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:   Thu, 6 Sep 2018 16:39:58 +0300
From:   Mike Rapoport <rppt@linux.vnet.ibm.com>
To:     Michal Hocko <mhocko@kernel.org>
Cc:     Rob Herring <robh@kernel.org>, linux-mm@kvack.org,
        Andrew Morton <akpm@linux-foundation.org>, davem@davemloft.net,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        mingo@redhat.com, Michael Ellerman <mpe@ellerman.id.au>,
        paul.burton@mips.com, Thomas Gleixner <tglx@linutronix.de>,
        tony.luck@intel.com, linux-ia64@vger.kernel.org,
        linux-mips@linux-mips.org, linuxppc-dev@lists.ozlabs.org,
        sparclinux@vger.kernel.org,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [RFC PATCH 07/29] memblock: remove _virt from APIs returning
 virtual address
References: <1536163184-26356-1-git-send-email-rppt@linux.vnet.ibm.com>
 <1536163184-26356-8-git-send-email-rppt@linux.vnet.ibm.com>
 <CABGGiswdb1x-=vqrgxZ9i2dnLdsgtXq4+5H9Y1JRd90YVMW69A@mail.gmail.com>
 <20180905172017.GA2203@rapoport-lnx>
 <20180906072800.GN14951@dhcp22.suse.cz>
 <20180906124321.GD27492@rapoport-lnx>
 <20180906130102.GY14951@dhcp22.suse.cz>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20180906130102.GY14951@dhcp22.suse.cz>
User-Agent: Mutt/1.5.24 (2015-08-30)
Message-Id: <20180906133958.GM27492@rapoport-lnx>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

On Thu, Sep 06, 2018 at 03:01:02PM +0200, Michal Hocko wrote:
> On Thu 06-09-18 15:43:21, Mike Rapoport wrote:
> > On Thu, Sep 06, 2018 at 09:28:00AM +0200, Michal Hocko wrote:
> > > On Wed 05-09-18 20:20:18, Mike Rapoport wrote:
> > > > On Wed, Sep 05, 2018 at 12:04:36PM -0500, Rob Herring wrote:
> > > > > On Wed, Sep 5, 2018 at 11:00 AM Mike Rapoport <rppt@linux.vnet.ibm.com> wrote:
> > > > > >
> > > > > > The conversion is done using
> > > > > >
> > > > > > sed -i 's@memblock_virt_alloc@memblock_alloc@g' \
> > > > > >         $(git grep -l memblock_virt_alloc)
> > > > > 
> > > > > What's the reason to do this? It seems like a lot of churn even if a
> > > > > mechanical change.
> > > > 
> > > > I felt that memblock_virt_alloc_ is too long for a prefix, e.g:
> > > > memblock_virt_alloc_node_nopanic, memblock_virt_alloc_low_nopanic.
> > > > 
> > > > And for consistency I've changed the memblock_virt_alloc as well.
> > > 
> > > I would keep the current API unless the name is terribly misleading or
> > > it can be improved a lot. Neither seems to be the case here. So I would
> > > rather stick with the status quo.
> > 
> > I'm ok with the memblock_virt_alloc by itself, but having 'virt' in
> > 'memblock_virt_alloc_try_nid_nopanic' and 'memblock_virt_alloc_low_nopanic'
> > reduces code readability in my opinion.
> 
> Well, is _nopanic really really useful in the name. Do we even need/want
> implicit panic/nopanic semantic? The code should rather check for the
> return value and decide depending on the code path. I suspect removing
> panic/nopanic would make the API slightly lighter.
 
I agree that panic/nopanic should be removed. But I prefer to start with
equivalent replacement to make it as automated as possible and update
memblock API when the dust settles a bit.

> -- 
> Michal Hocko
> SUSE Labs
> 

-- 
Sincerely yours,
Mike.