The patch titled
Subject: mm/sparse: Remove CONFIG_SPARSEMEM_ALLOC_MEM_MAP_TOGETHER
has been added to the -mm tree. Its filename is
mm-sparse-remove-config_sparsemem_alloc_mem_map_together.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-sparse-remove-config_sparsemem_alloc_mem_map_together.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-sparse-remove-config_sparsemem_alloc_mem_map_together.patch
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*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
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: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Cc: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
Cc: Oscar Salvador <osalvador@xxxxxxx>
Cc: Oscar Salvador <osalvador@xxxxxxxxxxxxxxxxxx>
Cc: Pankaj Gupta <pagupta@xxxxxxxxxx>
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 numner of present sections stored in nr_present_sections
* are kept the same since mem sections are marked as present in
@@ -612,11 +590,7 @@ 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++;
@@ -630,9 +604,7 @@ 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
mm-sparse-remove-config_sparsemem_alloc_mem_map_together.patch
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