From mboxrd@z Thu Jan 1 00:00:00 1970 Message-Id: <20070420155503.334628394@chello.nl> References: <20070420155154.898600123@chello.nl> Date: Fri, 20 Apr 2007 17:52:02 +0200 From: Peter Zijlstra Subject: [PATCH 08/10] mm: count writeback pages per BDI Content-Disposition: inline; filename=bdi_stat_writeback.patch Sender: owner-linux-mm@kvack.org Return-Path: To: linux-mm@kvack.org, linux-kernel@vger.kernel.org Cc: miklos@szeredi.hu, akpm@linux-foundation.org, neilb@suse.de, dgc@sgi.com, tomoki.sekiyama.qu@hitachi.com, a.p.zijlstra@chello.nl, nikita@clusterfs.com, trond.myklebust@fys.uio.no, yingchao.zhou@gmail.com List-ID: Count per BDI writeback pages. Signed-off-by: Peter Zijlstra --- include/linux/backing-dev.h | 1 + mm/page-writeback.c | 12 ++++++++++-- 2 files changed, 11 insertions(+), 2 deletions(-) Index: linux-2.6/mm/page-writeback.c =================================================================== --- linux-2.6.orig/mm/page-writeback.c 2007-04-20 15:27:28.000000000 +0200 +++ linux-2.6/mm/page-writeback.c 2007-04-20 15:28:10.000000000 +0200 @@ -979,14 +979,18 @@ int test_clear_page_writeback(struct pag int ret; if (mapping) { + struct backing_dev_info *bdi = mapping->backing_dev_info; unsigned long flags; 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); + if (bdi_cap_writeback_dirty(bdi)) + __dec_bdi_stat(bdi, BDI_WRITEBACK); + } write_unlock_irqrestore(&mapping->tree_lock, flags); } else { ret = TestClearPageWriteback(page); @@ -1002,14 +1006,18 @@ int test_set_page_writeback(struct page int ret; if (mapping) { + struct backing_dev_info *bdi = mapping->backing_dev_info; unsigned long flags; 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); + if (bdi_cap_writeback_dirty(bdi)) + __inc_bdi_stat(bdi, 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 2007-04-20 15:25:47.000000000 +0200 +++ linux-2.6/include/linux/backing-dev.h 2007-04-20 15:28:17.000000000 +0200 @@ -27,6 +27,7 @@ typedef int (congested_fn)(void *, int); enum bdi_stat_item { BDI_RECLAIMABLE, + BDI_WRITEBACK, NR_BDI_STAT_ITEMS }; -- -- 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