From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755537Ab1DORib (ORCPT ); Fri, 15 Apr 2011 13:38:31 -0400 Received: from e3.ny.us.ibm.com ([32.97.182.143]:54773 "EHLO e3.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755442Ab1DORi3 (ORCPT ); Fri, 15 Apr 2011 13:38:29 -0400 Subject: [RFC][PATCH 2/3] track numbers of pagetable pages To: linux-kernel@vger.kernel.org Cc: linux-mm@kvack.org, Dave Hansen From: Dave Hansen Date: Fri, 15 Apr 2011 10:38:23 -0700 References: <20110415173821.62660715@kernel> In-Reply-To: <20110415173821.62660715@kernel> Message-Id: <20110415173823.EA7A7473@kernel> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Now that we have the mm in the constructor and destructor, it's simple to to bump a counter. Add the counter to the mm and use the existing MM_* counter infrastructure. Signed-off-by: Dave Hansen --- linux-2.6.git-dave/include/linux/mm.h | 2 ++ linux-2.6.git-dave/include/linux/mm_types.h | 1 + 2 files changed, 3 insertions(+) diff -puN include/linux/mm.h~track-pagetable-pages include/linux/mm.h --- linux-2.6.git/include/linux/mm.h~track-pagetable-pages 2011-04-15 10:37:10.768832396 -0700 +++ linux-2.6.git-dave/include/linux/mm.h 2011-04-15 10:37:10.780832393 -0700 @@ -1245,12 +1245,14 @@ static inline pmd_t *pmd_alloc(struct mm static inline void pgtable_page_ctor(struct mm_struct *mm, struct page *page) { pte_lock_init(page); + inc_mm_counter(mm, MM_PTEPAGES); inc_zone_page_state(page, NR_PAGETABLE); } static inline void pgtable_page_dtor(struct mm_struct *mm, struct page *page) { pte_lock_deinit(page); + dec_mm_counter(mm, MM_PTEPAGES); dec_zone_page_state(page, NR_PAGETABLE); } diff -puN include/linux/mm_types.h~track-pagetable-pages include/linux/mm_types.h --- linux-2.6.git/include/linux/mm_types.h~track-pagetable-pages 2011-04-15 10:37:10.772832395 -0700 +++ linux-2.6.git-dave/include/linux/mm_types.h 2011-04-15 10:37:10.780832393 -0700 @@ -200,6 +200,7 @@ enum { MM_FILEPAGES, MM_ANONPAGES, MM_SWAPENTS, + MM_PTEPAGES, NR_MM_COUNTERS }; _