Subject: Re: New features in NetBSD 2.0
To: Daniel de Kok <email@example.com>
From: SODA Noriyuki <firstname.lastname@example.org>
Date: 10/13/2004 07:25:43
>>>>> On Wed, 13 Oct 2004 00:03:03 +0200,
Daniel de Kok <email@example.com> said:
> How about this?
+ The memory allocation scheme for the buffer cache, which
+ is used for file system meta data, has been rewritten. The
+ buffer cache can now use up to 15% of the physical memory
+ in the default configuration (tunable via &man.sysctl.8;).
Currently sysctl(8) doesn't mention the vm.bufcache variable... ;-/
At least the following variables should be added to the man page:
and the change must be pulled up to 2.0 branch, but I'm not sure
it will be in time for 2.0 release...
Perhaps mentioning the variable in /Documentation/tune/stune.html
and refering to the page may be safer.
+ A red-black tree is now being used to find entries in
+ vm_map. This speeds up memory allocation.
Well, it speeds up not only memory allocation but also memory
reference, if there are many vm_map entries.
Also, we should find a place to describe $PTHREAD_CONCURRENCY.
Currently pthread(3) man page doesn't mention this environment
varaible, and this should be fixed. Also it may be worth mentioning
this variable somewhere in www.netbsd.org.