RE: Best way to get max KVA setting?

I'm that guy who was running PAE on an 8GB machine...

BTW, it turns out the problem was _not_ the autotuning, it was simply an
overflow of a 32-bit variable in the kernel.  It's been fixed in
-current, checked in 2 weeks ago.

-----Original Message-----
From: Terry Lambert [mailto:tlambert2_at_mindspring.com] 
Sent: Wednesday, June 25, 2003 3:26 AM
To: Mike Silbersack
Cc: current_at_freebsd.org
Subject: Re: Best way to get max KVA setting?


Mike Silbersack wrote:
> I could probably grep for this, but what's the best way to get a hold 
> of the # of pages (or MB of ram) that max KVA is set to?  I'm adding 
> another autosize option, and I want to base it on min (KVA, ram) so 
> that it doesn't balloon on boxes where ram >> KVA.

I posted a patch about a month ago that did exactly this.

It was for a guy who was was running with PAE enabled on an
8G machine, and the autotuning was shooting him in the foot when it
tried to grab enough memory to create kmem_map entries for the 8G of RAM
in his 2G KVA space, and its head exploded.

Let me know if you can't find it in the -current archives, and I can dig
it out for you, if you're willing to wait a day or two.

-- Terry