Messages in this thread | | | From | Andy Lutomirski <> | Date | Fri, 3 Oct 2014 13:27:52 -0700 | Subject | Re: [PATCH] x86,seccomp,prctl: Remove PR_TSC_SIGSEGV and seccomp TSC filtering |
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On Fri, Oct 3, 2014 at 1:22 PM, Andy Lutomirski <luto@amacapital.net> wrote: > > We could make the rule be that RDPMC is enabled if a perf event is > mmapped or TIF_SECCOMP is clear, but I'd prefer to be convinced that > there's an actual performance issue first. Ideally we can get this > all working with no API or ABI change at all.
No, we can't use that rule. But we could say that RDPMC is enabled if a perf event is mmapped and no thread in the mm uses seccomp. I'll grumble a little bit about adding yet another piece of seccomp state.
--Andy
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