From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933010AbbJIAbb (ORCPT ); Thu, 8 Oct 2015 20:31:31 -0400 Received: from mail.kernel.org ([198.145.29.136]:57602 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932817AbbJIAb2 (ORCPT ); Thu, 8 Oct 2015 20:31:28 -0400 From: Jaegeuk Kim To: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net Cc: Jaegeuk Kim Subject: [PATCH 2/2] Revert "f2fs: do not skip dentry block writes" Date: Thu, 8 Oct 2015 17:29:26 -0700 Message-Id: <1444350566-37795-2-git-send-email-jaegeuk@kernel.org> X-Mailer: git-send-email 2.1.1 In-Reply-To: <1444350566-37795-1-git-send-email-jaegeuk@kernel.org> References: <1444350566-37795-1-git-send-email-jaegeuk@kernel.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The periodic checkpoint can resolve the previous issue. So, now we can use this again to improve the reported performance regression: https://lkml.org/lkml/2015/10/8/20 This reverts commit 15bec0ff5a9ba6d203178fa8772259df6207942a. --- fs/f2fs/data.c | 5 +++++ fs/f2fs/node.c | 5 +++++ fs/f2fs/node.h | 1 + fs/f2fs/segment.h | 4 +++- 4 files changed, 14 insertions(+), 1 deletion(-) diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index a903423..bc04e92 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -1340,6 +1340,11 @@ static int f2fs_write_data_pages(struct address_space *mapping, if (!get_dirty_pages(inode) && wbc->sync_mode == WB_SYNC_NONE) return 0; + if (S_ISDIR(inode->i_mode) && wbc->sync_mode == WB_SYNC_NONE && + get_dirty_pages(inode) < nr_pages_to_skip(sbi, DATA) && + available_free_memory(sbi, DIRTY_DENTS)) + goto skip_write; + /* during POR, we don't need to trigger writepage at all. */ if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) goto skip_write; diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c index 1fe49ca..4d9bedf 100644 --- a/fs/f2fs/node.c +++ b/fs/f2fs/node.c @@ -52,6 +52,11 @@ bool available_free_memory(struct f2fs_sb_info *sbi, int type) mem_size = (nm_i->nat_cnt * sizeof(struct nat_entry)) >> PAGE_CACHE_SHIFT; res = mem_size < ((avail_ram * nm_i->ram_thresh / 100) >> 2); + } else if (type == DIRTY_DENTS) { + if (sbi->sb->s_bdi->wb.dirty_exceeded) + return false; + mem_size = get_pages(sbi, F2FS_DIRTY_DENTS); + res = mem_size < ((avail_ram * nm_i->ram_thresh / 100) >> 1); } else if (type == INO_ENTRIES) { int i; diff --git a/fs/f2fs/node.h b/fs/f2fs/node.h index 51c62ed..7427e95 100644 --- a/fs/f2fs/node.h +++ b/fs/f2fs/node.h @@ -118,6 +118,7 @@ static inline void raw_nat_from_node_info(struct f2fs_nat_entry *raw_ne, enum mem_type { FREE_NIDS, /* indicates the free nid list */ NAT_ENTRIES, /* indicates the cached nat entry */ + DIRTY_DENTS, /* indicates dirty dentry pages */ INO_ENTRIES, /* indicates inode entries */ EXTENT_CACHE, /* indicates extent cache */ BASE_CHECK, /* check kernel status */ diff --git a/fs/f2fs/segment.h b/fs/f2fs/segment.h index e9afb58..ee44d34 100644 --- a/fs/f2fs/segment.h +++ b/fs/f2fs/segment.h @@ -699,7 +699,9 @@ static inline int nr_pages_to_skip(struct f2fs_sb_info *sbi, int type) if (sbi->sb->s_bdi->wb.dirty_exceeded) return 0; - if (type == NODE) + if (type == DATA) + return sbi->blocks_per_seg; + else if (type == NODE) return 3 * sbi->blocks_per_seg; else if (type == META) return MAX_BIO_BLOCKS(sbi); -- 2.1.1