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mm: make alloc_contig_range handle in-use hugetlb pages

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alloc_contig_range() will fail if it finds a HugeTLB page within the
range, without a chance to handle them.  Since HugeTLB pages can be
migrated as any LRU or Movable page, it does not make sense to bail out
without trying.  Enable the interface to recognize in-use HugeTLB pages so
we can migrate them, and have much better chances to succeed the call.

Link: https://lkml.kernel.org/r/20210419075413.1064-7-osalvador@suse.de
Signed-off-by: Oscar Salvador <osalvador@suse.de>
Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Acked-by: David Hildenbrand <david@redhat.com>
Cc: Muchun Song <songmuchun@bytedance.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Oscar Salvador 2021-05-04 18:35:29 -07:00 • committed by Linus Torvalds
parent 369fa227c2
commit ae37c7ff79
4 changed files with 34 additions and 10 deletions
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5
include/linux/hugetlb.h
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@ -588,7 +588,7 @@ struct huge_bootmem_page {
struct hstate *hstate;
};
int isolate_or_dissolve_huge_page(struct page *page);
int isolate_or_dissolve_huge_page(struct page *page, struct list_head *list);
struct page *alloc_huge_page(struct vm_area_struct *vma,
unsigned long addr, int avoid_reserve);
struct page *alloc_huge_page_nodemask(struct hstate *h, int preferred_nid,
@ -871,7 +871,8 @@ static inline void huge_ptep_modify_prot_commit(struct vm_area_struct *vma,
#else /* CONFIG_HUGETLB_PAGE */
struct hstate {};
static inline int isolate_or_dissolve_huge_page(struct page *page)
static inline int isolate_or_dissolve_huge_page(struct page *page,
struct list_head *list)
{
return -ENOMEM;
}