linux-kernel - Re: [PATCH] module: ppc64 module CRC relocation fix causes perf issues

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Message-ID: <1374019697.8183.351@snotra>
Date:	Tue, 16 Jul 2013 19:08:17 -0500
From:	Scott Wood <scottwood@...escale.com>
To:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
CC:	Paul Mackerras <paulus@...ba.org>,
	Rusty Russell <rusty@...tcorp.com.au>,
	Neil Horman <nhorman@...driver.com>,
	<linuxppc-dev@...ts.ozlabs.org>, <linux-kernel@...r.kernel.org>,
	Anton Blanchard <anton@...ba.org>
Subject: Re: [PATCH] module: ppc64 module CRC relocation fix causes perf
 issues

On 07/16/2013 07:04:05 PM, Benjamin Herrenschmidt wrote:
> On Tue, 2013-07-16 at 17:40 -0500, Scott Wood wrote:
> > On 07/15/2013 03:47:06 AM, Benjamin Herrenschmidt wrote:
> > > On Mon, 2013-07-15 at 14:04 +1000, Anton Blanchard wrote:
> > > > Module CRCs are implemented as absolute symbols that get  
> resolved by
> > > > a linker script. We build an intermediate .o that contains an
> > > > unresolved symbol for each CRC. genksysms parses this .o,  
> calculates
> > > > the CRCs and writes a linker script that "resolves" the symbols  
> to
> > > > the calc
> > >
> > > Scott, can somebody from FSL test that on 32-bit and Ack it ?
> > >
> > > Thanks !
> > >
> > > Cheers,
> > > Ben.
> >
> > It boots for me on e500mc and I can insert modules.
> 
> But does perf work ? :-)

What specifically should I do to test it?

-Scott
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