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authorLinus Torvalds <torvalds@linux-foundation.org>2015-07-01 17:47:51 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2015-07-01 17:47:51 -0700
commit2d01eedf1d14432f4db5388a49dc5596a8c5bd02 (patch)
tree646525acc0475b2899827c1bfbd25f05ec1b8092 /mm
parent6ac15baacb6ecd87c66209627753b96ded3b4515 (diff)
parentabdd4a7025282fbe3737e1bcb5f51afc8d8ea1b8 (diff)
downloadlwn-2d01eedf1d14432f4db5388a49dc5596a8c5bd02.tar.gz
lwn-2d01eedf1d14432f4db5388a49dc5596a8c5bd02.zip
Merge branch 'akpm' (patches from Andrew)
Merge third patchbomb from Andrew Morton: - the rest of MM - scripts/gdb updates - ipc/ updates - lib/ updates - MAINTAINERS updates - various other misc things * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (67 commits) genalloc: rename of_get_named_gen_pool() to of_gen_pool_get() genalloc: rename dev_get_gen_pool() to gen_pool_get() x86: opt into HAVE_COPY_THREAD_TLS, for both 32-bit and 64-bit MAINTAINERS: add zpool MAINTAINERS: BCACHE: Kent Overstreet has changed email address MAINTAINERS: move Jens Osterkamp to CREDITS MAINTAINERS: remove unused nbd.h pattern MAINTAINERS: update brcm gpio filename pattern MAINTAINERS: update brcm dts pattern MAINTAINERS: update sound soc intel patterns MAINTAINERS: remove website for paride MAINTAINERS: update Emulex ocrdma email addresses bcache: use kvfree() in various places libcxgbi: use kvfree() in cxgbi_free_big_mem() target: use kvfree() in session alloc and free IB/ehca: use kvfree() in ipz_queue_{cd}tor() drm/nouveau/gem: use kvfree() in u_free() drm: use kvfree() in drm_free_large() cxgb4: use kvfree() in t4_free_mem() cxgb3: use kvfree() in cxgb_free_mem() ...
Diffstat (limited to 'mm')
-rw-r--r--mm/Kconfig18
-rw-r--r--mm/bootmem.c13
-rw-r--r--mm/internal.h11
-rw-r--r--mm/memblock.c34
-rw-r--r--mm/mm_init.c9
-rw-r--r--mm/nobootmem.c7
-rw-r--r--mm/page_alloc.c442
7 files changed, 453 insertions, 81 deletions
diff --git a/mm/Kconfig b/mm/Kconfig
index c180af880ed5..e79de2bd12cd 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -636,3 +636,21 @@ config MAX_STACK_SIZE_MB
changed to a smaller value in which case that is used.
A sane initial value is 80 MB.
+
+# For architectures that support deferred memory initialisation
+config ARCH_SUPPORTS_DEFERRED_STRUCT_PAGE_INIT
+ bool
+
+config DEFERRED_STRUCT_PAGE_INIT
+ bool "Defer initialisation of struct pages to kswapd"
+ default n
+ depends on ARCH_SUPPORTS_DEFERRED_STRUCT_PAGE_INIT
+ depends on MEMORY_HOTPLUG
+ help
+ Ordinarily all struct pages are initialised during early boot in a
+ single thread. On very large machines this can take a considerable
+ amount of time. If this option is set, large machines will bring up
+ a subset of memmap at boot and then initialise the rest in parallel
+ when kswapd starts. This has a potential performance impact on
+ processes running early in the lifetime of the systemm until kswapd
+ finishes the initialisation.
