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mm/hwpoison-inject: support injecting hwpoison to free page

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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 <linmiaohe@huawei.com>
Cc: Naoya Horiguchi <naoya.horiguchi@nec.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Miaohe Lin 2022-03-22 14:44:35 -07:00 committed by Linus Torvalds
parent b04d3eebeb
commit a581865ecd
2 changed files with 3 additions and 2 deletions
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4
mm/hwpoison-inject.c
View file

@ -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;
/*

1
mm/page_alloc.c
View file

@ -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
/*