[failures] mm-sparse-remove-config_sparsemem_alloc_mem_map_together.patch removed from -mm tree

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The patch titled
     Subject: mm/sparse: Remove CONFIG_SPARSEMEM_ALLOC_MEM_MAP_TOGETHER
has been removed from the -mm tree.  Its filename was
     mm-sparse-remove-config_sparsemem_alloc_mem_map_together.patch

This patch was dropped because it had testing failures

------------------------------------------------------
From: Baoquan He <bhe@xxxxxxxxxx>
Subject: mm/sparse: Remove CONFIG_SPARSEMEM_ALLOC_MEM_MAP_TOGETHER

Pavel pointed out that the behaviour of allocating memmap together
for one node should be defaulted for all ARCH-es. It won't break
anything because it will drop to the fallback action to allocate
imemmap for each section at one time if failed on large chunk of
memory.

So remove CONFIG_SPARSEMEM_ALLOC_MEM_MAP_TOGETHER and clean up the
related codes.

Link: http://lkml.kernel.org/r/20180628062857.29658-6-bhe@xxxxxxxxxx
Signed-off-by: Baoquan He <bhe@xxxxxxxxxx>
Reviewed-by: Pavel Tatashin <pasha.tatashin@xxxxxxxxxx>
Cc: Pavel Tatashin <pasha.tatashin@xxxxxxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxx>
Cc: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
Cc: Oscar Salvador <osalvador@xxxxxxxxxxxxxxxxxx>
Cc: Pankaj Gupta <pagupta@xxxxxxxxxx>
Cc: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---

 mm/Kconfig  |    4 ----
 mm/sparse.c |   32 ++------------------------------
 2 files changed, 2 insertions(+), 34 deletions(-)

diff -puN mm/Kconfig~mm-sparse-remove-config_sparsemem_alloc_mem_map_together mm/Kconfig
--- a/mm/Kconfig~mm-sparse-remove-config_sparsemem_alloc_mem_map_together
+++ a/mm/Kconfig
@@ -115,10 +115,6 @@ config SPARSEMEM_EXTREME
 config SPARSEMEM_VMEMMAP_ENABLE
 	bool
 
-config SPARSEMEM_ALLOC_MEM_MAP_TOGETHER
-	def_bool y
-	depends on SPARSEMEM && X86_64
-
 config SPARSEMEM_VMEMMAP
 	bool "Sparse Memory virtual memmap"
 	depends on SPARSEMEM && SPARSEMEM_VMEMMAP_ENABLE
diff -puN mm/sparse.c~mm-sparse-remove-config_sparsemem_alloc_mem_map_together mm/sparse.c
--- a/mm/sparse.c~mm-sparse-remove-config_sparsemem_alloc_mem_map_together
+++ a/mm/sparse.c
@@ -457,7 +457,6 @@ void __init sparse_mem_maps_populate_nod
 }
 #endif /* !CONFIG_SPARSEMEM_VMEMMAP */
 
-#ifdef CONFIG_SPARSEMEM_ALLOC_MEM_MAP_TOGETHER
 static void __init sparse_early_mem_maps_alloc_node(void *data,
 				 unsigned long pnum_begin,
 				 unsigned long pnum_end,
@@ -467,22 +466,6 @@ static void __init sparse_early_mem_maps
 	sparse_mem_maps_populate_node(map_map, pnum_begin, pnum_end,
 					 map_count, nodeid);
 }
-#else
-static struct page __init *sparse_early_mem_map_alloc(unsigned long pnum)
-{
-	struct page *map;
-	struct mem_section *ms = __nr_to_section(pnum);
-	int nid = sparse_early_nid(ms);
-
-	map = sparse_mem_map_populate(pnum, nid, NULL);
-	if (map)
-		return map;
-
-	pr_err("%s: sparsemem memory map backing failed some memory will not be available\n",
-	       __func__);
-	return NULL;
-}
-#endif
 
 void __weak __meminit vmemmap_populate_print_last(void)
 {
@@ -544,14 +527,11 @@ void __init sparse_init(void)
 {
 	unsigned long pnum;
 	struct page *map;
+	struct page **map_map;
 	unsigned long *usemap;
 	unsigned long **usemap_map;
-	int size;
+	int size, size2;
 	int nr_consumed_maps = 0;
-#ifdef CONFIG_SPARSEMEM_ALLOC_MEM_MAP_TOGETHER
-	int size2;
-	struct page **map_map;
-#endif
 
 	/* see include/linux/mmzone.h 'struct mem_section' definition */
 	BUILD_BUG_ON(!is_power_of_2(sizeof(struct mem_section)));
@@ -578,7 +558,6 @@ void __init sparse_init(void)
 				(void *)usemap_map,
 				sizeof(usemap_map[0]));
 
-#ifdef CONFIG_SPARSEMEM_ALLOC_MEM_MAP_TOGETHER
 	size2 = sizeof(struct page *) * nr_present_sections;
 	map_map = memblock_virt_alloc(size2, 0);
 	if (!map_map)
@@ -586,7 +565,6 @@ void __init sparse_init(void)
 	alloc_usemap_and_memmap(sparse_early_mem_maps_alloc_node,
 				(void *)map_map,
 				sizeof(map_map[0]));
-#endif
 
 	/*
 	 * The number of present sections stored in nr_present_sections
@@ -614,11 +592,7 @@ void __init sparse_init(void)
 			continue;
 		}
 
-#ifdef CONFIG_SPARSEMEM_ALLOC_MEM_MAP_TOGETHER
 		map = map_map[nr_consumed_maps];
-#else
-		map = sparse_early_mem_map_alloc(pnum);
-#endif
 		if (!map) {
 			ms->section_mem_map = 0;
 			nr_consumed_maps++;
@@ -632,9 +606,7 @@ void __init sparse_init(void)
 
 	vmemmap_populate_print_last();
 
-#ifdef CONFIG_SPARSEMEM_ALLOC_MEM_MAP_TOGETHER
 	memblock_free_early(__pa(map_map), size2);
-#endif
 	memblock_free_early(__pa(usemap_map), size);
 }
 
_

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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