From a581865ecd0a5a0b8464d6f1e668ae6681c1572f Mon Sep 17 00:00:00 2001 From: Miaohe Lin Date: Tue, 22 Mar 2022 14:44:35 -0700 Subject: [PATCH] mm/hwpoison-inject: support injecting hwpoison to free page memory_failure() can handle free buddy page. Support injecting hwpoison to free page by adding is_free_buddy_page check when hwpoison filter is disabled. [akpm@linux-foundation.org: export is_free_buddy_page() to modules] Link: https://lkml.kernel.org/r/20220218092052.3853-1-linmiaohe@huawei.com Signed-off-by: Miaohe Lin Cc: Naoya Horiguchi Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/hwpoison-inject.c | 4 ++-- mm/page_alloc.c | 1 + 2 files changed, 3 insertions(+), 2 deletions(-) diff --git a/mm/hwpoison-inject.c b/mm/hwpoison-inject.c index aff4d27ec235..f74552977649 100644 --- a/mm/hwpoison-inject.c +++ b/mm/hwpoison-inject.c @@ -32,9 +32,9 @@ static int hwpoison_inject(void *data, u64 val) shake_page(hpage); /* - * This implies unable to support non-LRU pages. + * This implies unable to support non-LRU pages except free page. */ - if (!PageLRU(hpage) && !PageHuge(p)) + if (!PageLRU(hpage) && !PageHuge(p) && !is_free_buddy_page(p)) return 0; /* diff --git a/mm/page_alloc.c b/mm/page_alloc.c index e36d7631a64c..a573aa9f5160 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -9417,6 +9417,7 @@ bool is_free_buddy_page(struct page *page) return order < MAX_ORDER; } +EXPORT_SYMBOL(is_free_buddy_page); #ifdef CONFIG_MEMORY_FAILURE /* -- 2.39.5