diff --git a/mm/bootmem.c b/mm/bootmem.c
index 477be696511d..a23dd1934654 100644
--- a/mm/bootmem.c
+++ b/mm/bootmem.c
@@ -164,7 +164,7 @@ void __init free_bootmem_late(unsigned long physaddr, unsigned long size)
end = PFN_DOWN(physaddr + size);
for (; cursor < end; cursor++) {
- __free_pages_bootmem(pfn_to_page(cursor), 0);
+ __free_pages_bootmem(pfn_to_page(cursor), cursor, 0);
totalram_pages++;
}
}
@@ -172,7 +172,7 @@ void __init free_bootmem_late(unsigned long physaddr, unsigned long size)
static unsigned long __init free_all_bootmem_core(bootmem_data_t *bdata)
{
struct page *page;
- unsigned long *map, start, end, pages, count = 0;
+ unsigned long *map, start, end, pages, cur, count = 0;
if (!bdata->node_bootmem_map)
return 0;
@@ -210,17 +210,17 @@ static unsigned long __init free_all_bootmem_core(bootmem_data_t *bdata)
if (IS_ALIGNED(start, BITS_PER_LONG) && vec == ~0UL) {
int order = ilog2(BITS_PER_LONG);
- __free_pages_bootmem(pfn_to_page(start), order);
+ __free_pages_bootmem(pfn_to_page(start), start, order);
count += BITS_PER_LONG;
start += BITS_PER_LONG;
} else {
- unsigned long cur = start;
+ cur = start;
start = ALIGN(start + 1, BITS_PER_LONG);
while (vec && cur != start) {
if (vec & 1) {
page = pfn_to_page(cur);
- __free_pages_bootmem(page, 0);
+ __free_pages_bootmem(page, cur, 0);
count++;
}
vec >>= 1;
@@ -229,12 +229,13 @@ static unsigned long __init free_all_bootmem_core(bootmem_data_t *bdata)
}
}
+ cur = bdata->node_min_pfn;
page = virt_to_page(bdata->node_bootmem_map);
pages = bdata->node_low_pfn - bdata->node_min_pfn;
pages = bootmem_bootmap_pages(pages);
count += pages;
while (pages--)
- __free_pages_bootmem(page++, 0);
+ __free_pages_bootmem(page++, cur++, 0);
bdebug("nid=%td released=%lx\n", bdata - bootmem_node_data, count);
diff --git a/mm/internal.h b/mm/internal.h
index a25e359a4039..36b23f1e2ca6 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -155,7 +155,8 @@ __find_buddy_index(unsigned long page_idx, unsigned int order)
}
extern int __isolate_free_page(struct page *page, unsigned int order);
-extern void __free_pages_bootmem(struct page *page, unsigned int order);
+extern void __free_pages_bootmem(struct page *page, unsigned long pfn,
+ unsigned int order);
extern void prep_compound_page(struct page *page, unsigned long order);
#ifdef CONFIG_MEMORY_FAILURE
extern bool is_free_buddy_page(struct page *page);
@@ -361,10 +362,7 @@ do { \
} while (0)
extern void mminit_verify_pageflags_layout(void);
-extern void mminit_verify_page_links(struct page *page,
- enum zone_type zone, unsigned long nid, unsigned long pfn);
extern void mminit_verify_zonelist(void);
-
#else
static inline void mminit_dprintk(enum mminit_level level,
@@ -376,11 +374,6 @@ static inline void mminit_verify_pageflags_layout(void)
{
}
-static inline void mminit_verify_page_links(struct page *page,
- enum zone_type zone, unsigned long nid, unsigned long pfn)
-{
-}
-
static inline void mminit_verify_zonelist(void)
{
}
diff --git a/mm/memblock.c b/mm/memblock.c
index 1b444c730846..87108e77e476 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -820,6 +820,38 @@ int __init_memblock memblock_mark_mirror(phys_addr_t base, phys_addr_t size)
/**
+ * __next_reserved_mem_region - next function for for_each_reserved_region()
+ * @idx: pointer to u64 loop variable
+ * @out_start: ptr to phys_addr_t for start address of the region, can be %NULL
+ * @out_end: ptr to phys_addr_t for end address of the region, can be %NULL
+ *
+ * Iterate over all reserved memory regions.
