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Subject: Re: [PATCH] mm: make __paginginit based on CONFIG_MEMORY_HOTPLUG
To:     Oscar Salvador <osalvador@techadventures.net>
Cc:     Andrew Morton <akpm@linux-foundation.org>,
        Michal Hocko <mhocko@suse.com>,
        Vlastimil Babka <vbabka@suse.cz>,
        kirill.shutemov@linux.intel.com, iamjoonsoo.kim@lge.com,
        Mel Gorman <mgorman@suse.de>,
        Souptick Joarder <jrdr.linux@gmail.com>,
        Linux Memory Management List <linux-mm@kvack.org>,
        LKML <linux-kernel@vger.kernel.org>, osalvador@suse.de
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From:   Pavel Tatashin <pasha.tatashin@oracle.com>
Message-ID: <34d9fff4-cc29-8c6e-42c9-48c4467b6a74@oracle.com>
Date:   Tue, 31 Jul 2018 17:33:27 -0400
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On 07/31/2018 04:50 PM, Oscar Salvador wrote:
> On Tue, Jul 31, 2018 at 11:23:33AM -0400, Pavel Tatashin wrote:
>> Yes we free meminit when no CONFIG_MEMORY_HOTPLUG
>> See here:
>> http://src.illumos.org/source/xref/linux-master/include/asm-generic/vmlinux.lds.h#107
> 
> Oh, I got the point now.
> Somehow I missed that we were freeing up the memory when CONFIG_MEMORY_HOTPLUG
> was not in place.
> 
> So your patch makes sense to me now, sorry.
> 
> Since my patchset [1] + cleanup patch [2] remove almost all __paginginit,
> leaving only pgdat_init_internals() and zone_init_internals(), I think
> it would be great if you base your patch on top of that.
> Or since the patchset has some cleanups already, I could add your patch
> into it (as we did for the zone_to/set_nid() patch) and send a v6 with it.
> 
> What do you think?

Sure, please go ahead include it in v6. Let me know if you need any help. Thank you for this work, I really like how this improves hotplug/memory-init code.

Pavel

> 
> [1] https://patchwork.kernel.org/patch/10548861/
> [2] <20180731101752.GA473@techadventures.net>
> 
> Thanks
>