From: Naoya Horiguchi Date: Wed, 30 Jul 2014 23:08:28 +0000 (-0700) Subject: hwpoison: fix hugetlbfs/thp precheck in hwpoison_user_mappings() X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=93a9eb39fad1b5fc9077776caa3af207883b254d;p=openwrt%2Fstaging%2Fblogic.git hwpoison: fix hugetlbfs/thp precheck in hwpoison_user_mappings() A recent fix from Chen Yucong, commit 0bc1f8b0682c ("hwpoison: fix the handling path of the victimized page frame that belong to non-LRU") rejects going into unmapping operation for hugetlbfs/thp pages, which results in failing error containing on such pages. This patch fixes it. With this patch, hwpoison functional tests in mce-test testsuite pass. Signed-off-by: Naoya Horiguchi Cc: Andi Kleen Cc: Chen Yucong Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/mm/memory-failure.c b/mm/memory-failure.c index 7211a73ba14d..3db261fdee4c 100644 --- a/mm/memory-failure.c +++ b/mm/memory-failure.c @@ -895,7 +895,13 @@ static int hwpoison_user_mappings(struct page *p, unsigned long pfn, struct page *hpage = *hpagep; struct page *ppage; - if (PageReserved(p) || PageSlab(p) || !PageLRU(p)) + /* + * Here we are interested only in user-mapped pages, so skip any + * other types of pages. + */ + if (PageReserved(p) || PageSlab(p)) + return SWAP_SUCCESS; + if (!(PageLRU(hpage) || PageHuge(p))) return SWAP_SUCCESS; /*