+ */
+void __init_memblock __next_reserved_mem_region(u64 *idx,
+ phys_addr_t *out_start,
+ phys_addr_t *out_end)
+{
+ struct memblock_type *rsv = &memblock.reserved;
+
+ if (*idx >= 0 && *idx < rsv->cnt) {
+ struct memblock_region *r = &rsv->regions[*idx];
+ phys_addr_t base = r->base;
+ phys_addr_t size = r->size;
+
+ if (out_start)
+ *out_start = base;
+ if (out_end)
+ *out_end = base + size - 1;
+
+ *idx += 1;
+ return;
+ }
+
+ /* signal end of iteration */
+ *idx = ULLONG_MAX;
+}
+
+/**
* __next__mem_range - next function for for_each_free_mem_range() etc.
* @idx: pointer to u64 loop variable
* @nid: node selector, %NUMA_NO_NODE for all nodes
@@ -1387,7 +1419,7 @@ void __init __memblock_free_late(phys_addr_t base, phys_addr_t size)
end = PFN_DOWN(base + size);
for (; cursor < end; cursor++) {
- __free_pages_bootmem(pfn_to_page(cursor), 0);
+ __free_pages_bootmem(pfn_to_page(cursor), cursor, 0);
totalram_pages++;
}
}
diff --git a/mm/mm_init.c b/mm/mm_init.c
index 5f420f7fafa1..fdadf918de76 100644
--- a/mm/mm_init.c
+++ b/mm/mm_init.c
@@ -11,6 +11,7 @@
#include <linux/export.h>
#include <linux/memory.h>
#include <linux/notifier.h>
+#include <linux/sched.h>
#include "internal.h"
#ifdef CONFIG_DEBUG_MEMORY_INIT
@@ -130,14 +131,6 @@ void __init mminit_verify_pageflags_layout(void)
BUG_ON(or_mask != add_mask);
}
-void __meminit mminit_verify_page_links(struct page *page, enum zone_type zone,
- unsigned long nid, unsigned long pfn)
-{
- BUG_ON(page_to_nid(page) != nid);
- BUG_ON(page_zonenum(page) != zone);
- BUG_ON(page_to_pfn(page) != pfn);
-}
-
static __init int set_mminit_loglevel(char *str)
{
get_option(&str, &mminit_loglevel);
diff --git a/mm/nobootmem.c b/mm/nobootmem.c
index 5258386fa1be..e57cf24babd6 100644
--- a/mm/nobootmem.c
+++ b/mm/nobootmem.c
@@ -86,7 +86,7 @@ void __init free_bootmem_late(unsigned long addr, unsigned long size)
end = PFN_DOWN(addr + size);
for (; cursor < end; cursor++) {
- __free_pages_bootmem(pfn_to_page(cursor), 0);
+ __free_pages_bootmem(pfn_to_page(cursor), cursor, 0);
totalram_pages++;
}
}
@@ -101,7 +101,7 @@ static void __init __free_pages_memory(unsigned long start, unsigned long end)
while (start + (1UL << order) > end)
order--;
- __free_pages_bootmem(pfn_to_page(start), order);
+ __free_pages_bootmem(pfn_to_page(start), start, order);
start += (1UL << order);
}
@@ -130,6 +130,9 @@ static unsigned long __init free_low_memory_core_early(void)
memblock_clear_hotplug(0, -1);
+ for_each_reserved_mem_region(i, &start, &end)
+ reserve_bootmem_region(start, end);
+
for_each_free_mem_range(i, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end,
NULL)
count += __free_memory_core(start, end);
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 5e6fa06f2784..506eac8b38af 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -18,6 +18,7 @@
#include <linux/mm.h>
#include <linux/swap.h>
#include <linux/interrupt.h>
+#include <linux/rwsem.h>
#include <linux/pagemap.h>
#include <linux/jiffies.h>
#include <linux/bootmem.h>
@@ -61,6 +62,7 @@
#include <linux/hugetlb.h>
#include <linux/sched/rt.h>
#include <linux/page_owner.h>
+#include <linux/kthread.h>
#include <asm/sections.h>
#include <asm/tlbflush.h>
@@ -235,6 +237,77 @@ EXPORT_SYMBOL(nr_online_nodes);
int page_group_by_mobility_disabled __read_mostly;
