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Date:   Thu, 6 Sep 2018 15:01:02 +0200
From:   Michal Hocko <mhocko@kernel.org>
To:     Mike Rapoport <rppt@linux.vnet.ibm.com>
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>,
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        paul.burton@mips.com, Thomas Gleixner <tglx@linutronix.de>,
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        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
Message-ID: <20180906130102.GY14951@dhcp22.suse.cz>
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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.

-- 
Michal Hocko
SUSE Labs