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authorMike Kravetz <mike.kravetz@oracle.com>2023-10-18 19:31:05 -0700
committerAndrew Morton <akpm@linux-foundation.org>2023-10-25 16:47:07 -0700
commit79359d6d24df2f304abbf6f137b01d2b76175ce3 (patch)
treec802c2633cb50fb4f6fdd17bed75cc6b64e4eb3a /mm/hugetlb.c
parentd67e32f26713c35669e343edfdce6fa97a7d6bbc (diff)
hugetlb: perform vmemmap optimization on a list of pages
When adding hugetlb pages to the pool, we first create a list of the allocated pages before adding to the pool. Pass this list of pages to a new routine hugetlb_vmemmap_optimize_folios() for vmemmap optimization. Due to significant differences in vmemmmap initialization for bootmem allocated hugetlb pages, a new routine prep_and_add_bootmem_folios is created. We also modify the routine vmemmap_should_optimize() to check for pages that are already optimized. There are code paths that might request vmemmap optimization twice and we want to make sure this is not attempted. Link: https://lkml.kernel.org/r/20231019023113.345257-4-mike.kravetz@oracle.com Signed-off-by: Mike Kravetz <mike.kravetz@oracle.com> Reviewed-by: Muchun Song <songmuchun@bytedance.com> Cc: Anshuman Khandual <anshuman.khandual@arm.com> Cc: Barry Song <21cnbao@gmail.com> Cc: David Hildenbrand <david@redhat.com> Cc: David Rientjes <rientjes@google.com> Cc: James Houghton <jthoughton@google.com> Cc: Joao Martins <joao.m.martins@oracle.com> Cc: Konrad Dybcio <konradybcio@kernel.org> Cc: Matthew Wilcox (Oracle) <willy@infradead.org> Cc: Miaohe Lin <linmiaohe@huawei.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Naoya Horiguchi <naoya.horiguchi@linux.dev> Cc: Oscar Salvador <osalvador@suse.de> Cc: Sergey Senozhatsky <senozhatsky@chromium.org> Cc: Usama Arif <usama.arif@bytedance.com> Cc: Xiongchun Duan <duanxiongchun@bytedance.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/hugetlb.c')
-rw-r--r--mm/hugetlb.c43
1 files changed, 35 insertions, 8 deletions
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 559f7c71c596..8b171f866d0a 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -2282,6 +2282,9 @@ static void prep_and_add_allocated_folios(struct hstate *h,
unsigned long flags;
struct folio *folio, *tmp_f;
+ /* Send list for bulk vmemmap optimization processing */
+ hugetlb_vmemmap_optimize_folios(h, folio_list);
+
/* Add all new pool pages to free lists in one lock cycle */
spin_lock_irqsave(&hugetlb_lock, flags);
list_for_each_entry_safe(folio, tmp_f, folio_list, lru) {
@@ -3344,6 +3347,35 @@ static void __init hugetlb_folio_init_vmemmap(struct folio *folio,
prep_compound_head((struct page *)folio, huge_page_order(h));
}
+static void __init prep_and_add_bootmem_folios(struct hstate *h,
+ struct list_head *folio_list)
+{
+ unsigned long flags;
+ struct folio *folio, *tmp_f;
+
+ /* Send list for bulk vmemmap optimization processing */
+ hugetlb_vmemmap_optimize_folios(h, folio_list);
+
+ /* Add all new pool pages to free lists in one lock cycle */
+ spin_lock_irqsave(&hugetlb_lock, flags);
+ list_for_each_entry_safe(folio, tmp_f, folio_list, lru) {
+ if (!folio_test_hugetlb_vmemmap_optimized(folio)) {
+ /*
+ * If HVO fails, initialize all tail struct pages
+ * We do not worry about potential long lock hold
+ * time as this is early in boot and there should
+ * be no contention.
+ */
+ hugetlb_folio_init_tail_vmemmap(folio,
+ HUGETLB_VMEMMAP_RESERVE_PAGES,
+ pages_per_huge_page(h));
+ }
+ __prep_account_new_huge_page(h, folio_nid(folio));
+ enqueue_hugetlb_folio(h, folio);
+ }
+ spin_unlock_irqrestore(&hugetlb_lock, flags);
+}
+
/*
* Put bootmem huge pages into the standard lists after mem_map is up.
* Note: This only applies to gigantic (order > MAX_ORDER) pages.
@@ -3364,7 +3396,7 @@ static void __init gather_bootmem_prealloc(void)
* in this list. If so, process each size separately.
*/
if (h != prev_h && prev_h != NULL)
- prep_and_add_allocated_folios(prev_h, &folio_list);
+ prep_and_add_bootmem_folios(prev_h, &folio_list);
prev_h = h;
VM_BUG_ON(!hstate_is_gigantic(h));
@@ -3372,12 +3404,7 @@ static void __init gather_bootmem_prealloc(void)
hugetlb_folio_init_vmemmap(folio, h,
HUGETLB_VMEMMAP_RESERVE_PAGES);
- __prep_new_hugetlb_folio(h, folio);
- /* If HVO fails, initialize all tail struct pages */
- if (!HPageVmemmapOptimized(&folio->page))
- hugetlb_folio_init_tail_vmemmap(folio,
- HUGETLB_VMEMMAP_RESERVE_PAGES,
- pages_per_huge_page(h));
+ init_new_hugetlb_folio(h, folio);
list_add(&folio->lru, &folio_list);
/*
@@ -3389,7 +3416,7 @@ static void __init gather_bootmem_prealloc(void)
cond_resched();
}
- prep_and_add_allocated_folios(h, &folio_list);
+ prep_and_add_bootmem_folios(h, &folio_list);
}
static void __init hugetlb_hstate_alloc_pages_onenode(struct hstate *h, int nid)