From mboxrd@z Thu Jan 1 00:00:00 1970 From: Michael Rubin Subject: [PATCH 1/4] mm: exporting account_page_dirty Date: Fri, 27 Aug 2010 19:40:24 -0700 Message-ID: <1282963227-31867-2-git-send-email-mrubin@google.com> References: <1282963227-31867-1-git-send-email-mrubin@google.com> Cc: fengguang.wu@intel.com, jack@suse.cz, riel@redhat.com, akpm@linux-foundation.org, david@fromorbit.com, kosaki.motohiro@jp.fujitsu.com, npiggin@kernel.dk, hch@lst.de, axboe@kernel.dk, Michael Rubin To: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org Return-path: In-Reply-To: <1282963227-31867-1-git-send-email-mrubin@google.com> Sender: owner-linux-mm@kvack.org List-Id: linux-fsdevel.vger.kernel.org This allows code outside of the mm core to safely manipulate page state and not worry about the other accounting. Not using these routines means that some code will lose track of the accounting and we get bugs. This has happened once already. Modified cephs to use the interface. Signed-off-by: Michael Rubin Reviewed-by: Wu Fengguang --- fs/ceph/addr.c | 8 +------- mm/page-writeback.c | 1 + 2 files changed, 2 insertions(+), 7 deletions(-) diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c index 5598a0d..420d469 100644 --- a/fs/ceph/addr.c +++ b/fs/ceph/addr.c @@ -105,13 +105,7 @@ static int ceph_set_page_dirty(struct page *page) spin_lock_irq(&mapping->tree_lock); if (page->mapping) { /* Race with truncate? */ WARN_ON_ONCE(!PageUptodate(page)); - - if (mapping_cap_account_dirty(mapping)) { - __inc_zone_page_state(page, NR_FILE_DIRTY); - __inc_bdi_stat(mapping->backing_dev_info, - BDI_RECLAIMABLE); - task_io_account_write(PAGE_CACHE_SIZE); - } + account_page_dirtied(page, page->mapping); radix_tree_tag_set(&mapping->page_tree, page_index(page), PAGECACHE_TAG_DIRTY); diff --git a/mm/page-writeback.c b/mm/page-writeback.c index 7262aac..9d07a8d 100644 --- a/mm/page-writeback.c +++ b/mm/page-writeback.c @@ -1131,6 +1131,7 @@ void account_page_dirtied(struct page *page, struct address_space *mapping) task_io_account_write(PAGE_CACHE_SIZE); } } +EXPORT_SYMBOL(account_page_dirtied); /* * For address_spaces which do not use buffers. Just tag the page as dirty in -- 1.7.1 -- 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