linux-kernel - Re: [PATCH 2/2] mm/sparse.c: Add nr_present_sections to change the mem

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Message-ID: <7494fba4-a769-67d4-4121-508bd26da4ba@linux.intel.com>
Date:   Thu, 1 Feb 2018 06:23:34 -0800
From:   Dave Hansen <dave.hansen@...ux.intel.com>
To:     Baoquan He <bhe@...hat.com>
Cc:     "Kirill A. Shutemov" <kirill@...temov.name>,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        akpm@...ux-foundation.org, kirill.shutemov@...ux.intel.com,
        mhocko@...e.com, tglx@...utronix.de, douly.fnst@...fujitsu.com
Subject: Re: [PATCH 2/2] mm/sparse.c: Add nr_present_sections to change the
 mem_map allocation

On 02/01/2018 06:19 AM, Baoquan He wrote:
> 
> I suppose these functions changed here are only called during system
> bootup, namely in paging_init(). Hot-add memory goes in a different
> path, __add_section() -> sparse_add_one_section(), different called
> functions.

But does this keep those sections that were not present on boot from
being added later?