapout
policy to be a bit more selective about what processes get swapped out.

Reviewed by: John Dyson

Fix up some sloppy coding practices:

- Delete redundant declarations.
- Add -Wredundant-declarations to Makefile.i386 so they don't come back.
- Delete sloppy COMMON-style declarations of uninitiali

Fix up some sloppy coding practices:

- Delete redundant declarations.
- Add -Wredundant-declarations to Makefile.i386 so they don't come back.
- Delete sloppy COMMON-style declarations of uninitialized data in
header files.
- Add a few prototypes.
- Clean up warnings resulting from the above.

NB: ioconf.c will still generate a redundant-declaration warning, which
is unavoidable unless somebody volunteers to make `config' smarter.

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Removed an old, obsolete call to vmmeter(). This is called now in the
schedcpu() routine in kern/kern_synch.c. This extra call to vmmeter() in
vm_glue.c was what was totally messing up the load avera

Removed an old, obsolete call to vmmeter(). This is called now in the
schedcpu() routine in kern/kern_synch.c. This extra call to vmmeter() in
vm_glue.c was what was totally messing up the load average calculations.

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Integrated VM system improvements/fixes from FreeBSD-1.1.5.

Added $Id$

The big 4.4BSD Lite to FreeBSD 2.0.0 (Development) patch.

Reviewed by: Rodney W. Grimes
Submitted by: John Dyson and David Greenman

BSD 4.4 Lite Kernel Sources