On Sun Dec 12 1999 at 10:34:38 +1100, matthew green wrote:

> it is the sparc port's fault.
> 
> due to several issues, the sparc port is by default limited to what
> you see above.  you can work around this by editing the sparc
> machdep.c to change the code that limits these values, and also
> decreasing MAXBSIZE so that kernel memory is not overused.  i
> personally use these values:
> 
> 	options         MAXBSIZE=16384
> 	options         NBUF=2048
> 	options         BUFPAGES=4096

Ah, would this be one of the issues:

esp0: DMA error; resetting
esp0: waiting for SCSI Bus Reset to happen
sd1: disk label read error
sd1(esp0:3:0): max sync rate 4.80Mb/s
cannot mount root, error = 6
root device (default sd1a):

I get that (and a bunch of DMA errors before that) as soon as I tweak
MAXBSIZE, NBUF and BUFPAGES. Will I just have to live with 512kb buffer
cache (and wait hard for UBC which will hopefully fix it...)?

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