+#ifdef CONFIG_DEFERRED_STRUCT_PAGE_INIT
+static inline void reset_deferred_meminit(pg_data_t *pgdat)
+{
+ pgdat->first_deferred_pfn = ULONG_MAX;
+}
+
+/* Returns true if the struct page for the pfn is uninitialised */
+static inline bool __meminit early_page_uninitialised(unsigned long pfn)
+{
+ int nid = early_pfn_to_nid(pfn);
+
+ if (pfn >= NODE_DATA(nid)->first_deferred_pfn)
+ return true;
+
+ return false;
+}
+
+static inline bool early_page_nid_uninitialised(unsigned long pfn, int nid)
+{
+ if (pfn >= NODE_DATA(nid)->first_deferred_pfn)
+ return true;
+
+ return false;
+}
+
+/*
+ * Returns false when the remaining initialisation should be deferred until
+ * later in the boot cycle when it can be parallelised.
+ */
+static inline bool update_defer_init(pg_data_t *pgdat,
+ unsigned long pfn, unsigned long zone_end,
+ unsigned long *nr_initialised)
+{
+ /* Always populate low zones for address-contrained allocations */
+ if (zone_end < pgdat_end_pfn(pgdat))
+ return true;
+
+ /* Initialise at least 2G of the highest zone */
+ (*nr_initialised)++;
+ if (*nr_initialised > (2UL << (30 - PAGE_SHIFT)) &&
+ (pfn & (PAGES_PER_SECTION - 1)) == 0) {
+ pgdat->first_deferred_pfn = pfn;
+ return false;
+ }
+
+ return true;
+}
+#else
+static inline void reset_deferred_meminit(pg_data_t *pgdat)
+{
+}
+
+static inline bool early_page_uninitialised(unsigned long pfn)
+{
+ return false;
+}
+
+static inline bool early_page_nid_uninitialised(unsigned long pfn, int nid)
+{
+ return false;
+}
+
+static inline bool update_defer_init(pg_data_t *pgdat,
+ unsigned long pfn, unsigned long zone_end,
+ unsigned long *nr_initialised)
+{
+ return true;
+}
+#endif
+
+
void set_pageblock_migratetype(struct page *page, int migratetype)
{
if (unlikely(page_group_by_mobility_disabled &&
@@ -764,6 +837,75 @@ static int free_tail_pages_check(struct page *head_page, struct page *page)
return 0;
}
+static void __meminit __init_single_page(struct page *page, unsigned long pfn,
+ unsigned long zone, int nid)
+{
+ set_page_links(page, zone, nid, pfn);
+ init_page_count(page);
+ page_mapcount_reset(page);
+ page_cpupid_reset_last(page);
+
+ INIT_LIST_HEAD(&page->lru);
+#ifdef WANT_PAGE_VIRTUAL
+ /* The shift won't overflow because ZONE_NORMAL is below 4G. */
+ if (!is_highmem_idx(zone))
+ set_page_address(page, __va(pfn << PAGE_SHIFT));
+#endif
+}
+
+static void __meminit __init_single_pfn(unsigned long pfn, unsigned long zone,
+ int nid)
+{
+ return __init_single_page(pfn_to_page(pfn), pfn, zone, nid);
+}
+
+#ifdef CONFIG_DEFERRED_STRUCT_PAGE_INIT
+static void init_reserved_page(unsigned long pfn)
+{
+ pg_data_t *pgdat;
+ int nid, zid;
+
+ if (!early_page_uninitialised(pfn))
+ return;
+
+ nid = early_pfn_to_nid(pfn);
+ pgdat = NODE_DATA(nid);
+
+ for (zid = 0; zid < MAX_NR_ZONES; zid++) {
+ struct zone *zone = &pgdat->node_zones[zid];
+
+ if (pfn >= zone->zone_start_pfn && pfn < zone_end_pfn(zone))
+ break;
+ }
+ __init_single_pfn(pfn, zid, nid);
+}
+#else
+static inline void init_reserved_page(unsigned long pfn)
+{
+}
+#endif /* CONFIG_DEFERRED_STRUCT_PAGE_INIT */
+
+/*
+ * Initialised pages do not have PageReserved set. This function is
+ * called for each range allocated by the bootmem allocator and
+ * marks the pages PageReserved. The remaining valid pages are later
+ * sent to the buddy page allocator.
