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Re: fc5 kernels after 1788 have excessive, kernel overhead



On Tue, Jan 03, 2006 at 02:32:34AM +0000, Andy Burns wrote:
 > Dave Jones wrote:
 > 
 > >The reason for this is that the SMP
 > >kernel has support for physical address extensions (PAE)
 > 
 > I didn't know NX needed PAE

The wider page table entries (PTE's) have the space for the NX bit
whereas the 32-bit wide entries don't.

The above only applies to 32bit x86 btw.
x86-64 runs PAE-alike PTEs by default, so it's always available there.

 > >You tell me :)  I can't think of any reason why this has suddenly
 > >broken that would be related to that though.
 > 
 > I mentioned HT in relation to NX, not to the SATA problem :-)

NX has no relationship with HT, so shouldn't make a difference.

		Dave


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