From: Andi Kleen <ak@linux.intel.com>
To: Stephane Eranian <eranian@google.com>
Cc: LKML <linux-kernel@vger.kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
"mingo@elte.hu" <mingo@elte.hu>,
Dave Hansen <dave.hansen@intel.com>,
"Yan, Zheng" <zheng.z.yan@intel.com>
Subject: Re: [RFC] perf/x86: PMU IRQ handler issues
Date: Wed, 28 May 2014 13:06:00 -0700 [thread overview]
Message-ID: <20140528200600.GR29957@tassilo.jf.intel.com> (raw)
In-Reply-To: <CABPqkBRW8akWWrRgFwatHbui6+0JqXi=8T2N_JHZ_x4zLuq9EQ@mail.gmail.com>
On Wed, May 28, 2014 at 09:56:35PM +0200, Stephane Eranian wrote:
> On Wed, May 28, 2014 at 9:55 PM, Andi Kleen <ak@linux.intel.com> wrote:
> >
> >> Another explanation is that because we ACK the NMI early, we leave the
> >> door open to other interrupts, incl. NIC, and we are interrupting the execution
> >
> > PMI executes with interrupts off.
> >
> And that's coming from where?
The interrupt gate.
-Andi
next prev parent reply other threads:[~2014-05-28 20:06 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-28 19:48 [RFC] perf/x86: PMU IRQ handler issues Stephane Eranian
2014-05-28 19:55 ` Andi Kleen
2014-05-28 19:56 ` Stephane Eranian
2014-05-28 20:06 ` Andi Kleen [this message]
2014-05-28 20:20 ` Dave Hansen
2014-05-29 2:56 ` Andi Kleen
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