Date: Sun, 11 Mar 2001 20:50:24 -0800 From: Alfred Perlstein <bright@wintelcom.net> To: Joseph Gleason <clash@tasam.com> Cc: Ian Campbell <ianc@ednet.co.uk>, freebsd-hackers@FreeBSD.ORG Subject: Re: Greater than 2GB per process Message-ID: <20010311205023.P18351@fw.wintelcom.net> In-Reply-To: <003701c0aaaf$a4566ce0$dc02010a@fireduck.com>; from clash@tasam.com on Sun, Mar 11, 2001 at 11:48:09PM -0500 References: <Pine.LNX.4.31L2.0103120005460.9179-100000@pachabel.ednet.co.uk> <20010311204130.N18351@fw.wintelcom.net> <003701c0aaaf$a4566ce0$dc02010a@fireduck.com>
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* Joseph Gleason <clash@tasam.com> [010311 20:48] wrote: > > ----- Original Message ----- > From: "Alfred Perlstein" <bright@wintelcom.net> > To: "Ian Campbell" <ianc@ednet.co.uk> > Cc: <freebsd-hackers@FreeBSD.ORG> > Sent: Sunday, March 11, 2001 23:41 > Subject: Re: Greater than 2GB per process > > > > * Ian Campbell <ianc@ednet.co.uk> [010311 16:14] wrote: > > > > > > Hello, > > > Could anybody advise me on the possiblity of having greater than > > > 2GB per process on FreeBSD. I have tried increasing the limit beyond > this > > > and the kernel compiles successfully - however libc causes every process > > > to segfault. I am assuming that just recompiling the C library wouldn't > do > > > the trick but perhaps someone could confirm this. > > > > It's not possible on the Intel archetecture with the current system, > > changing the current intel system to use > 2GB processes would cost too > > much in terms of performance (64 bit values on a 32 bit system). > > > > At least that's what i've been told. > > > > I know very little about how kernel or low level processor stuff works, but > shouldn't we be able to do a 4GB process on a 32-bit system? > The limitation of 2GB per process should only be an issue if there is some > need to use signed numbers, right? Yes, we use signed numbers. Check the list archives, there's some pretty detailed discussions that explain why it's this way. -- -Alfred Perlstein - [bright@wintelcom.net|alfred@freebsd.org] To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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