The patch titled
Subject: mm: soft-offline: return -EBUSY if set_hwpoison_free_buddy_page() fails
has been removed from the -mm tree. Its filename was
mm-soft-offline-return-ebusy-if-set_hwpoison_free_buddy_page-fails.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
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. It might lead us to misjudge the test result when
set_hwpoison_free_buddy_page() fails.
Without this fix, there are cases where madvise(MADV_SOFT_OFFLINE) may
not offline the original page and will not return an error.
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")
Reviewed-by: Mike Kravetz <mike.kravetz@xxxxxxxxxx>
Reviewed-by: Oscar Salvador <osalvador@xxxxxxx>
Cc: Michal Hocko <mhocko@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
