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hwpoison: always unset MIGRATE_ISOLATE before returning from soft_offline_page() 

Soft offline code expects that MIGRATE_ISOLATE is set on the target page
only during soft offlining work.  But currenly it doesn't work as expected
when get_any_page() fails and returns negative value.  In the result, end
users can have unexpectedly isolated pages.  This patch just fixes it.

Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Reviewed-by: Wanpeng Li <liwanp@linux.vnet.ibm.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Fengguang Wu <fengguang.wu@intel.com>
Cc: Tony Luck <tony.luck@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Naoya Horiguchi 2013-09-11 14:22:49 -07:00 committed by Linus Torvalds
parent cf6fe94538
commit 0d6fdbdb2a
1 changed files with 2 additions and 1 deletions
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3
mm/memory-failure.c
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@ -1553,7 +1553,7 @@ int soft_offline_page(struct page *page, int flags)
ret = get_any_page(page, pfn, flags);
if (ret < 0)
return ret;
goto unset;
if (ret) { /* for in-use pages */
if (PageHuge(page))
ret = soft_offline_huge_page(page, flags);
@ -1570,6 +1570,7 @@ int soft_offline_page(struct page *page, int flags)
atomic_long_inc(&num_poisoned_pages);
}
}
unset:
unset_migratetype_isolate(page, MIGRATE_MOVABLE);
return ret;
}