From: peterz@infradead.org
To: "Liang, Kan" <kan.liang@linux.intel.com>
Cc: mingo@redhat.com, acme@kernel.org, linux-kernel@vger.kernel.org,
ak@linux.intel.com, Mark Rutland <mark.rutland@arm.com>,
Andy Lutomirski <luto@amacapital.net>
Subject: Re: [PATCH] perf/x86: Reset the counter to prevent the leak for a RDPMC task
Date: Thu, 30 Jul 2020 18:50:57 +0200 [thread overview]
Message-ID: <20200730165057.GC2678@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <20200730164425.GO2655@hirez.programming.kicks-ass.net>
On Thu, Jul 30, 2020 at 06:44:26PM +0200, peterz@infradead.org wrote:
> Arguably we should have perf_mmap_open() check if 'event->hw.target ==
> current', because without that RDPMC is still pointless.
event->hw.target->mm == current->mm, I suppose, otherwise accounting
goes wobbly real fast.
next prev parent reply other threads:[~2020-07-30 16:51 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-30 12:38 [PATCH] perf/x86: Reset the counter to prevent the leak for a RDPMC task kan.liang
2020-07-30 12:58 ` peterz
2020-07-30 15:54 ` Liang, Kan
2020-07-30 16:44 ` peterz
2020-07-30 16:50 ` peterz [this message]
2020-07-31 18:08 ` Liang, Kan
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