From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-oi0-f47.google.com (mail-oi0-f47.google.com [209.85.218.47]) by kanga.kvack.org (Postfix) with ESMTP id A18806B0253 for ; Mon, 10 Aug 2015 02:49:57 -0400 (EDT) Received: by oiev193 with SMTP id v193so52487687oie.3 for ; Sun, 09 Aug 2015 23:49:57 -0700 (PDT) Received: from BLU004-OMC1S5.hotmail.com (blu004-omc1s5.hotmail.com. [65.55.116.16]) by mx.google.com with ESMTPS id cx4si13654040oeb.100.2015.08.09.23.49.56 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Sun, 09 Aug 2015 23:49:56 -0700 (PDT) Message-ID: From: Wanpeng Li Subject: [PATCH 1/2] mm/hwpoison: fix fail to split THP w/ refcount held Date: Mon, 10 Aug 2015 14:32:30 +0800 MIME-Version: 1.0 Content-Type: text/plain Sender: owner-linux-mm@kvack.org List-ID: To: Andrew Morton Cc: Naoya Horiguchi , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Wanpeng Li THP pages will get a refcount in madvise_hwpoison() w/ MF_COUNT_INCREASED flag, however, the refcount is still held when fail to split THP pages. Fix it by reducing the refcount of THP pages when fail to split THP. Signed-off-by: Wanpeng Li --- mm/memory-failure.c | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-) diff --git a/mm/memory-failure.c b/mm/memory-failure.c index 8077b1c..56b8a71 100644 --- a/mm/memory-failure.c +++ b/mm/memory-failure.c @@ -1710,6 +1710,8 @@ int soft_offline_page(struct page *page, int flags) if (PageAnon(hpage) && unlikely(split_huge_page(hpage))) { pr_info("soft offline: %#lx: failed to split THP\n", pfn); + if (flags & MF_COUNT_INCREASED) + put_page(page); return -EBUSY; } } -- 1.7.1 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org