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Diffstat (limited to 'mm/sparse.c')
-rw-r--r--mm/sparse.c81
1 files changed, 40 insertions, 41 deletions
diff --git a/mm/sparse.c b/mm/sparse.c
index b29534cea8c0..41bef8e1f65c 100644
--- a/mm/sparse.c
+++ b/mm/sparse.c
@@ -288,33 +288,31 @@ struct page *sparse_decode_mem_map(unsigned long coded_mem_map, unsigned long pn
static void __meminit sparse_init_one_section(struct mem_section *ms,
unsigned long pnum, struct page *mem_map,
- unsigned long *pageblock_bitmap)
+ struct mem_section_usage *usage)
{
ms->section_mem_map &= ~SECTION_MAP_MASK;
ms->section_mem_map |= sparse_encode_mem_map(mem_map, pnum) |
SECTION_HAS_MEM_MAP;
- ms->pageblock_flags = pageblock_bitmap;
+ ms->usage = usage;
}
-unsigned long usemap_size(void)
+static unsigned long usemap_size(void)
{
return BITS_TO_LONGS(SECTION_BLOCKFLAGS_BITS) * sizeof(unsigned long);
}
-#ifdef CONFIG_MEMORY_HOTPLUG
-static unsigned long *__kmalloc_section_usemap(void)
+size_t mem_section_usage_size(void)
{
- return kmalloc(usemap_size(), GFP_KERNEL);
+ return sizeof(struct mem_section_usage) + usemap_size();
}
-#endif /* CONFIG_MEMORY_HOTPLUG */
#ifdef CONFIG_MEMORY_HOTREMOVE
-static unsigned long * __init
+static struct mem_section_usage * __init
sparse_early_usemaps_alloc_pgdat_section(struct pglist_data *pgdat,
unsigned long size)
{
+ struct mem_section_usage *usage;
unsigned long goal, limit;
- unsigned long *p;
int nid;
/*
* A page may contain usemaps for other sections preventing the
@@ -330,15 +328,16 @@ sparse_early_usemaps_alloc_pgdat_section(struct pglist_data *pgdat,
limit = goal + (1UL << PA_SECTION_SHIFT);
nid = early_pfn_to_nid(goal >> PAGE_SHIFT);
again:
- p = memblock_alloc_try_nid(size, SMP_CACHE_BYTES, goal, limit, nid);
- if (!p && limit) {
+ usage = memblock_alloc_try_nid(size, SMP_CACHE_BYTES, goal, limit, nid);
+ if (!usage && limit) {
limit = 0;
goto again;
}
- return p;
+ return usage;
}
-static void __init check_usemap_section_nr(int nid, unsigned long *usemap)
+static void __init check_usemap_section_nr(int nid,
+ struct mem_section_usage *usage)
{
unsigned long usemap_snr, pgdat_snr;
static unsigned long old_usemap_snr;
@@ -352,7 +351,7 @@ static void __init check_usemap_section_nr(int nid, unsigned long *usemap)
old_pgdat_snr = NR_MEM_SECTIONS;
}
- usemap_snr = pfn_to_section_nr(__pa(usemap) >> PAGE_SHIFT);
+ usemap_snr = pfn_to_section_nr(__pa(usage) >> PAGE_SHIFT);
pgdat_snr = pfn_to_section_nr(__pa(pgdat) >> PAGE_SHIFT);
if (usemap_snr == pgdat_snr)
return;
@@ -380,14 +379,15 @@ static void __init check_usemap_section_nr(int nid, unsigned long *usemap)
usemap_snr, pgdat_snr, nid);
}
#else
-static unsigned long * __init
+static struct mem_section_usage * __init
sparse_early_usemaps_alloc_pgdat_section(struct pglist_data *pgdat,
unsigned long size)
{
return memblock_alloc_node(size, SMP_CACHE_BYTES, pgdat->node_id);
}
-static void __init check_usemap_section_nr(int nid, unsigned long *usemap)
+static void __init check_usemap_section_nr(int nid,
+ struct mem_section_usage *usage)
{
}
#endif /* CONFIG_MEMORY_HOTREMOVE */
@@ -474,14 +474,13 @@ static void __init sparse_init_nid(int nid, unsigned long pnum_begin,
unsigned long pnum_end,
unsigned long map_count)
{
- unsigned long pnum, usemap_longs, *usemap;
+ struct mem_section_usage *usage;
+ unsigned long pnum;
struct page *map;
