Re: [PATCH v2] x86: Return to kernel without IRET

[H. Peter Anvin]

On 05/03/2014 04:24 AM, Steven Rostedt wrote:
> On Fri, 02 May 2014 21:03:10 -0700
> "H. Peter Anvin" <hpa@xxxxxxxxx> wrote:
> 
>>
>> I'd really like to see a workload which would genuinely benefit before
>> adding more complexity.  Now... if we can determine that it doesn't harm
>> anything and would solve the NMI nesting problem cleaner than the
>> current solution, that would justify things, too...
>>
> 
> As I stated before. It doesn't solve the NMI nesting problem. It only
> handles page faults. We would have to implement this for breakpoint
> return paths too. Is that a plan as well?
> 

I would assume we would do it for *ALL* the IRETs.  There are only three
IRETs in the kernel last I checked...

	-hpa


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