Date: Wed, 4 Oct 2000 23:46:29 +0100 (BST) From: Doug Rabson <dfr@nlsystems.com> To: Wilko Bulte <wkb@freebie.demon.nl> Cc: Matthew Jacob <mjacob@feral.com>, FreeBSD-alpha mailing list <freebsd-alpha@freebsd.org> Subject: Re: max memory on Alpha? Message-ID: <Pine.BSF.4.21.0010042345000.94692-100000@salmon.nlsystems.com> In-Reply-To: <20001003212847.A1868@freebie.demon.nl>
next in thread | previous in thread | raw e-mail | index | archive | help
On Tue, 3 Oct 2000, Wilko Bulte wrote: > On Tue, Oct 03, 2000 at 11:57:55AM -0700, Matthew Jacob wrote: > > On Tue, 3 Oct 2000, Wilko Bulte wrote: > > > > > What is the currently max supported memory size on Alpha? 2Gb maybe? > > > Or will 4Gb also be OK? > > > > > > Reason for asking is that I want to try a AS8400 who is equipped > > > with 3x 4Gb memory module. > > > > I've run 8400s up to 2GB. Any more than that and you'll find that S/G > > DMA hasn't been finished ;-). > > Well, on 12Gb it panics with pmap_foo <don't remember what foo was > off the top of my head> on 4.1-R ;-) Might this mean it cannot create the > necessary page table admin on > 2Gb? > > Do you know *if* there is a hard limit at 2Gb? I don't think there is a *hard* limit for the basic VM system but I imagine it might have problems finding a large enough contiguous region to map the vm_page_t structures. The main limitation is in the i/o system as previously noted. -- Doug Rabson Mail: dfr@nlsystems.com Phone: +44 20 8348 6160 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-alpha" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?Pine.BSF.4.21.0010042345000.94692-100000>