+ */
+void __meminit reserve_bootmem_region(unsigned long start, unsigned long end)
+{
+ unsigned long start_pfn = PFN_DOWN(start);
+ unsigned long end_pfn = PFN_UP(end);
+
+ for (; start_pfn < end_pfn; start_pfn++) {
+ if (pfn_valid(start_pfn)) {
+ struct page *page = pfn_to_page(start_pfn);
+
+ init_reserved_page(start_pfn);
+ SetPageReserved(page);
+ }
+ }
+}
+
static bool free_pages_prepare(struct page *page, unsigned int order)
{
bool compound = PageCompound(page);
@@ -818,7 +960,8 @@ static void __free_pages_ok(struct page *page, unsigned int order)
local_irq_restore(flags);
}
-void __init __free_pages_bootmem(struct page *page, unsigned int order)
+static void __init __free_pages_boot_core(struct page *page,
+ unsigned long pfn, unsigned int order)
{
unsigned int nr_pages = 1 << order;
struct page *p = page;
@@ -838,6 +981,223 @@ void __init __free_pages_bootmem(struct page *page, unsigned int order)
__free_pages(page, order);
}
+#if defined(CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID) || \
+ defined(CONFIG_HAVE_MEMBLOCK_NODE_MAP)
+/* Only safe to use early in boot when initialisation is single-threaded */
+static struct mminit_pfnnid_cache early_pfnnid_cache __meminitdata;
+
+int __meminit early_pfn_to_nid(unsigned long pfn)
+{
+ int nid;
+
+ /* The system will behave unpredictably otherwise */
+ BUG_ON(system_state != SYSTEM_BOOTING);
+
+ nid = __early_pfn_to_nid(pfn, &early_pfnnid_cache);
+ if (nid >= 0)
+ return nid;
+ /* just returns 0 */
+ return 0;
+}
+#endif
+
+#ifdef CONFIG_NODES_SPAN_OTHER_NODES
+static inline bool __meminit meminit_pfn_in_nid(unsigned long pfn, int node,
+ struct mminit_pfnnid_cache *state)
+{
+ int nid;
+
+ nid = __early_pfn_to_nid(pfn, state);
+ if (nid >= 0 && nid != node)
+ return false;
+ return true;
+}
+
+/* Only safe to use early in boot when initialisation is single-threaded */
+static inline bool __meminit early_pfn_in_nid(unsigned long pfn, int node)
+{
+ return meminit_pfn_in_nid(pfn, node, &early_pfnnid_cache);
+}
+
+#else
+
+static inline bool __meminit early_pfn_in_nid(unsigned long pfn, int node)
+{
+ return true;
+}
+static inline bool __meminit meminit_pfn_in_nid(unsigned long pfn, int node,
+ struct mminit_pfnnid_cache *state)
+{
+ return true;
+}
+#endif
+
+
+void __init __free_pages_bootmem(struct page *page, unsigned long pfn,
+ unsigned int order)
+{
+ if (early_page_uninitialised(pfn))
+ return;
+ return __free_pages_boot_core(page, pfn, order);
+}
+
+#ifdef CONFIG_DEFERRED_STRUCT_PAGE_INIT
+static void __init deferred_free_range(struct page *page,
+ unsigned long pfn, int nr_pages)
+{
+ int i;
+
+ if (!page)
+ return;
+
+ /* Free a large naturally-aligned chunk if possible */
+ if (nr_pages == MAX_ORDER_NR_PAGES &&
+ (pfn & (MAX_ORDER_NR_PAGES-1)) == 0) {
