Re: [RFC PATCH 07/29] memblock: remove _virt from APIs returning virtual address

[Mike Rapoport <rppt@linux.vnet.ibm.com>]

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.

Besides, from what I've seen, many users of memblock_phys_alloc can be
converted to the virtual variant and then we can just have memblock_alloc
everywhere in the end.

Currently there are ~70 users of memblock_virt_alloc*, but with the
bootmem -> memblock conversion we'll be adding ~140 more.

> -- 
> Michal Hocko
> SUSE Labs
> 

-- 
Sincerely yours,
Mike.