linux-kernel - [PATCH v4 2/7] mm,hwpoison: Do not set hugepage_or

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Date:   Thu, 17 Sep 2020 10:10:44 +0200
From:   Oscar Salvador <osalvador@...e.de>
To:     akpm@...ux-foundation.org
Cc:     aris@...vo.org, naoya.horiguchi@....com, mhocko@...nel.org,
        tony.luck@...el.com, cai@....pw, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, Oscar Salvador <osalvador@...e.de>
Subject: [PATCH v4 2/7] mm,hwpoison: Do not set hugepage_or_freepage unconditionally

Aristeu Rozanski reported that some hwpoison tests
were returning -EBUSY while before the rework they succeed [1] [2].

The root case is that during a rebase, the call to page_handle_poison was
setting hugepage_or_freepage = true unconditionally from __soft_offline_page.

Aristeu said that after this fix, everything works.

[1] https://patchwork.kernel.org/comment/23617301/
[2] https://patchwork.kernel.org/comment/23619535/

Signed-off-by: Oscar Salvador <osalvador@...e.de>
Reported-by: Aristeu Rozanski <aris@...vo.org>
---
 mm/memory-failure.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index 74a53881f94b..db61bdee9734 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -1852,7 +1852,7 @@ static int __soft_offline_page(struct page *page)
 		if (!ret) {
 			bool release = !huge;
 
-			if (!page_handle_poison(page, true, release))
+			if (!page_handle_poison(page, huge, release))
 				ret = -EBUSY;
 		} else {
 			if (!list_empty(&pagelist))
-- 
2.26.2