MAXPHYS and physical memory (Was: Re: siis/atacam/ata/gmirror 8.0-BETA3 disk performance)

[Mel Flynn]

On Wednesday 02 September 2009 16:51:35 Alexander Motin wrote:

> For maximum linear I/O performance you may want to build kernel with
> options 	MAXPHYS=(1024*1024)

I've found that just doubling the default MAXPHYS already panics-on-boot a 
1.5GB i386 system. Is there any reasonable conversion table for MAXPHYS to 
physical memory, since various memory related kernel setups are derived from 
or calculated with MAXPHYS?
-- 
Mel