Date: Mon, 29 Jun 2009 00:59:07 -0500 From: Alan Cox <alc@cs.rice.edu> To: Nathanael Hoyle <nhoyle@hoyletech.com> Cc: alc@freebsd.org, Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl>, freebsd-hackers@freebsd.org Subject: Re: large pages (amd64) Message-ID: <4A48582B.8050009@cs.rice.edu> In-Reply-To: <4A4810BB.1010007@hoyletech.com> References: <alpine.BSF.2.00.0906281933580.1809@wojtek.tensor.gdynia.pl> <4A480760.50705@hoyletech.com> <ca3526250906281741h5c6c9407vdf9ea849330023ed@mail.gmail.com> <4A4810BB.1010007@hoyletech.com>
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Nathanael Hoyle wrote: [snip] > Having been corrected by both you and Joerg (thank you!), I went back > to re-verify my understanding. It appears that while I was slightly > mixing PAE in with PSE, PSE support for 4MB pages was introduced > 'silently' with the Pentium, and documented first with the Pentium > Pro. I haven't found anything that points to earlier inclusion. > Certainly the 80386 processor specifically, I am fairly confident > would be limited to the 4KB pages. > > Agreed? Or are you aware of earlier usage than the Pentium for 4MB pages? > Yes, I agree. I'm not aware of 4MB page support before the Pentium. Regards, Alan
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