From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030412AbXCSRwt (ORCPT ); Mon, 19 Mar 2007 13:52:49 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1030410AbXCSRwt (ORCPT ); Mon, 19 Mar 2007 13:52:49 -0400 Received: from amsfep17-int.chello.nl ([213.46.243.15]:12542 "EHLO amsfep14-int.chello.nl" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1030417AbXCSRws (ORCPT ); Mon, 19 Mar 2007 13:52:48 -0400 Message-Id: <20070319164320.127815453@programming.kicks-ass.net> References: <20070319155737.653325176@programming.kicks-ass.net> User-Agent: quilt/0.45-1 Date: Mon, 19 Mar 2007 16:57:40 +0100 From: Peter Zijlstra To: linux-mm@kvack.org, linux-kernel@vger.kernel.org Cc: akpm@linux-foundation.org, neilb@suse.de, dgc@sgi.com, tomoki.sekiyama.qu@hitachi.com, a.p.zijlstra@chello.nl Subject: [RFC][PATCH 3/6] mm: count writeback pages per BDI Content-Disposition: inline; filename=bdi_stat_writeback.patch Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Count per BDI writeback pages. Signed-off-by: Peter Zijlstra --- include/linux/backing-dev.h | 1 + mm/page-writeback.c | 8 ++++++-- 2 files changed, 7 insertions(+), 2 deletions(-) Index: linux-2.6/mm/page-writeback.c =================================================================== --- linux-2.6.orig/mm/page-writeback.c +++ linux-2.6/mm/page-writeback.c @@ -912,10 +912,12 @@ int test_clear_page_writeback(struct pag write_lock_irqsave(&mapping->tree_lock, flags); ret = TestClearPageWriteback(page); - if (ret) + if (ret) { radix_tree_tag_clear(&mapping->page_tree, page_index(page), PAGECACHE_TAG_WRITEBACK); + __dec_bdi_stat(mapping->backing_dev_info, BDI_WRITEBACK); + } write_unlock_irqrestore(&mapping->tree_lock, flags); } else { ret = TestClearPageWriteback(page); @@ -933,10 +935,12 @@ int test_set_page_writeback(struct page write_lock_irqsave(&mapping->tree_lock, flags); ret = TestSetPageWriteback(page); - if (!ret) + if (!ret) { radix_tree_tag_set(&mapping->page_tree, page_index(page), PAGECACHE_TAG_WRITEBACK); + __inc_bdi_stat(mapping->backing_dev_info, BDI_WRITEBACK); + } if (!PageDirty(page)) radix_tree_tag_clear(&mapping->page_tree, page_index(page), Index: linux-2.6/include/linux/backing-dev.h =================================================================== --- linux-2.6.orig/include/linux/backing-dev.h +++ linux-2.6/include/linux/backing-dev.h @@ -24,6 +24,7 @@ enum bdi_state { enum bdi_stat_item { BDI_DIRTY, + BDI_WRITEBACK, NR_BDI_STAT_ITEMS }; --