+ set_pageblock_migratetype(page, MIGRATE_MOVABLE);
+ __free_pages_boot_core(page, pfn, MAX_ORDER-1);
+ return;
+ }
+
+ for (i = 0; i < nr_pages; i++, page++, pfn++)
+ __free_pages_boot_core(page, pfn, 0);
+}
+
+static __initdata DECLARE_RWSEM(pgdat_init_rwsem);
+
+/* Initialise remaining memory on a node */
+static int __init deferred_init_memmap(void *data)
+{
+ pg_data_t *pgdat = data;
+ int nid = pgdat->node_id;
+ struct mminit_pfnnid_cache nid_init_state = { };
+ unsigned long start = jiffies;
+ unsigned long nr_pages = 0;
+ unsigned long walk_start, walk_end;
+ int i, zid;
+ struct zone *zone;
+ unsigned long first_init_pfn = pgdat->first_deferred_pfn;
+ const struct cpumask *cpumask = cpumask_of_node(pgdat->node_id);
+
+ if (first_init_pfn == ULONG_MAX) {
+ up_read(&pgdat_init_rwsem);
+ return 0;
+ }
+
+ /* Bind memory initialisation thread to a local node if possible */
+ if (!cpumask_empty(cpumask))
+ set_cpus_allowed_ptr(current, cpumask);
+
+ /* Sanity check boundaries */
+ BUG_ON(pgdat->first_deferred_pfn < pgdat->node_start_pfn);
+ BUG_ON(pgdat->first_deferred_pfn > pgdat_end_pfn(pgdat));
+ pgdat->first_deferred_pfn = ULONG_MAX;
+
+ /* Only the highest zone is deferred so find it */
+ for (zid = 0; zid < MAX_NR_ZONES; zid++) {
+ zone = pgdat->node_zones + zid;
+ if (first_init_pfn < zone_end_pfn(zone))
+ break;
+ }
+
+ for_each_mem_pfn_range(i, nid, &walk_start, &walk_end, NULL) {
+ unsigned long pfn, end_pfn;
+ struct page *page = NULL;
+ struct page *free_base_page = NULL;
+ unsigned long free_base_pfn = 0;
+ int nr_to_free = 0;
+
+ end_pfn = min(walk_end, zone_end_pfn(zone));
+ pfn = first_init_pfn;
+ if (pfn < walk_start)
+ pfn = walk_start;
+ if (pfn < zone->zone_start_pfn)
+ pfn = zone->zone_start_pfn;
+
+ for (; pfn < end_pfn; pfn++) {
+ if (!pfn_valid_within(pfn))
+ goto free_range;
+
+ /*
+ * Ensure pfn_valid is checked every
+ * MAX_ORDER_NR_PAGES for memory holes
+ */
+ if ((pfn & (MAX_ORDER_NR_PAGES - 1)) == 0) {
+ if (!pfn_valid(pfn)) {
+ page = NULL;
+ goto free_range;
+ }
+ }
+
+ if (!meminit_pfn_in_nid(pfn, nid, &nid_init_state)) {
+ page = NULL;
+ goto free_range;
+ }
+
+ /* Minimise pfn page lookups and scheduler checks */
+ if (page && (pfn & (MAX_ORDER_NR_PAGES - 1)) != 0) {
+ page++;
+ } else {
+ nr_pages += nr_to_free;
+ deferred_free_range(free_base_page,
+ free_base_pfn, nr_to_free);
+ free_base_page = NULL;
+ free_base_pfn = nr_to_free = 0;
+
+ page = pfn_to_page(pfn);
+ cond_resched();
+ }
+
+ if (page->flags) {
+ VM_BUG_ON(page_zone(page) != zone);
+ goto free_range;
+ }
+
+ __init_single_page(page, pfn, zid, nid);
+ if (!free_base_page) {
+ free_base_page = page;
+ free_base_pfn = pfn;
+ nr_to_free = 0;
+ }
+ nr_to_free++;
+
+ /* Where possible, batch up pages for a single free */
+ continue;
