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mm/hugetlb: convert get_hwpoison_huge_page() to folios

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Straightforward conversion of get_hwpoison_huge_page() to
get_hwpoison_hugetlb_folio().  Reduces two references to a head page in
memory-failure.c

[arnd@arndb.de: fix get_hwpoison_hugetlb_folio() stub]
  Link: https://lkml.kernel.org/r/20230119111920.635260-1-arnd@kernel.org
Link: https://lkml.kernel.org/r/20230118174039.14247-1-sidhartha.kumar@oracle.com
Signed-off-by: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Naoya Horiguchi <naoya.horiguchi@nec.com>
Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Muchun Song <songmuchun@bytedance.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Sidhartha Kumar 2023-01-18 09:40:39 -08:00 committed by Andrew Morton
parent b46402fa89
commit 04bac040bc
3 changed files with 18 additions and 18 deletions
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4
include/linux/hugetlb.h
View File

@ -172,7 +172,7 @@ bool hugetlb_reserve_pages(struct inode *inode, long from, long to,
long hugetlb_unreserve_pages(struct inode *inode, long start, long end,
long freed);
int isolate_hugetlb(struct page *page, struct list_head *list);
int get_hwpoison_huge_page(struct page *page, bool *hugetlb, bool unpoison);
int get_hwpoison_hugetlb_folio(struct folio *folio, bool *hugetlb, bool unpoison);
int get_huge_page_for_hwpoison(unsigned long pfn, int flags,
bool *migratable_cleared);
void putback_active_hugepage(struct page *page);
@ -418,7 +418,7 @@ static inline int isolate_hugetlb(struct page *page, struct list_head *list)
return -EBUSY;
}
static inline int get_hwpoison_huge_page(struct page *page, bool *hugetlb, bool unpoison)
static inline int get_hwpoison_hugetlb_folio(struct folio *folio, bool *hugetlb, bool unpoison)
{
return 0;
}

10
mm/hugetlb.c
View File

@ -7268,18 +7268,18 @@ unlock:
return ret;
}
int get_hwpoison_huge_page(struct page *page, bool *hugetlb, bool unpoison)
int get_hwpoison_hugetlb_folio(struct folio *folio, bool *hugetlb, bool unpoison)
{
int ret = 0;
*hugetlb = false;
spin_lock_irq(&hugetlb_lock);
if (PageHeadHuge(page)) {
if (folio_test_hugetlb(folio)) {
*hugetlb = true;
if (HPageFreed(page))
if (folio_test_hugetlb_freed(folio))
ret = 0;
else if (HPageMigratable(page) || unpoison)
ret = get_page_unless_zero(page);
else if (folio_test_hugetlb_migratable(folio) || unpoison)
ret = folio_try_get(folio);
else
ret = -EBUSY;
}

22
mm/memory-failure.c
View File

@ -1257,28 +1257,28 @@ static inline bool HWPoisonHandlable(struct page *page, unsigned long flags)
static int __get_hwpoison_page(struct page *page, unsigned long flags)
{
struct page *head = compound_head(page);
struct folio *folio = page_folio(page);
int ret = 0;
bool hugetlb = false;
ret = get_hwpoison_huge_page(head, &hugetlb, false);
ret = get_hwpoison_hugetlb_folio(folio, &hugetlb, false);
if (hugetlb)
return ret;
/*
* This check prevents from calling get_page_unless_zero() for any
* unsupported type of page in order to reduce the risk of unexpected
* races caused by taking a page refcount.
* This check prevents from calling folio_try_get() for any
* unsupported type of folio in order to reduce the risk of unexpected
* races caused by taking a folio refcount.
*/
if (!HWPoisonHandlable(head, flags))
if (!HWPoisonHandlable(&folio->page, flags))
return -EBUSY;
if (get_page_unless_zero(head)) {
if (head == compound_head(page))
if (folio_try_get(folio)) {
if (folio == page_folio(page))
return 1;
pr_info("%#lx cannot catch tail\n", page_to_pfn(page));
put_page(head);
folio_put(folio);
}
return 0;
@ -1347,11 +1347,11 @@ out:
static int __get_unpoison_page(struct page *page)
{
struct page *head = compound_head(page);
struct folio *folio = page_folio(page);
int ret = 0;
bool hugetlb = false;
ret = get_hwpoison_huge_page(head, &hugetlb, true);
ret = get_hwpoison_hugetlb_folio(folio, &hugetlb, true);
if (hugetlb)
return ret;