Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
Date:   Tue, 27 Feb 2018 19:08:18 +1000
From:   Nicholas Piggin <npiggin@gmail.com>
To:     "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Cc:     Christophe Leroy <christophe.leroy@c-s.fr>,
        linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org
Subject: Re: [RFC REBASED 4/5] powerpc/mm/slice: Use const pointers to
 cached slice masks where possible
Message-ID: <20180227190818.3f3673e4@roar.ozlabs.ibm.com>
In-Reply-To: <87h8q27uvi.fsf@linux.vnet.ibm.com>
References: <02a62db83282b5ef3e0e8281fdc46fa91beffc86.1518382747.git.christophe.leroy@c-s.fr>
        <6a8c9183257dfcfeb1d8ed1ecc778ec3da19dcd4.1518382747.git.christophe.leroy@c-s.fr>
        <87h8q27uvi.fsf@linux.vnet.ibm.com>
Organization: IBM
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

On Tue, 27 Feb 2018 12:59:53 +0530
"Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com> wrote:

> Christophe Leroy <christophe.leroy@c-s.fr> writes:
> 
> > The slice_mask cache was a basic conversion which copied the slice
> > mask into caller's structures, because that's how the original code
> > worked. In most cases the pointer can be used directly instead, saving
> > a copy and an on-stack structure.
> >
> > This also converts the slice_mask bit operation helpers to be the usual
> > 3-operand kind, which is clearer to work with. And we remove some
> > unnecessary intermediate bitmaps, reducing stack and copy overhead
> > further.  
> 
> Can we move the reduce unncessary intermediate bitmaps as another patch?

This was rightly split out -- it moved to Christophe's patch he already
made in his series. The changelog can just be adjusted.

Thanks,
Nick