Scheduler fixes for hyperthreading
Colin Percival
cperciva at freebsd.org
Sat May 21 22:15:32 PDT 2005
Sam Lawrance wrote:
> On Sat, 2005-05-21 at 22:04 -0700, Colin Percival wrote:
>>Sam Lawrance wrote:
>>>I'm just curious here... would the mac_seeotheruids policy help in
>>>obscuring the value of any information collected by a spy process?
>>
>>Yes. It would mean that the spy could steal an SSL certificate, but
>>not know whose SSL certificate it was. :-)
>
> Can the spy be sure that it's not just stealing fortunes though?
>
> I mean for example, can the cache timings shown on page 7 of your paper
> be used to reliably identify what the other thread on the CPU is?
Yes. The patterns are very distinctive.
Colin Percival
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