From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751777AbdFEKaK (ORCPT ); Mon, 5 Jun 2017 06:30:10 -0400 Received: from szxga01-in.huawei.com ([45.249.212.187]:7313 "EHLO szxga01-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751728AbdFEKaJ (ORCPT ); Mon, 5 Jun 2017 06:30:09 -0400 From: Chao Yu To: CC: , , , Chao Yu Subject: [PATCH 3/4] f2fs: don't track newly allocated nat entry in list Date: Mon, 5 Jun 2017 18:29:08 +0800 Message-ID: <20170605102909.57625-3-yuchao0@huawei.com> X-Mailer: git-send-email 2.13.0.67.g10c78a162fa8 In-Reply-To: <20170605102909.57625-1-yuchao0@huawei.com> References: <20170605102909.57625-1-yuchao0@huawei.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.120.216.130] X-CFilter-Loop: Reflected X-Mirapoint-Virus-RAPID-Raw: score=unknown(0), refid=str=0001.0A090204.59353285.0097,ss=1,re=0.000,recu=0.000,reip=0.000,cl=1,cld=1,fgs=0, ip=0.0.0.0, so=2014-11-16 11:51:01, dmn=2013-03-21 17:37:32 X-Mirapoint-Loop-Id: fde77884dd1a639c5a97ab7c7c035ce2 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org We will never persist newly allocated nat entries during checkpoint(), so we don't need to track such nat entries in nat dirty list in order to avoid: - more latency during traversing dirty list; - sorting nat sets incorrectly due to recording wrong entry_cnt in nat entry set. Signed-off-by: Chao Yu --- fs/f2fs/node.c | 16 ++++++++++------ 1 file changed, 10 insertions(+), 6 deletions(-) diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c index d22db8ce0a69..05700e54f91e 100644 --- a/fs/f2fs/node.c +++ b/fs/f2fs/node.c @@ -158,9 +158,6 @@ static void __set_nat_cache_dirty(struct f2fs_nm_info *nm_i, nid_t set = NAT_BLOCK_OFFSET(ne->ni.nid); struct nat_entry_set *head; - if (get_nat_flag(ne, IS_DIRTY)) - return; - head = radix_tree_lookup(&nm_i->nat_set_root, set); if (!head) { head = f2fs_kmem_cache_alloc(nat_entry_set_slab, GFP_NOFS); @@ -171,10 +168,18 @@ static void __set_nat_cache_dirty(struct f2fs_nm_info *nm_i, head->entry_cnt = 0; f2fs_radix_tree_insert(&nm_i->nat_set_root, set, head); } - list_move_tail(&ne->list, &head->entry_list); + + if (get_nat_flag(ne, IS_DIRTY)) + goto refresh_list; + nm_i->dirty_nat_cnt++; head->entry_cnt++; set_nat_flag(ne, IS_DIRTY, true); +refresh_list: + if (nat_get_blkaddr(ne) == NEW_ADDR) + list_del_init(&ne->list); + else + list_move_tail(&ne->list, &head->entry_list); } static void __clear_nat_cache_dirty(struct f2fs_nm_info *nm_i, @@ -2423,8 +2428,7 @@ static void __flush_nat_entry_set(struct f2fs_sb_info *sbi, nid_t nid = nat_get_nid(ne); int offset; - if (nat_get_blkaddr(ne) == NEW_ADDR) - continue; + f2fs_bug_on(sbi, nat_get_blkaddr(ne) == NEW_ADDR); if (to_journal) { offset = lookup_journal_in_cursum(journal, -- 2.13.0.67.g10c78a162fa8