On 04/24/2015 01:50 PM, Andy Lutomirski wrote:
>>
>> Exactly my feeling. What are you trying to save? About four CPU
>> cycles of checking %ss != __KERNEL_DS on each switch_to?
>> That's not worth bothering about. Your last patch seems to be perfect.
>
> We'll have to do the write to ss almost every time an AMD CPU sleeps
> in a syscall. Maybe that's still not a big deal.
>
Once you're sleeping anyway, I don't think so.
-hpa
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