From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754732AbbCMKaP (ORCPT ); Fri, 13 Mar 2015 06:30:15 -0400 Received: from mga11.intel.com ([192.55.52.93]:46207 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754692AbbCMKaK (ORCPT ); Fri, 13 Mar 2015 06:30:10 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.11,394,1422950400"; d="scan'208";a="466763823" From: "Kirill A. Shutemov" To: Andrew Morton Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-parisc@vger.kernel.org, "Kirill A. Shutemov" , John David Anglin , Aaro Koskinen , Graham Gower , Domenico Andreoli Subject: [PATCH] parisc: fix pmd accounting with 3-level page tables Date: Fri, 13 Mar 2015 12:30:02 +0200 Message-Id: <1426242602-52804-1-git-send-email-kirill.shutemov@linux.intel.com> X-Mailer: git-send-email 2.1.4 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org There's hack in pgd_alloc() on parisc to initialize one pmd, which is not accounted. It leads to underflow on exit. Let's adjust nr_pmds on pgd_alloc() to get accounting correct. Signed-off-by: Kirill A. Shutemov Cc: John David Anglin Cc: Aaro Koskinen Cc: Graham Gower Cc: Domenico Andreoli --- arch/parisc/include/asm/pgalloc.h | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/parisc/include/asm/pgalloc.h b/arch/parisc/include/asm/pgalloc.h index 55ad8be9b7f3..068b2fb9a47c 100644 --- a/arch/parisc/include/asm/pgalloc.h +++ b/arch/parisc/include/asm/pgalloc.h @@ -38,6 +38,7 @@ static inline pgd_t *pgd_alloc(struct mm_struct *mm) /* The first pmd entry also is marked with _PAGE_GATEWAY as * a signal that this pmd may not be freed */ __pgd_val_set(*pgd, PxD_FLAG_ATTACHED); + mm_inc_nr_pmds(mm); #endif } return actual_pgd; -- 2.1.4