Re: boot fail with large RAM

[Christoph Egger <Christoph_Egger%gmx.de@localhost>]

Manuel Bouyer wrote:
> On Wed, Nov 18, 2009 at 08:23:22PM +0100, Manuel Bouyer wrote:
>> [...]
>> I also noticed that amd64 has only 2 free lists, one for the low 16MB
>> memory and one for anything else. Would it help to move to a third
>> free list; one for low 16MB, a second for the low 4GB and a third one for
>> anything else ? uvm(9) doens't say much about free lists ...
> 
> I tried it; it helps a lot (see attached dmesg). The system can boot,
> and devices seems to be working fine. I also tested it on a desktop with
> 8GB ram, and another one with 2GB.
> I think this patch can also help systems which don't have troubles at
> boot time but could end up with bus_dma(9) allocation failures at
> run time. So unless someone objects I'm going to commit the attached
> patch in the next few days, and request a pullup to netbsd-5.

Awesome!
Can you do this for i386/machdep.c, too ? With PAE you can also
utilize more than 4GB RAM.

Christoph