On Wed, 2008-07-16 at 13:11 -0400, Michael ODonnell wrote: > > >excerpt from arch/i386/Kconfig: > >-- > >choice > > depends on EXPERIMENTAL && !X86_PAE > > prompt "Memory split" if EMBEDDED > > default VMSPLIT_3G > >-- > > > >Note the !X86_PAE part. At least above, you mentioned looking in a PAE > >kernel config. :) > > The default kernel appears to have PAE configured so that's the > kernel whose config I was asked to look at. > > I haven't thought this through but I can't think of anything > inherent in the use of PAE (at least in principle, at the > CPU/MMU level) that would make it impossible for Kernel/User to > continue sharing page tables - would you know why the VMSPLIT > option is only present when !X86_PAE ?
X86_PAE depends on HIGHMEM64G, which isn't compatible with the VMSPLIT options, which all appear to require HIGHMEM4G. Nb: per the above, I did read the i686 config slightly wrong before, the VMSPLIT stuff should be compatible with HIGHMEM4G, but for some reason, even in the RHEL5 i686 kernel config, I don't get any VMSPLIT options exposed at the moment (searching shows they're known, but I dunno atm how to get them actually twiddleable). -- Jarod Wilson [EMAIL PROTECTED] _______________________________________________ gnhlug-discuss mailing list [email protected] http://mail.gnhlug.org/mailman/listinfo/gnhlug-discuss/
