The patch titled
Subject: mm/sparse.c: add a static variable nr_present_sections
has been added to the -mm tree. Its filename is
mm-sparse-add-a-static-variable-nr_present_sections.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-sparse-add-a-static-variable-nr_present_sections.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-sparse-add-a-static-variable-nr_present_sections.patch
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------------------------------------------------------
From: Baoquan He <bhe@xxxxxxxxxx>
Subject: mm/sparse.c: add a static variable nr_present_sections
It's used to record how many memory sections are marked as present
during system boot up, and will be used in the later patch.
Link: http://lkml.kernel.org/r/20180228032657.32385-2-bhe@xxxxxxxxxx
Signed-off-by: Baoquan He <bhe@xxxxxxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Cc: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
Cc: Pankaj Gupta <pagupta@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/sparse.c | 7 +++++++
1 file changed, 7 insertions(+)
diff -puN mm/sparse.c~mm-sparse-add-a-static-variable-nr_present_sections mm/sparse.c
--- a/mm/sparse.c~mm-sparse-add-a-static-variable-nr_present_sections
+++ a/mm/sparse.c
@@ -202,6 +202,12 @@ static inline int next_present_section_n
(section_nr <= __highest_present_section_nr)); \
section_nr = next_present_section_nr(section_nr))
+/*
+ * Record how many memory sections are marked as present
+ * during system bootup.
+ */
+static int __initdata nr_present_sections;
+
/* Record a memory area against a node. */
void __init memory_present(int nid, unsigned long start, unsigned long end)
{
@@ -231,6 +237,7 @@ void __init memory_present(int nid, unsi
ms->section_mem_map = sparse_encode_early_nid(nid) |
SECTION_IS_ONLINE;
section_mark_present(ms);
+ nr_present_sections++;
}
}
}
_
Patches currently in -mm which might be from bhe@xxxxxxxxxx are
mm-sparse-add-a-static-variable-nr_present_sections.patch
mm-sparsemem-defer-the-ms-section_mem_map-clearing.patch
mm-sparse-add-a-new-parameter-data_unit_size-for-alloc_usemap_and_memmap.patch
mm-sparse-optimize-memmap-allocation-during-sparse_init.patch
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