diff options
| -rw-r--r-- | include/linux/memblock.h | 25 | ||||
| -rw-r--r-- | mm/memblock.c | 64 | ||||
| -rw-r--r-- | mm/page_alloc.c | 31 |
3 files changed, 101 insertions, 19 deletions
diff --git a/include/linux/memblock.h b/include/linux/memblock.h index 294d5d80e150..f8b78892b977 100644 --- a/include/linux/memblock.h +++ b/include/linux/memblock.h @@ -240,6 +240,31 @@ void __next_mem_pfn_range(int *idx, int nid, unsigned long *out_start_pfn, i >= 0; __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid)) #endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */ +#ifdef CONFIG_DEFERRED_STRUCT_PAGE_INIT +void __next_mem_pfn_range_in_zone(u64 *idx, struct zone *zone, + unsigned long *out_spfn, + unsigned long *out_epfn); +/** + * for_each_free_mem_range_in_zone - iterate through zone specific free + * memblock areas + * @i: u64 used as loop variable + * @zone: zone in which all of the memory blocks reside + * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL + * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL + * + * Walks over free (memory && !reserved) areas of memblock in a specific + * zone. Available once memblock and an empty zone is initialized. The main + * assumption is that the zone start, end, and pgdat have been associated. + * This way we can use the zone to determine NUMA node, and if a given part + * of the memblock is valid for the zone. + */ +#define for_each_free_mem_pfn_range_in_zone(i, zone, p_start, p_end) \ + for (i = 0, \ + __next_mem_pfn_range_in_zone(&i, zone, p_start, p_end); \ + i != U64_MAX; \ + __next_mem_pfn_range_in_zone(&i, zone, p_start, p_end)) +#endif /* CONFIG_DEFERRED_STRUCT_PAGE_INIT */ + /** * for_each_free_mem_range - iterate through free memblock areas * @i: u64 used as loop variable diff --git a/mm/memblock.c b/mm/memblock.c index a48f520c2d01..f315eca9f4a1 100644 --- a/mm/memblock.c +++ b/mm/memblock.c @@ -1255,6 +1255,70 @@ int __init_memblock memblock_set_node(phys_addr_t base, phys_addr_t size, return 0; } #endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */ +#ifdef CONFIG_DEFERRED_STRUCT_PAGE_INIT +/** + * __next_mem_pfn_range_in_zone - iterator for for_each_*_range_in_zone() + * + * @idx: pointer to u64 loop variable + * @zone: zone in which all of the memory blocks reside + * @out_spfn: ptr to ulong for start pfn of the range, can be %NULL + * @out_epfn: ptr to ulong for end pfn of the range, can be %NULL + * + * This function is meant to be a zone/pfn specific wrapper for the + * for_each_mem_range type iterators. Specifically they are used in the + * deferred memory init routines and as such we were duplicating much of + * this logic throughout the code. So instead of having it in multiple + * locations it seemed like it would make more sense to centralize this to + * one new iterator that does everything they need. + */ +void __init_memblock +__next_mem_pfn_range_in_zone(u64 *idx, struct zone *zone, + unsigned long *out_spfn, unsigned long *out_epfn) +{ + int zone_nid = zone_to_nid(zone); + phys_addr_t spa, epa; + int nid; + + __next_mem_range(idx, zone_nid, MEMBLOCK_NONE, + &memblock.memory, &memblock.reserved, + &spa, &epa, &nid); + + while (*idx != U64_MAX) { + unsigned long epfn = PFN_DOWN(epa); + unsigned long spfn = PFN_UP(spa); + + /* + * Verify the end is at least past the start of the zone and + * that we have at least one PFN to initialize. + */ + if (zone->zone_start_pfn < epfn && spfn < epfn) { + /* if we went too far just stop searching */ + if (zone_end_pfn(zone) <= spfn) { + *idx = U64_MAX; + break; + } + + if (out_spfn) + *out_spfn = max(zone->zone_start_pfn, spfn); + if (out_epfn) + *out_epfn = min(zone_end_pfn(zone), epfn); + + return; + } + + __next_mem_range(idx, zone_nid, MEMBLOCK_NONE, + &memblock.memory, &memblock.reserved, + &spa, &epa, &nid); + } + + /* signal end of iteration */ + if (out_spfn) + *out_spfn = ULONG_MAX; + if (out_epfn) + *out_epfn = 0; +} + +#endif /* CONFIG_DEFERRED_STRUCT_PAGE_INIT */ /** * memblock_alloc_range_nid - allocate boot memory block diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 25b82be438d7..fd42321c02f0 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -1631,11 +1631,9 @@ static unsigned long __init deferred_init_pages(struct zone *zone, static int __init deferred_init_memmap(void *data) { pg_data_t *pgdat = data; - int nid = pgdat->node_id; unsigned long start = jiffies; unsigned long nr_pages = 0; unsigned long spfn, epfn, first_init_pfn, flags; - phys_addr_t spa, epa; int zid; struct zone *zone; const struct cpumask *cpumask = cpumask_of_node(pgdat->node_id); @@ -1672,14 +1670,12 @@ static int __init deferred_init_memmap(void *data) * freeing pages we can access pages that are ahead (computing buddy * page in __free_one_page()). */ - for_each_free_mem_range(i, nid, MEMBLOCK_NONE, &spa, &epa, NULL) { - spfn = max_t(unsigned long, first_init_pfn, PFN_UP(spa)); - epfn = min_t(unsigned long, zone_end_pfn(zone), PFN_DOWN(epa)); + for_each_free_mem_pfn_range_in_zone(i, zone, &spfn, &epfn) { + spfn = max_t(unsigned long, first_init_pfn, spfn); nr_pages += deferred_init_pages(zone, spfn, epfn); } - for_each_free_mem_range(i, nid, MEMBLOCK_NONE, &spa, &epa, NULL) { - spfn = max_t(unsigned long, first_init_pfn, PFN_UP(spa)); - epfn = min_t(unsigned long, zone_end_pfn(zone), PFN_DOWN(epa)); + for_each_free_mem_pfn_range_in_zone(i, zone, &spfn, &epfn) { + spfn = max_t(unsigned long, first_init_pfn, spfn); deferred_free_pages(spfn, epfn); } pgdat_resize_unlock(pgdat, &flags); @@ -1687,8 +1683,8 @@ static int __init deferred_init_memmap(void *data) /* 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)); + pr_info("node %d initialised, %lu pages in %ums\n", + pgdat->node_id, nr_pages, jiffies_to_msecs(jiffies - start)); pgdat_init_report_one_done(); return 0; @@ -1712,13 +1708,11 @@ static int __init deferred_init_memmap(void *data) static noinline bool __init deferred_grow_zone(struct zone *zone, unsigned int order) { - int nid = zone_to_nid(zone); - pg_data_t *pgdat = NODE_DATA(nid); unsigned long nr_pages_needed = ALIGN(1 << order, PAGES_PER_SECTION); + pg_data_t *pgdat = zone->zone_pgdat; unsigned long nr_pages = 0; unsigned long first_init_pfn, spfn, epfn, t, flags; unsigned long first_deferred_pfn = pgdat->first_deferred_pfn; - phys_addr_t spa, epa; u64 i; /* Only the last zone may have deferred pages */ @@ -1754,9 +1748,8 @@ deferred_grow_zone(struct zone *zone, unsigned int order) return false; } - for_each_free_mem_range(i, nid, MEMBLOCK_NONE, &spa, &epa, NULL) { - spfn = max_t(unsigned long, first_init_pfn, PFN_UP(spa)); - epfn = min_t(unsigned long, zone_end_pfn(zone), PFN_DOWN(epa)); + for_each_free_mem_pfn_range_in_zone(i, zone, &spfn, &epfn) { + spfn = max_t(unsigned long, first_init_pfn, spfn); while (spfn < epfn && nr_pages < nr_pages_needed) { t = ALIGN(spfn + PAGES_PER_SECTION, PAGES_PER_SECTION); @@ -1770,9 +1763,9 @@ deferred_grow_zone(struct zone *zone, unsigned int order) break; } - for_each_free_mem_range(i, nid, MEMBLOCK_NONE, &spa, &epa, NULL) { - spfn = max_t(unsigned long, first_init_pfn, PFN_UP(spa)); - epfn = min_t(unsigned long, first_deferred_pfn, PFN_DOWN(epa)); + for_each_free_mem_pfn_range_in_zone(i, zone, &spfn, &epfn) { + spfn = max_t(unsigned long, first_init_pfn, spfn); + epfn = min_t(unsigned long, first_deferred_pfn, epfn); deferred_free_pages(spfn, epfn); if (first_deferred_pfn == epfn) |