From 837566e7e08e3f89444166444836a8a49b9f9322 Mon Sep 17 00:00:00 2001 From: Alexander Duyck Date: Mon, 13 May 2019 17:21:17 -0700 Subject: mm: implement new zone specific memblock iterator Introduce a new iterator for_each_free_mem_pfn_range_in_zone. This iterator will take care of making sure a given memory range provided is in fact contained within a zone. It takes are of all the bounds checking we were doing in deferred_grow_zone, and deferred_init_memmap. In addition it should help to speed up the search a bit by iterating until the end of a range is greater than the start of the zone pfn range, and will exit completely if the start is beyond the end of the zone. Link: http://lkml.kernel.org/r/20190405221225.12227.22573.stgit@localhost.localdomain Signed-off-by: Alexander Duyck Reviewed-by: Pavel Tatashin Reviewed-by: Mike Rapoport Cc: Dan Williams Cc: Dave Jiang Cc: David S. Miller Cc: Ingo Molnar Cc: Khalid Aziz Cc: "Kirill A. Shutemov" Cc: Laurent Dufour Cc: Matthew Wilcox Cc: Mel Gorman Cc: Michal Hocko Cc: Mike Rapoport Cc: Pavel Tatashin Cc: Vlastimil Babka Cc: Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/page_alloc.c | 31 ++++++++++++------------------- 1 file changed, 12 insertions(+), 19 deletions(-) (limited to 'mm/page_alloc.c') 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) -- cgit v1.2.3-58-ga151