linux-kernel - Re: [PATCH v5 4/4] mm/sparse: Optimize memmap allocation during sparse

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Date:   Fri, 29 Jun 2018 14:59:35 -0400
From:   Pavel Tatashin <pasha.tatashin@...cle.com>
To:     dave.hansen@...el.com
Cc:     bhe@...hat.com, LKML <linux-kernel@...r.kernel.org>,
        Andrew Morton <akpm@...ux-foundation.org>, pagupta@...hat.com,
        Linux Memory Management List <linux-mm@...ck.org>,
        kirill.shutemov@...ux.intel.com
Subject: Re: [PATCH v5 4/4] mm/sparse: Optimize memmap allocation during sparse_init()

> > This is done so nr_consumed_maps does not get out of sync with the
> > current pnum. pnum does not equal to nr_consumed_maps, as there are
> > may be holes in pnums, but there is one-to-one correlation.
> Can this be made more clear in the code?

Absolutely. I've done it here:
http://lkml.kernel.org/r/20180628173010.23849-1-pasha.tatashin@oracle.com

Pavel