linux-kernel - Re: stable: please queue commit 0231bb5 ("perf: Fix event group context move")

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Date:	Sat, 31 Aug 2013 21:47:29 +0100
From:	Ben Hutchings <ben@...adent.org.uk>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	Li Zefan <lizefan@...wei.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Peter Zijlstra <peterz@...radead.org>,
	LKML <linux-kernel@...r.kernel.org>,
	stable <stable@...r.kernel.org>
Subject: Re: stable: please queue commit 0231bb5 ("perf: Fix event group
 context move")

On Mon, 2013-08-05 at 10:21 +0200, Ingo Molnar wrote:
> * Li Zefan <lizefan@...wei.com> wrote:
> 
> > Plese consider adding commit 0231bb5336758426b44ccd798ccd3c5419c95d58
> > to stable tree. It fixes a real bug, which was explained here:
> > 
> > 	http://thread.gmane.org/gmane.linux.kernel.perf.user/1144
> > 
> > and I've managed to reproduce the bug in 3.4 kernel with the test
> > program attached in the above email, and I've confirmed the bug fix.
> > 
> > The effect of the bug is, if we open a group of mixed events(sw/hw)
> > and the "disabled" flag is not set and sw events come first, then
> > some of the perf events won't be started after the call to perf_event_open().
> > 
> > The bug fix should be applicable to kernels >= 3.0 && <= 3.7.
> 
> Acked-by: Ingo Molnar <mingo@...nel.org>

Queued up for 3.2, thanks.

Ben.

-- 
Ben Hutchings
If God had intended Man to program,
we'd have been born with serial I/O ports.

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