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

Started bySegher Boessenkool <segher@kernel.crashing.org>
First post2015-07-20 15:50 +0200
Last post2015-07-21 08:00 +0200
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  Re: [PATCH V3 2/2] kprobes: Mark OPTPROBES na for powerpc Segher Boessenkool <segher@kernel.crashing.org> - 2015-07-20 15:50 +0200
    Re: [PATCH V3 2/2] kprobes: Mark OPTPROBES na for powerpc Michael Ellerman <mpe@ellerman.id.au> - 2015-07-21 08:00 +0200

#1188194 — Re: [PATCH V3 2/2] kprobes: Mark OPTPROBES na for powerpc

FromSegher Boessenkool <segher@kernel.crashing.org>
Date2015-07-20 15:50 +0200
SubjectRe: [PATCH V3 2/2] kprobes: Mark OPTPROBES na for powerpc
Message-ID<pOjC9-2OM-15@gated-at.bofh.it>
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.


Segher
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#1188680

FromMichael Ellerman <mpe@ellerman.id.au>
Date2015-07-21 08:00 +0200
Message-ID<pOyKR-7PR-1@gated-at.bofh.it>
In reply to#1188194
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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