Commit a581865e authored by Miaohe Lin's avatar Miaohe Lin Committed by Linus Torvalds
Browse files

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: default avatarMiaohe Lin <linmiaohe@huawei.com>
Cc: Naoya Horiguchi <naoya.horiguchi@nec.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent b04d3eeb

mm/hwpoison-inject.c

+2 −2
Original line number Diff line number Diff line
@@ -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;



	/*

mm/page_alloc.c

+1 −0
Original line number Diff line number Diff line
@@ -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

/*