From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 88BEBC282CE for ; Mon, 11 Feb 2019 14:28:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5698620838 for ; Mon, 11 Feb 2019 14:28:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1549895330; bh=MOYvTlkN5XYRkqPMyjzQEJ10dI/USLtgUhUO3pRGLb0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=x/Zg/DikuD9wKxBHaiQX+G6IY5N1+cDOcfD3lJC909bvRBQRqY6QWMEkJrXQ9dw4f H+DqebPqUGUwdmLtOOoikeNjlvxonZicsGr9GH9xLH0RBkFjPEZYmJCUYAcWpQG6I2 5W8gqD0WVyXlXYYOiPqPqIjNiiywas6QQGzkZ8Vs= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729912AbfBKO2r (ORCPT ); Mon, 11 Feb 2019 09:28:47 -0500 Received: from mail.kernel.org ([198.145.29.99]:34700 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729153AbfBKO2p (ORCPT ); Mon, 11 Feb 2019 09:28:45 -0500 Received: from localhost (5356596B.cm-6-7b.dynamic.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 5772920821; Mon, 11 Feb 2019 14:28:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1549895323; bh=MOYvTlkN5XYRkqPMyjzQEJ10dI/USLtgUhUO3pRGLb0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=hqpLrwSR7bmylQJmb9rZ8K4d6cbxJ7QK7W55UEgfONJrguEGxLiF2s5bKU+0zEa4m ZEtWavrFP+GTrh/hbpd6pGWs+yIG/t81kf0EjKtSvce0PXc3snoVGu+ZjiAi5COf8Z OiNbpe71h+50gxy0hCxmIRTLPqoqj7aH3fieN464= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Chao Yu , Jaegeuk Kim , Sasha Levin Subject: [PATCH 4.20 167/352] f2fs: fix to reorder set_page_dirty and wait_on_page_writeback Date: Mon, 11 Feb 2019 15:16:34 +0100 Message-Id: <20190211141857.629447978@linuxfoundation.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190211141846.543045703@linuxfoundation.org> References: <20190211141846.543045703@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review X-Patchwork-Hint: ignore MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.20-stable review patch. If anyone has any objections, please let me know. ------------------ [ Upstream commit 8d64d365aed355b2e2465d19ba61df02462fff4d ] This patch reorders flow from - update page - set_page_dirty - wait_on_page_writeback to - wait_on_page_writeback - update page - set_page_dirty The reason is: - set_page_dirty will increase reference of dirty page, the reference should be cleared before wait_on_page_writeback to keep its consistency. - some devices need stable page during page writebacking, so we should not change page's data. Signed-off-by: Chao Yu Signed-off-by: Jaegeuk Kim Signed-off-by: Sasha Levin --- fs/f2fs/checkpoint.c | 7 ++++--- fs/f2fs/gc.c | 5 +++-- fs/f2fs/node.c | 5 +++-- fs/f2fs/segment.c | 3 ++- 4 files changed, 12 insertions(+), 8 deletions(-) diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c index 9c28ea439e0b..e5719fcac47d 100644 --- a/fs/f2fs/checkpoint.c +++ b/fs/f2fs/checkpoint.c @@ -1290,11 +1290,12 @@ static void commit_checkpoint(struct f2fs_sb_info *sbi, struct page *page = f2fs_grab_meta_page(sbi, blk_addr); int err; - memcpy(page_address(page), src, PAGE_SIZE); - set_page_dirty(page); - f2fs_wait_on_page_writeback(page, META, true); f2fs_bug_on(sbi, PageWriteback(page)); + + memcpy(page_address(page), src, PAGE_SIZE); + + set_page_dirty(page); if (unlikely(!clear_page_dirty_for_io(page))) f2fs_bug_on(sbi, 1); diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c index c96e7c6354ef..74f72dccab57 100644 --- a/fs/f2fs/gc.c +++ b/fs/f2fs/gc.c @@ -812,8 +812,8 @@ static int move_data_block(struct inode *inode, block_t bidx, } write_page: - set_page_dirty(fio.encrypted_page); f2fs_wait_on_page_writeback(fio.encrypted_page, DATA, true); + set_page_dirty(fio.encrypted_page); if (clear_page_dirty_for_io(fio.encrypted_page)) dec_page_count(fio.sbi, F2FS_DIRTY_META); @@ -907,8 +907,9 @@ static int move_data_page(struct inode *inode, block_t bidx, int gc_type, bool is_dirty = PageDirty(page); retry: - set_page_dirty(page); f2fs_wait_on_page_writeback(page, DATA, true); + + set_page_dirty(page); if (clear_page_dirty_for_io(page)) { inode_dec_dirty_pages(inode); f2fs_remove_dirty_inode(inode); diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c index 88be946dedd4..33fb3f8aeafa 100644 --- a/fs/f2fs/node.c +++ b/fs/f2fs/node.c @@ -1598,10 +1598,11 @@ int f2fs_move_node_page(struct page *node_page, int gc_type) .for_reclaim = 0, }; - set_page_dirty(node_page); f2fs_wait_on_page_writeback(node_page, NODE, true); - f2fs_bug_on(F2FS_P_SB(node_page), PageWriteback(node_page)); + + set_page_dirty(node_page); + if (!clear_page_dirty_for_io(node_page)) { err = -EAGAIN; goto out_page; diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c index 6edcf8391dd3..8f3578c5230e 100644 --- a/fs/f2fs/segment.c +++ b/fs/f2fs/segment.c @@ -387,8 +387,9 @@ static int __f2fs_commit_inmem_pages(struct inode *inode) if (page->mapping == inode->i_mapping) { trace_f2fs_commit_inmem_page(page, INMEM); - set_page_dirty(page); f2fs_wait_on_page_writeback(page, DATA, true); + + set_page_dirty(page); if (clear_page_dirty_for_io(page)) { inode_dec_dirty_pages(inode); f2fs_remove_dirty_inode(inode); -- 2.19.1