+free_range:
+ /* Free the current block of pages to allocator */
+ nr_pages += nr_to_free;
+ deferred_free_range(free_base_page, free_base_pfn,
+ nr_to_free);
+ free_base_page = NULL;
+ free_base_pfn = nr_to_free = 0;
+ }
+
+ first_init_pfn = max(end_pfn, first_init_pfn);
+ }
+
+ /* Sanity check that the next zone really is unpopulated */
+ WARN_ON(++zid < MAX_NR_ZONES && populated_zone(++zone));
+
+ pr_info("node %d initialised, %lu pages in %ums\n", nid, nr_pages,
+ jiffies_to_msecs(jiffies - start));
+ up_read(&pgdat_init_rwsem);
+ return 0;
+}
+
+void __init page_alloc_init_late(void)
+{
+ int nid;
+
+ for_each_node_state(nid, N_MEMORY) {
+ down_read(&pgdat_init_rwsem);
+ kthread_run(deferred_init_memmap, NODE_DATA(nid), "pgdatinit%d", nid);
+ }
+
+ /* Block until all are initialised */
+ down_write(&pgdat_init_rwsem);
+ up_write(&pgdat_init_rwsem);
+}
+#endif /* CONFIG_DEFERRED_STRUCT_PAGE_INIT */
+
#ifdef CONFIG_CMA
/* Free whole pageblock and set its migration type to MIGRATE_CMA. */
void __init init_cma_reserved_pageblock(struct page *page)
@@ -4150,6 +4510,9 @@ static void setup_zone_migrate_reserve(struct zone *zone)
zone->nr_migrate_reserve_block = reserve;
for (pfn = start_pfn; pfn < end_pfn; pfn += pageblock_nr_pages) {
+ if (!early_page_nid_uninitialised(pfn, zone_to_nid(zone)))
+ return;
+
if (!pfn_valid(pfn))
continue;
page = pfn_to_page(pfn);
@@ -4212,15 +4575,16 @@ static void setup_zone_migrate_reserve(struct zone *zone)
void __meminit memmap_init_zone(unsigned long size, int nid, unsigned long zone,
unsigned long start_pfn, enum memmap_context context)
{
- struct page *page;
+ pg_data_t *pgdat = NODE_DATA(nid);
unsigned long end_pfn = start_pfn + size;
unsigned long pfn;
struct zone *z;
+ unsigned long nr_initialised = 0;
if (highest_memmap_pfn < end_pfn - 1)
highest_memmap_pfn = end_pfn - 1;
- z = &NODE_DATA(nid)->node_zones[zone];
+ z = &pgdat->node_zones[zone];
for (pfn = start_pfn; pfn < end_pfn; pfn++) {
/*
* There can be holes in boot-time mem_map[]s
@@ -4232,14 +4596,11 @@ void __meminit memmap_init_zone(unsigned long size, int nid, unsigned long zone,
continue;
if (!early_pfn_in_nid(pfn, nid))
continue;
+ if (!update_defer_init(pgdat, pfn, end_pfn,
+ &nr_initialised))
+ break;
}
- page = pfn_to_page(pfn);
- set_page_links(page, zone, nid, pfn);
- mminit_verify_page_links(page, zone, nid, pfn);
- init_page_count(page);
- page_mapcount_reset(page);
- page_cpupid_reset_last(page);
- SetPageReserved(page);
+
/*
* Mark the block movable so that blocks are reserved for
* movable at startup. This will force kernel allocations
@@ -4254,17 +4615,14 @@ void __meminit memmap_init_zone(unsigned long size, int nid, unsigned long zone,
* check here not to call set_pageblock_migratetype() against
* pfn out of zone.
