On Wed, 25 Feb 2009 14:15:37 +0100 Thorsten Leemhuis <fedora@xxxxxxxxxxxxx> wrote: > On 25.02.2009 13:27, Chris Lalancette wrote: > > Gerd Hoffmann wrote: > >> We can also simply do this: > >> > >> - Install PAE kernel if the CPU supports PAE. > >> > >> i.e. make PAE the default kernel. > > > > Yes, I really think we should just do this. It's simple, it means we get the > > logic right for Xen as well as bare-metal (without any special cases), and the > > performance hit for those who have PAE and < 4GB isn't that bad, I don't think > > (although numbers one way or the other would be interesting to see). > > What about compatibility problems? My old laptop had a PAE capable CPU > but could not boot a PAE kernel -- I noticed when I was trying a PAE > kernel for some tests two or three years ago. I asked a kernel-developer > back then if it was worth reporting and I got told that such problems > are not unusual and often BIOS or hardware problems. Those likely didn't > vanish magically is that statement is correct. > > The algorithm I posted should handle that. If you support NX or you have >4GB of memory then it's pretty much impossible for you to have one of those old CPUs. And all SVM/VMX capable machines support NX so we'd always have the right kernel for them too. _______________________________________________ Fedora-kernel-list mailing list Fedora-kernel-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/fedora-kernel-list
