The patch titled
Subject: mm: soft-offline: return -EBUSY if set_hwpoison_free_buddy_page() fails
has been added to the -mm tree. Its filename is
mm-soft-offline-return-ebusy-if-set_hwpoison_free_buddy_page-fails.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-soft-offline-return-ebusy-if-set_hwpoison_free_buddy_page-fails.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-soft-offline-return-ebusy-if-set_hwpoison_free_buddy_page-fails.patch
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------------------------------------------------------
From: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx>
Subject: mm: soft-offline: return -EBUSY if set_hwpoison_free_buddy_page() fails
The pass/fail of soft offline should be judged by checking whether the raw
error page was finally contained or not (i.e. the result of
set_hwpoison_free_buddy_page()), but current code do not work like that.
So this patch is suggesting to fix it.
Link: http://lkml.kernel.org/r/1560154686-18497-2-git-send-email-n-horiguchi@xxxxxxxxxxxxx
Signed-off-by: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx>
Fixes: 6bc9b56433b76 ("mm: fix race on soft-offlining")
Cc: Michal Hocko <mhocko@xxxxxxxxxx>
Cc: Mike Kravetz <mike.kravetz@xxxxxxxxxx>
Cc: Xishi Qiu <xishi.qiuxishi@xxxxxxxxxxxxxxx>
Cc: "Chen, Jerry T" <jerry.t.chen@xxxxxxxxx>
Cc: "Zhuo, Qiuxu" <qiuxu.zhuo@xxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx> [4.19+]
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/memory-failure.c | 2 ++
1 file changed, 2 insertions(+)
--- a/mm/memory-failure.c~mm-soft-offline-return-ebusy-if-set_hwpoison_free_buddy_page-fails
+++ a/mm/memory-failure.c
@@ -1730,6 +1730,8 @@ static int soft_offline_huge_page(struct
if (!ret) {
if (set_hwpoison_free_buddy_page(page))
num_poisoned_pages_inc();
+ else
+ ret = -EBUSY;
}
}
return ret;
_
Patches currently in -mm which might be from n-horiguchi@xxxxxxxxxxxxx are
mm-soft-offline-return-ebusy-if-set_hwpoison_free_buddy_page-fails.patch
mm-hugetlb-soft-offline-dissolve_free_huge_page-return-zero-on-pagehuge.patch