*/
- if ((z->zone_start_pfn <= pfn)
- && (pfn < zone_end_pfn(z))
- && !(pfn & (pageblock_nr_pages - 1)))
- set_pageblock_migratetype(page, MIGRATE_MOVABLE);
+ if (!(pfn & (pageblock_nr_pages - 1))) {
+ struct page *page = pfn_to_page(pfn);
- INIT_LIST_HEAD(&page->lru);
-#ifdef WANT_PAGE_VIRTUAL
- /* The shift won't overflow because ZONE_NORMAL is below 4G. */
- if (!is_highmem_idx(zone))
- set_page_address(page, __va(pfn << PAGE_SHIFT));
-#endif
+ __init_single_page(page, pfn, zone, nid);
+ set_pageblock_migratetype(page, MIGRATE_MOVABLE);
+ } else {
+ __init_single_pfn(pfn, zone, nid);
+ }
}
}
@@ -4522,57 +4880,30 @@ int __meminit init_currently_empty_zone(struct zone *zone,
#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
#ifndef CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID
+
/*
* Required by SPARSEMEM. Given a PFN, return what node the PFN is on.
*/
-int __meminit __early_pfn_to_nid(unsigned long pfn)
+int __meminit __early_pfn_to_nid(unsigned long pfn,
+ struct mminit_pfnnid_cache *state)
{
unsigned long start_pfn, end_pfn;
int nid;
- /*
- * NOTE: The following SMP-unsafe globals are only used early in boot
- * when the kernel is running single-threaded.
- */
- static unsigned long __meminitdata last_start_pfn, last_end_pfn;
- static int __meminitdata last_nid;
- if (last_start_pfn <= pfn && pfn < last_end_pfn)
- return last_nid;
+ if (state->last_start <= pfn && pfn < state->last_end)
+ return state->last_nid;
nid = memblock_search_pfn_nid(pfn, &start_pfn, &end_pfn);
if (nid != -1) {
- last_start_pfn = start_pfn;
- last_end_pfn = end_pfn;
- last_nid = nid;
+ state->last_start = start_pfn;
+ state->last_end = end_pfn;
+ state->last_nid = nid;
}
return nid;
}
#endif /* CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID */
-int __meminit early_pfn_to_nid(unsigned long pfn)
-{
- int nid;
-
- nid = __early_pfn_to_nid(pfn);
- if (nid >= 0)
- return nid;
- /* just returns 0 */
- return 0;
-}
-
-#ifdef CONFIG_NODES_SPAN_OTHER_NODES
-bool __meminit early_pfn_in_nid(unsigned long pfn, int node)
-{
- int nid;
-
- nid = __early_pfn_to_nid(pfn);
- if (nid >= 0 && nid != node)
- return false;
- return true;
-}
-#endif
-
/**
* free_bootmem_with_active_regions - Call memblock_free_early_nid for each active range
* @nid: The node to free memory on. If MAX_NUMNODES, all nodes are freed.
@@ -5090,6 +5421,7 @@ void __paginginit free_area_init_node(int nid, unsigned long *zones_size,
/* pg_data_t should be reset to zero when it's allocated */
WARN_ON(pgdat->nr_zones || pgdat->classzone_idx);
+ reset_deferred_meminit(pgdat);
pgdat->node_id = nid;
pgdat->node_start_pfn = node_start_pfn;
#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP