Re: [PATCH] x86,seccomp,prctl: Remove PR_TSC_SIGSEGV and seccomp TSC filtering

[Peter Zijlstra]

On Fri, Oct 03, 2014 at 11:02:13PM +0200, Peter Zijlstra wrote:
> @@ -1928,7 +1939,7 @@ void arch_perf_update_userpage(struct perf_event_mmap_page *userpg, u64 now)
>  
>  	userpg->cap_user_time = 0;
>  	userpg->cap_user_time_zero = 0;
> -	userpg->cap_user_rdpmc = x86_pmu.attr_rdpmc;
> +	userpg->cap_user_rdpmc = x86_pmu.attr_rdpmc && test_thread_flag(TIF_SECCOMP);

&& !test_thread_flag(TIF_SECCOMP) would probably work better

>  	userpg->pmc_width = x86_pmu.cntval_bits;
>  
>  	if (!sched_clock_stable())
--
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