Linus Torvalds wrote:
quoted text
>>>
>> I think what we need to do is to test the NOPL instruction and create a
>> Linux-specific CPUID bit for it.  I'll do that and submit to tip:x86/cpu.
> 
> I also suspect that we'd really be much better off just fixing the generic 
> NOP tables for the 5-byte nop. As far as I could tell, from all the 
> numbers that have been posted, absolutely _none_ show that there is any 
> point at all to the 2-instruction 3/2-byte sequence.
> 
> So instead of having a magic special ftrace-only thing, why not just do it 
> right, and fix the generic 5-byte nop sequence?
> 

There is that, too.  The two are orthogonal.

	-hpa
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