From: Peter Zijlstra <peterz@infradead.org>
To: Namhyung Kim <namhyung@kernel.org>
Cc: Ingo Molnar <mingo@kernel.org>,
Kan Liang <kan.liang@linux.intel.com>,
Mark Rutland <mark.rutland@arm.com>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
Stephane Eranian <eranian@google.com>,
Ravi Bangoria <ravi.bangoria@amd.com>
Subject: Re: [RFC/PATCH 4/4] perf/x86: Relax privilege filter restriction on AMD IBS
Date: Wed, 4 Sep 2024 13:39:08 +0200 [thread overview]
Message-ID: <20240904113908.GG4723@noisy.programming.kicks-ass.net> (raw)
In-Reply-To: <CAM9d7ch8fwk-o7W6KrTgtJ5n8-oVMGqzxvW_zd_hrcWFoE2AHg@mail.gmail.com>
On Tue, Sep 03, 2024 at 09:34:58AM -0700, Namhyung Kim wrote:
> > While the IBS thing only sucks when you use exclude_[user,kernel]
> > things. Stealth suckage is bad and enrages people.
>
> Right, let's make it explicit like the above.
Given Ravi's concern, perhaps a whole second PMU instance 'ibs_swfilt'
or so? Might have more problems than its worth though, but perhaps
something worth exploring for a bit.
prev parent reply other threads:[~2024-09-04 11:39 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-08-30 23:29 [RFC/PATCH 0/4] perf: Relax privilege restriction on AMD IBS (v2) Namhyung Kim
2024-08-30 23:29 ` [RFC/PATCH 1/4] perf/core: Add PERF_FORMAT_DROPPED Namhyung Kim
2024-08-30 23:29 ` [RFC/PATCH 2/4] perf/core: Export perf_exclude_event() Namhyung Kim
2024-08-30 23:29 ` [RFC/PATCH 3/4] perf/core: Account dropped samples from BPF Namhyung Kim
2024-08-30 23:29 ` [RFC/PATCH 4/4] perf/x86: Relax privilege filter restriction on AMD IBS Namhyung Kim
2024-09-02 9:12 ` Peter Zijlstra
2024-09-02 17:30 ` Namhyung Kim
2024-09-03 8:54 ` Peter Zijlstra
[not found] ` <CAM9d7ch8fwk-o7W6KrTgtJ5n8-oVMGqzxvW_zd_hrcWFoE2AHg@mail.gmail.com>
2024-09-04 6:53 ` Ravi Bangoria
2024-09-04 11:39 ` Peter Zijlstra [this message]
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