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mm/page_alloc: make deferred page init free pages in MAX_ORDER blocks
Normal page init path frees pages during the boot in MAX_ORDER chunks, but deferred page init path does it in pageblock blocks. Change deferred page init path to work in MAX_ORDER blocks. For cases when MAX_ORDER is larger than pageblock, set migrate type to MIGRATE_MOVABLE for all pageblocks covered by the page. Link: https://lkml.kernel.org/r/20230321002415.20843-1-kirill.shutemov@linux.intel.com Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Reviewed-by: Vlastimil Babka <vbabka@suse.cz> Acked-by: David Hildenbrand <david@redhat.com> Acked-by: Mel Gorman <mgorman@suse.de> Acked-by: Mike Rapoport (IBM) <rppt@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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@ -32,6 +32,8 @@
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#endif
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#define MAX_ORDER_NR_PAGES (1 << MAX_ORDER)
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#define IS_MAX_ORDER_ALIGNED(pfn) IS_ALIGNED(pfn, MAX_ORDER_NR_PAGES)
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/*
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* PAGE_ALLOC_COSTLY_ORDER is the order at which allocations are deemed
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* costly to service. That is between allocation orders which should
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19
mm/mm_init.c
19
mm/mm_init.c
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@ -1951,9 +1951,10 @@ static void __init deferred_free_range(unsigned long pfn,
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page = pfn_to_page(pfn);
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/* Free a large naturally-aligned chunk if possible */
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if (nr_pages == pageblock_nr_pages && pageblock_aligned(pfn)) {
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set_pageblock_migratetype(page, MIGRATE_MOVABLE);
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__free_pages_core(page, pageblock_order);
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if (nr_pages == MAX_ORDER_NR_PAGES && IS_MAX_ORDER_ALIGNED(pfn)) {
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for (i = 0; i < nr_pages; i += pageblock_nr_pages)
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set_pageblock_migratetype(page + i, MIGRATE_MOVABLE);
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__free_pages_core(page, MAX_ORDER);
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return;
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}
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@ -1977,19 +1978,19 @@ static inline void __init pgdat_init_report_one_done(void)
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/*
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* Returns true if page needs to be initialized or freed to buddy allocator.
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*
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* We check if a current large page is valid by only checking the validity
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* We check if a current MAX_ORDER block is valid by only checking the validity
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* of the head pfn.
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*/
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static inline bool __init deferred_pfn_valid(unsigned long pfn)
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{
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if (pageblock_aligned(pfn) && !pfn_valid(pfn))
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if (IS_MAX_ORDER_ALIGNED(pfn) && !pfn_valid(pfn))
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return false;
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return true;
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}
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/*
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* Free pages to buddy allocator. Try to free aligned pages in
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* pageblock_nr_pages sizes.
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* MAX_ORDER_NR_PAGES sizes.
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*/
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static void __init deferred_free_pages(unsigned long pfn,
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unsigned long end_pfn)
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@ -2000,7 +2001,7 @@ static void __init deferred_free_pages(unsigned long pfn,
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if (!deferred_pfn_valid(pfn)) {
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deferred_free_range(pfn - nr_free, nr_free);
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nr_free = 0;
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} else if (pageblock_aligned(pfn)) {
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} else if (IS_MAX_ORDER_ALIGNED(pfn)) {
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deferred_free_range(pfn - nr_free, nr_free);
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nr_free = 1;
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} else {
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@ -2013,7 +2014,7 @@ static void __init deferred_free_pages(unsigned long pfn,
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/*
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* Initialize struct pages. We minimize pfn page lookups and scheduler checks
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* by performing it only once every pageblock_nr_pages.
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* by performing it only once every MAX_ORDER_NR_PAGES.
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* Return number of pages initialized.
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*/
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static unsigned long __init deferred_init_pages(struct zone *zone,
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@ -2029,7 +2030,7 @@ static unsigned long __init deferred_init_pages(struct zone *zone,
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if (!deferred_pfn_valid(pfn)) {
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page = NULL;
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continue;
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} else if (!page || pageblock_aligned(pfn)) {
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} else if (!page || IS_MAX_ORDER_ALIGNED(pfn)) {
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page = pfn_to_page(pfn);
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} else {
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page++;
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