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Date: Tue, 30 Jan 2018 19:59:41 -0800
From: Andi Kleen <ak@linux.intel.com>
To: Stephane Eranian <eranian@google.com>
Cc: Jiri Olsa <jolsa@redhat.com>, "Liang, Kan" <kan.liang@linux.intel.com>,
        Peter Zijlstra <peterz@infradead.org>, Ingo Molnar <mingo@redhat.com>,
        LKML <linux-kernel@vger.kernel.org>,
        Arnaldo Carvalho de Melo <acme@kernel.org>,
        Thomas Gleixner <tglx@linutronix.de>
Subject: Re: [PATCH V3 0/5] bugs fix for large PEBS mmap read and rdpmc read
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> Still, the part I am missing here, is why asking for
> PERF_SAMPLE_PERIOD voids large PEBS.

I think it was disabled together with frequency mode
(which we could support too, but it's a bit more work)

But yes PERIOD could probably be allowed.


-Andi