From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ob0-f179.google.com (mail-ob0-f179.google.com [209.85.214.179]) by kanga.kvack.org (Postfix) with ESMTP id 315896B0253 for ; Mon, 10 Aug 2015 07:56:09 -0400 (EDT) Received: by obbhe7 with SMTP id he7so25438467obb.0 for ; Mon, 10 Aug 2015 04:56:09 -0700 (PDT) Received: from BLU004-OMC1S20.hotmail.com (blu004-omc1s20.hotmail.com. [65.55.116.31]) by mx.google.com with ESMTPS id tu10si2313531obb.45.2015.08.10.04.56.08 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 10 Aug 2015 04:56:08 -0700 (PDT) Message-ID: From: Wanpeng Li Subject: [PATCH v2 1/5] mm/hwpoison: fix fail to split thp w/ refcount held Date: Mon, 10 Aug 2015 19:28:19 +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