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From:   Pavel Tatashin <pasha.tatashin@oracle.com>
Date:   Sun, 1 Jul 2018 21:46:36 -0400
Message-ID: <CAGM2reYRYNOe0nweMrSxLZ_RRQbu500iSRKWrbO4_CzyWTEtjQ@mail.gmail.com>
Subject: Re: [PATCH v2 2/2] mm/sparse: start using sparse_init_nid(), and
 remove old code
To:     bhe@redhat.com
Cc:     Steven Sistare <steven.sistare@oracle.com>,
        Daniel Jordan <daniel.m.jordan@oracle.com>,
        LKML <linux-kernel@vger.kernel.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        kirill.shutemov@linux.intel.com, Michal Hocko <mhocko@suse.com>,
        Linux Memory Management List <linux-mm@kvack.org>,
        dan.j.williams@intel.com, jack@suse.cz, jglisse@redhat.com,
        Souptick Joarder <jrdr.linux@gmail.com>,
        gregkh@linuxfoundation.org, Vlastimil Babka <vbabka@suse.cz>,
        Wei Yang <richard.weiyang@gmail.com>, dave.hansen@intel.com,
        rientjes@google.com, mingo@kernel.org, osalvador@techadventures.net
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                         ~~~
> Here, node id passed to sparse_init_nid() should be 'nid_begin', but not
> 'nid'. When you found out the current section's 'nid' is diferent than
> 'nid_begin', handle node 'nid_begin', then start to next node 'nid'.

Thank you for reviewing this work. Here nid equals to nid_begin:

See, "if" at 501, and this call is at 505.

492 void __init sparse_init(void)
493 {
494         unsigned long pnum_begin = first_present_section_nr();
495         int nid_begin = sparse_early_nid(__nr_to_section(pnum_begin));
496         unsigned long pnum_end, map_count = 1;
497
498         for_each_present_section_nr(pnum_begin + 1, pnum_end) {
499                 int nid = sparse_early_nid(__nr_to_section(pnum_end));
500
501                 if (nid == nid_begin) {
502                         map_count++;
503                         continue;
504                 }
505                 sparse_init_nid(nid, pnum_begin, pnum_end, map_count);
506                 nid_begin = nid;
507                 pnum_begin = pnum_end;
508                 map_count = 1;
509         }
510         sparse_init_nid(nid_begin, pnum_begin, pnum_end, map_count);
511         vmemmap_populate_print_last();
512 }

Thank you,
Pavel