linux-kernel - Re: [PATCH v2 13/25] powerpc/8xx: also use r3 in the ITLB miss in all situations

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Message-ID: <5613D6C5.1030100@c-s.fr>
Date:	Tue, 6 Oct 2015 16:12:21 +0200
From:	Christophe Leroy <christophe.leroy@....fr>
To:	Scott Wood <scottwood@...escale.com>
Cc:	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Paul Mackerras <paulus@...ba.org>,
	Michael Ellerman <mpe@...erman.id.au>,
	linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH v2 13/25] powerpc/8xx: also use r3 in the ITLB miss in all
 situations



Le 29/09/2015 02:00, Scott Wood a écrit :
> On Tue, Sep 22, 2015 at 06:50:54PM +0200, Christophe Leroy wrote:
>> We are spending between 40 and 160 cycles with a mean of 65 cycles
>> in the TLB handling routines (measured with mftbl) so make it more
>> simple althought it adds one instruction
>>
>> Signed-off-by: Christophe Leroy <christophe.leroy@....fr>
>> ---
>> No change in v2
>>
>>   arch/powerpc/kernel/head_8xx.S | 15 ++++-----------
>>   1 file changed, 4 insertions(+), 11 deletions(-)
> Why is this a separate patch from 1/25?
>
> Same comments as on that patch.
>
>
Just because here there is no real need behind the simplification of the 
code, whereas the first one was a pre-requisite for the following patch.
Should I merge them together anyway ?

Christophe
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