From: Stephane Eranian <eranian@google.com>
To: Don Zickus <dzickus@redhat.com>
Cc: LKML <linux-kernel@vger.kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
mingo@elte.hu, Paul Mackerras <paulus@samba.org>,
Robert Richter <robert.richter@amd.com>
Subject: Re: [PATCH 0/3 v2] new nmi_watchdog using perf events
Date: Fri, 12 Feb 2010 17:12:38 +0100 [thread overview]
Message-ID: <bd4cb8901002120812n7da16b6k29dd9b950ac68f25@mail.gmail.com> (raw)
Don,
How is this new NMI watchdog code going to work when you also have OProfile
enabled in your kernel?
Today, perf_event disables the NMI watchdog while there is at least one event.
By releasing the PMU registers, it also allows for Oprofile to work.
But now with this new NMI watchdog code, perf_event never releases the PMU.
Thus, I suspect Oprofile will not work anymore, unless the NMI watchdog is
explicitly disabled. Up until now OProfile could co-exist with the NMI watchdog.
next reply other threads:[~2010-02-12 16:12 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-02-12 16:12 Stephane Eranian [this message]
2010-02-12 16:59 ` Don Zickus
2010-02-12 17:12 ` Stephane Eranian
2010-02-14 8:31 ` Ingo Molnar
2010-02-15 20:04 ` Robert Richter
-- strict thread matches above, loose matches on Subject: below --
2010-02-06 2:47 Don Zickus
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