From owner-freebsd-hackers  Sun Jun 25  3:40:46 2000
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Date: Sun, 25 Jun 2000 19:40:44 +0900
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From: Motomichi Matsuzaki <mzaki@e-mail.ne.jp>
To: freebsd-hackers@FreeBSD.ORG
Subject: VM coloring description in NOTES
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Hi.

** this discussion is for i386 architectures **

I think there is some unclearness on the description 
about VM subsystem coloring in NOTES (formerly called LINT).

Currently,

# Options for the VM subsystem
#options        PQ_NOOPT                # No coloring
options         PQ_LARGECACHE           # color for 512k/16k cache
#options        PQ_HUGECACHE            # color for 1024k/16k cache
#options        PQ_MEDIUMCACHE          # color for 64k/16k cache
#options        PQ_NORMALCACHE          # color for 256k/16k cache


But, in /sys/vm/vm_page.h, PQ_PRIME1, PQ_PRIME2, PQ_L2_SIZE are
defined as below.

PQ_NOOPT	defines 1/1/1		to disable coloring
PQ_LARGECACHE	defines 31/23/128	for 512k cache
PQ_HUGECACHE	defines 31/23/256	for 1M cache
PQ_MEDIUMCACHE	defines 13/7/64		for 256k cache
PQ_NORMALCACHE	defines 5/3/16		for 64k cache

and, on the default, these parameters are defined as 9/5/32.

NOTES has obviously incorrect description about MEDIUM and NORMAL
case, and there are no discription about the default coloring.

Yes, this situation arise from its incomprehensive name.
I suggest that these options should be renamed as follows:

currently	->	candidate
PQ_HUGECACHE		PQ_CACHE1024
PQ_LARGECACHE		PQ_CACHE512
PQ_MEDIUMCACHE		PQ_CACHE256
PQ_NORMALCACHE		PQ_CACHE64

and newly PQ_CACHE128 should be defined as default.

Any ideas?

-- 
Motomichi Matsuzaki <mzaki@e-mail.ne.jp> 
Dept. of Biological Sciences, Grad. School of Science, Univ. of Tokyo, Japan 


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