linux-kernel - Re: [PATCH] Fix oprofile regression: select RING_BUFFER_ALLOW

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Message-ID: <20090916205452.GL24322@erda.amd.com>
Date:	Wed, 16 Sep 2009 22:54:52 +0200
From:	Robert Richter <robert.richter@....com>
To:	Steven Rostedt <srostedt@...hat.com>
CC:	Christian Borntraeger <borntraeger@...ibm.com>,
	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...e.hu>,
	Stephane Eranian <eranian@...glemail.com>
Subject: Re: [PATCH] Fix oprofile regression: select RING_BUFFER_ALLOW_SWAP

On 16.09.09 16:11:30, Steven Rostedt wrote:
> On Wed, 2009-09-16 at 21:56 +0200, Christian Borntraeger wrote:
> > commit 85bac32c4a52c592b857f2c360cc5ec93a097d70                                                                                                                             
> >     ring-buffer: only enable ring_buffer_swap_cpu when needed
> > broke oprofile (at least on s390, but likely on all platforms).
> > 
> > this patch lets oprofile select RING_BUFER_ALLOW_SWAP to make 
> > ring_buffer_swap_cpu usable for oprofile.
> 
> Thanks, I'll apply this for the 32 queue.

Thanks Christian,

I was just debugging it for x86 too and narrowed it to the
tracing-core merge already.

-Robert

-- 
Advanced Micro Devices, Inc.
Operating System Research Center
email: robert.richter@....com

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