- usemap_longs = BITS_TO_LONGS(SECTION_BLOCKFLAGS_BITS);
- usemap = sparse_early_usemaps_alloc_pgdat_section(NODE_DATA(nid),
- usemap_size() *
- map_count);
- if (!usemap) {
+ usage = sparse_early_usemaps_alloc_pgdat_section(NODE_DATA(nid),
+ mem_section_usage_size() * map_count);
+ if (!usage) {
pr_err("%s: node[%d] usemap allocation failed", __func__, nid);
goto failed;
}
@@ -497,9 +496,9 @@ static void __init sparse_init_nid(int nid, unsigned long pnum_begin,
pnum_begin = pnum;
goto failed;
}
- check_usemap_section_nr(nid, usemap);
- sparse_init_one_section(__nr_to_section(pnum), pnum, map, usemap);
- usemap += usemap_longs;
+ check_usemap_section_nr(nid, usage);
+ sparse_init_one_section(__nr_to_section(pnum), pnum, map, usage);
+ usage = (void *) usage + mem_section_usage_size();
}
sparse_buffer_fini();
return;
@@ -697,9 +696,9 @@ int __meminit sparse_add_one_section(int nid, unsigned long start_pfn,
struct vmem_altmap *altmap)
{
unsigned long section_nr = pfn_to_section_nr(start_pfn);
+ struct mem_section_usage *usage;
struct mem_section *ms;
struct page *memmap;
- unsigned long *usemap;
int ret;
/*
@@ -713,8 +712,8 @@ int __meminit sparse_add_one_section(int nid, unsigned long start_pfn,
memmap = kmalloc_section_memmap(section_nr, nid, altmap);
if (!memmap)
return -ENOMEM;
- usemap = __kmalloc_section_usemap();
- if (!usemap) {
+ usage = kzalloc(mem_section_usage_size(), GFP_KERNEL);
+ if (!usage) {
__kfree_section_memmap(memmap, altmap);
return -ENOMEM;
}
@@ -733,11 +732,11 @@ int __meminit sparse_add_one_section(int nid, unsigned long start_pfn,
set_section_nid(section_nr, nid);
section_mark_present(ms);
- sparse_init_one_section(ms, section_nr, memmap, usemap);
+ sparse_init_one_section(ms, section_nr, memmap, usage);
out:
if (ret < 0) {
- kfree(usemap);
+ kfree(usage);
__kfree_section_memmap(memmap, altmap);
}
return ret;
@@ -773,20 +772,20 @@ static inline void clear_hwpoisoned_pages(struct page *memmap, int nr_pages)
}
#endif
-static void free_section_usemap(struct page *memmap, unsigned long *usemap,
- struct vmem_altmap *altmap)
+static void free_section_usage(struct page *memmap,
+ struct mem_section_usage *usage, struct vmem_altmap *altmap)
{
- struct page *usemap_page;
+ struct page *usage_page;
- if (!usemap)
+ if (!usage)
return;
- usemap_page = virt_to_page(usemap);
+ usage_page = virt_to_page(usage);
/*
* Check to see if allocation came from hot-plug-add
*/
- if (PageSlab(usemap_page) || PageCompound(usemap_page)) {
- kfree(usemap);
+ if (PageSlab(usage_page) || PageCompound(usage_page)) {
+ kfree(usage);
if (memmap)
__kfree_section_memmap(memmap, altmap);
return;
@@ -805,18 +804,18 @@ void sparse_remove_one_section(struct mem_section *ms, unsigned long map_offset,
struct vmem_altmap *altmap)
{
struct page *memmap = NULL;
- unsigned long *usemap = NULL;
+ struct mem_section_usage *usage = NULL;
if (ms->section_mem_map) {
- usemap = ms->pageblock_flags;
+ usage = ms->usage;
memmap = sparse_decode_mem_map(ms->section_mem_map,
__section_nr(ms));
ms->section_mem_map = 0;
- ms->pageblock_flags = NULL;
+ ms->usage = NULL;
}
clear_hwpoisoned_pages(memmap + map_offset,
PAGES_PER_SECTION - map_offset);
- free_section_usemap(memmap, usemap, altmap);
+ free_section_usage(memmap, usage, altmap);
}
#endif /* CONFIG_MEMORY_HOTPLUG */
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-12 08:08:26 +0000