linux-kernel - Re: [PATCH V3 2/2] kprobes: Mark OPTPROBES na for powerpc

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Message-ID: <1437457811.30722.8.camel@ellerman.id.au>
Date:	Tue, 21 Jul 2015 15:50:11 +1000
From:	Michael Ellerman <mpe@...erman.id.au>
To:	Segher Boessenkool <segher@...nel.crashing.org>
Cc:	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	masami.hiramatsu.pt@...achi.com, mingo@...nel.org,
	linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH V3 2/2] kprobes: Mark OPTPROBES na for powerpc

On Mon, 2015-07-20 at 08:41 -0500, Segher Boessenkool wrote:
> On Mon, Jul 20, 2015 at 04:24:22PM +0530, Ananth N Mavinakayanahalli wrote:
> > There is a potential gain to be had with a direct
> > jump instead of a breakpoint, but the caveats need to be traded off
> > with the complexity it brings in.
> > 
> > For now, mark OPTPROBES na for powerpc.
> 
> If we haven't yet investigated whether this feature is something beneficial
> to the powerpc kernel, it should just stay as TODO, not be marked as n/a.

Yep, agreed. As discussed in the other thread we'll leave this as TODO until we
know it's either not a win or not worth the complexity.

cheers


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