On Sat, 19 Jan 2008, John Summerfield wrote: > Robert P. J. Day wrote: > > On Sat, 19 Jan 2008, John Summerfield wrote: > > > > > Robert P. J. Day wrote: > > > > if i had been installing f8 on a 32-bit, PAE-enabled system with >4G > > > > of RAM, would that have automatically installed the PAE version of the > > > > kernel? or would i have had to make a choice along the way? thanks. > > > Try on one of those spare laptops:-) > > you funny man. :-P actually, it wouldn't help since all of those > > laptops have 64-bit AMD CPUs so PAE doesn't come into play. > > AMD-64 is, I think, a superset of PAE, so PAE would br right if you > install 32-bit. right ... i would still need a PAE-enabled kernel even on a 64-bit CPU if i installed only the 32-bit version of the OS. is that what you were saying? i *believe* that's the case but i haven't tested that since none of my systems have >4G of RAM. > > the actual issue is that, if i have a 32-bit, PAE-enabled system > > with <4G of RAM, obviously, PAE won't be relevant and i'll get a > > regular kernel installed. but what if, even though there's <4G > > *now*, i know that i'll be putting in several gig next week, so > > i'll want the PAE kernel in preparation for that? better yet, > > does it hurt to have a PAE kernel even if you don't need the PAE > > functionality? > > When I replied earlier, I ran dmidecode to see how may RAM slots I > have. I can install 4 Gbytes, but as I understand things I don't get > to use it all unless I use PAE. But I could be wrong, I might not > get to use it all either way. maybe someone more knowledgeable can clarify this. and, again, i'm still unsure if there's any harm in running a PAE-enabled kernel even when you don't need one. rday -- ======================================================================== Robert P. J. Day Linux Consulting, Training and Annoying Kernel Pedantry Waterloo, Ontario, CANADA Home page: http://crashcourse.ca Fedora Cookbook: http://crashcourse.ca/wiki/index.php/Fedora_Cookbook ========================================================================
