linux-kernel - Re: [PATCH 0/4] Small cleanup for memoryhotplug

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Date:   Thu, 7 Jun 2018 15:32:25 +0200
From:   Oscar Salvador <osalvador@...hadventures.net>
To:     Jonathan Cameron <Jonathan.Cameron@...wei.com>
Cc:     linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
        mhocko@...e.com, vbabka@...e.cz, pasha.tatashin@...cle.com,
        linux-mm@...ck.org, Oscar Salvador <osalvador@...e.de>
Subject: Re: [PATCH 0/4] Small cleanup for memoryhotplug

On Thu, Jun 07, 2018 at 11:42:45AM +0100, Jonathan Cameron wrote:
> On Fri, 1 Jun 2018 14:53:17 +0200
> <osalvador@...hadventures.net> wrote:
> 
> > From: Oscar Salvador <osalvador@...e.de>
> > 
> > 
> > Hi,
> > 
> > I wanted to give it a try and do a small cleanup in the memhotplug's code.
> > A lot more could be done, but I wanted to start somewhere.
> > I tried to unify/remove duplicated code.
> > 
> > The following is what this patchset does:
> > 
> > 1) add_memory_resource() has code to allocate a node in case it was offline.
> >    Since try_online_node has some code for that as well, I just made add_memory_resource() to
> >    use that so we can remove duplicated code..
> >    This is better explained in patch 1/4.
> > 
> > 2) register_mem_sect_under_node() will be called only from link_mem_sections()
> > 
> > 3) Get rid of link_mem_sections() in favour of walk_memory_range() with a callback to
> >    register_mem_sect_under_node()
> > 
> > 4) Drop unnecessary checks from register_mem_sect_under_node()
> > 
> > 
> > I have done some tests and I could not see anything broken because of 
> > this patchset.
> Works fine with the patch set for arm64 I'm intermittently working on.
> Or at least I don't need to make any additional changes on top of what I currently
> have!
> 
> Tested-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>

Thanks for having tested it Jonathan ;-)!

> 
> Thanks,
> 
> Jonathan
> > 
> > Oscar Salvador (4):
> >   mm/memory_hotplug: Make add_memory_resource use __try_online_node
> >   mm/memory_hotplug: Call register_mem_sect_under_node
> >   mm/memory_hotplug: Get rid of link_mem_sections
> >   mm/memory_hotplug: Drop unnecessary checks from
> >     register_mem_sect_under_node
> > 
> >  drivers/base/memory.c |   2 -
> >  drivers/base/node.c   |  52 +++++---------------------
> >  include/linux/node.h  |  21 +++++------
> >  mm/memory_hotplug.c   | 101 ++++++++++++++++++++++++++------------------------
> >  4 files changed, 71 insertions(+), 105 deletions(-)
> > 
> 
>