Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753387Ab0H1ClS (ORCPT ); Fri, 27 Aug 2010 22:41:18 -0400 Received: from smtp-out.google.com ([216.239.44.51]:10260 "EHLO smtp-out.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753201Ab0H1ClM (ORCPT ); Fri, 27 Aug 2010 22:41:12 -0400 DomainKey-Signature: a=rsa-sha1; s=beta; d=google.com; c=nofws; q=dns; h=from:to:cc:subject:date:message-id:x-mailer:in-reply-to:references; b=dlk/kLDnmi7jhGf++O5TXvdyA5+OX9RCo3NpFW82wITw2Vroi44l+40+gIuIzXbGp IV/lmaXXGAny9g5mDvG3A== From: Michael Rubin To: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org 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 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> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1282963227-31867-1-git-send-email-mrubin@google.com> References: <1282963227-31867-1-git-send-email-mrubin@google.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1833 Lines: 54 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 from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/