From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932497AbcBAN1Y (ORCPT ); Mon, 1 Feb 2016 08:27:24 -0500 Received: from mga04.intel.com ([192.55.52.120]:25700 "EHLO mga04.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932189AbcBAN1X (ORCPT ); Mon, 1 Feb 2016 08:27:23 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.22,380,1449561600"; d="scan'208";a="905839541" From: "Kirill A. Shutemov" To: Andrew Morton , Dmitry Vyukov Cc: Vlastimil Babka , David Rientjes , Naoya Horiguchi , Michal Hocko , linux-mm@kvack.org, linux-kernel@vger.kernel.org, "Kirill A. Shutemov" Subject: [PATCH 0/2] Fix another VM_BUG_ON_PAGE(PageTail(page)) on mbind(2) Date: Mon, 1 Feb 2016 16:26:07 +0300 Message-Id: <1454333169-121369-1-git-send-email-kirill.shutemov@linux.intel.com> X-Mailer: git-send-email 2.7.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Dmitry Vyukov reported yet another VM_BUG_ON_PAGE(PageTail(page)) bug from isolate_lru_page(). The first patch relaxes VM_BUG_ON_PAGE(): no need to crash on tail pages which are not on LRU. We are not going to isolate them anyway. The second patch tries streamline logic within queue_pages_range(): no need to scan non migratable VMAs. The patch requires more careful review. Any of these patches should fix the issue. I think both should be applied. The first one is subject for 4.5 as the bogus was introduced there. Kirill A. Shutemov (2): mm: fix bogus VM_BUG_ON_PAGE() in isolate_lru_page() mempolicy: do not try to queue pages from !vma_migratable() mm/mempolicy.c | 14 +++++--------- mm/vmscan.c | 2 +- 2 files changed, 6 insertions(+), 10 deletions(-) -- 2.7.0