linux-kernel - Re: [PATCH v3 1/2] perf tools: fix a typo of a Power7 event name

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Date:	Fri, 28 Jun 2013 00:26:14 +1000
From:	Michael Ellerman <michael@...erman.id.au>
To:	Runzhen Wang <runzhen@...ux.vnet.ibm.com>
Cc:	linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
	paulus@...ba.org, acme@...hat.com, sukadev@...ux.vnet.ibm.com,
	xiaoguangrong@...ux.vnet.ibm.com
Subject: Re: [PATCH v3 1/2] perf tools: fix a typo of a Power7 event name

On Tue, Jun 25, 2013 at 10:35:32PM +0800, Runzhen Wang wrote:
> In the Power7 PMU guide:
> https://www.power.org/documentation/commonly-used-metrics-for-performance-analysis/
> PM_BRU_MPRED is referred to as PM_BR_MPRED.
> 
> It fixed the typo by changing the name of the event in kernel
> and documentation accordingly.

This patch fixes the typo by ...

> This patch changes the ABI, there are some reasons I think it's ok:
> 
> - It is relatively new interface, specific to the Power7 platform.
> 
> - No tools that we know of actually use this interface at this point
>  (none are listed near the interface).
> 
> - Users of this interface (eg oprofile users migrating to perf)
>   would be more used to the "PM_BR_MPRED" rather than "PM_BRU_MPRED".
> 
> - These are in the ABI/testing at this point rather than ABI/stable,
>   so hoping we have some wiggle room.
> 
> Signed-off-by: Runzhen Wang <runzhen@...ux.vnet.ibm.com>

Acked-by: Michael Ellerman <michael@...erman.id.au>

cheers
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