Date: Thu, 09 Apr 2015 14:10:59 +0100 From: Arthur Chance <freebsd@qeng-ho.org> To: =?UTF-8?B?UGllcnJlLVl2ZXMgUMOpbmVhdQ==?= <Pierre-Yves.Peneau@lip6.fr>, freebsd-questions@freebsd.org Subject: Re: How FreeBSD manage more than 4GB on 32 bits architecture Message-ID: <55267A63.4040503@qeng-ho.org> In-Reply-To: <55264DC5.9070606@asim.lip6.fr> References: <5526408F.1090005@asim.lip6.fr> <20150409114941.692910293a8120de4dafd400@yahoo.es> <20150409114906.6dd4379c@archlinux> <55264DC5.9070606@asim.lip6.fr>
next in thread | previous in thread | raw e-mail | index | archive | help
On 09/04/2015 11:00, Pierre-Yves Péneau wrote: > > On 04/09/2015 11:49 AM, Ralf Mardorf wrote: >> On Thu, 9 Apr 2015 11:49:41 +0200, Eduardo Morras wrote: >>> You are looking for PAE. >> >> Hi, >> >> PAE does not support up to 8TB as the OP mentions. PAE is limited >> to 64 GiB. >> >> > > Sorry, I forgot something important. My physical memory is 1TB, and as > Ralf said, PAE is limited to 64GB (36 bits). I'm looking for a 40 bits > support (at least). I've just realised the original post said > According to the architecture handbook(*), "FreeBSD could > theoretically handle memory configurations up to 8TB on a 32 bit > platform." Having followed the link, I find that's a partial quote, and the full one was "In fact, if the mmu were capable of it, FreeBSD could theoretically handle memory configurations up to 8TB on a 32 bit platform. However, since most 32 bit platforms are only capable of mapping 4GB of ram, this is a moot point." I.e. it was talking about the software architecture of the kernel virtual memory manager on 32 bit processors, not the hardware. -- Those who do not learn from computing history are doomed to GOTO 1
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?55267A63.4040503>