diff options
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/memory-failure.c | 40 |
1 files changed, 38 insertions, 2 deletions
diff --git a/mm/memory-failure.c b/mm/memory-failure.c index 9422a5770db6..adb0dacbc74e 100644 --- a/mm/memory-failure.c +++ b/mm/memory-failure.c @@ -72,6 +72,8 @@ atomic_long_t num_poisoned_pages __read_mostly = ATOMIC_LONG_INIT(0); static bool hw_memory_failure __read_mostly = false; +static DEFINE_MUTEX(mf_mutex); + void num_poisoned_pages_inc(unsigned long pfn) { atomic_long_inc(&num_poisoned_pages); @@ -1814,6 +1816,7 @@ EXPORT_SYMBOL_GPL(mf_dax_kill_procs); #endif /* CONFIG_FS_DAX */ #ifdef CONFIG_HUGETLB_PAGE + /* * Struct raw_hwp_page represents information about "raw error page", * constructing singly linked list from ->_hugetlb_hwpoison field of folio. @@ -1828,6 +1831,41 @@ static inline struct llist_head *raw_hwp_list_head(struct folio *folio) return (struct llist_head *)&folio->_hugetlb_hwpoison; } +bool is_raw_hwpoison_page_in_hugepage(struct page *page) +{ + struct llist_head *raw_hwp_head; + struct raw_hwp_page *p; + struct folio *folio = page_folio(page); + bool ret = false; + + if (!folio_test_hwpoison(folio)) + return false; + + if (!folio_test_hugetlb(folio)) + return PageHWPoison(page); + + /* + * When RawHwpUnreliable is set, kernel lost track of which subpages + * are HWPOISON. So return as if ALL subpages are HWPOISONed. + */ + if (folio_test_hugetlb_raw_hwp_unreliable(folio)) + return true; + + mutex_lock(&mf_mutex); + + raw_hwp_head = raw_hwp_list_head(folio); + llist_for_each_entry(p, raw_hwp_head->first, node) { + if (page == p->page) { + ret = true; + break; + } + } + + mutex_unlock(&mf_mutex); + + return ret; +} + static unsigned long __folio_free_raw_hwp(struct folio *folio, bool move_flag) { struct llist_node *t, *tnode, *head; @@ -2110,8 +2148,6 @@ out: return rc; } -static DEFINE_MUTEX(mf_mutex); - /** * memory_failure - Handle memory failure of a page. * @pfn: Page Number of the corrupted page |