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

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Date:	Wed, 16 Sep 2009 16:11:30 -0400
From:	Steven Rostedt <srostedt@...hat.com>
To:	Christian Borntraeger <borntraeger@...ibm.com>
Cc:	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...e.hu>,
	Robert Richter <robert.richter@....com>
Subject: Re: [PATCH] Fix oprofile regression: select RING_BUFFER_ALLOW_SWAP

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.

-- Steve

PS. Please send patches to my rostedt@...dmis.org account. I don't
always read my Red Hat email.

> 
> Signed-off-by: Christian Borntraeger <borntraeger@...ibm.com>
> CC-ed: Steven Rostedt <srostedt@...hat.com> 
> CC-ed: Ingo Molnar <mingo@...e.hu>
> CC-ed: Robert Richter <robert.richter@....com>                                                                                                                      
> ---
>  arch/Kconfig |    1 +
>  1 file changed, 1 insertion(+)
> 
> Index: linux-2.6/arch/Kconfig
> ===================================================================
> --- linux-2.6.orig/arch/Kconfig
> +++ linux-2.6/arch/Kconfig
> @@ -9,6 +9,7 @@ config OPROFILE
>  	depends on TRACING_SUPPORT
>  	select TRACING
>  	select RING_BUFFER
> +	select RING_BUFFER_ALLOW_SWAP
>  	help
>  	  OProfile is a profiling system capable of profiling the
>  	  whole system, include the kernel, kernel modules, libraries,

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