From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S973533AbdDXQXx (ORCPT ); Mon, 24 Apr 2017 12:23:53 -0400 Received: from mail.kernel.org ([198.145.29.136]:46764 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S973377AbdDXQXo (ORCPT ); Mon, 24 Apr 2017 12:23:44 -0400 From: Chao Yu To: jaegeuk@kernel.org Cc: linux-f2fs-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org, Chao Yu Subject: [PATCH 1/2] f2fs: delay awaking discard thread Date: Tue, 25 Apr 2017 00:21:34 +0800 Message-Id: <20170424162135.5566-1-chao@kernel.org> X-Mailer: git-send-email 2.12.2.575.gb14f27f Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Chao Yu It's better to delay awaking discard thread while queuing discard commands in checkpoint, it will help to give more chances for merging big and small discard. Signed-off-by: Chao Yu --- fs/f2fs/segment.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c index d4bda1e54475..8097b4c8c7c7 100644 --- a/fs/f2fs/segment.c +++ b/fs/f2fs/segment.c @@ -971,7 +971,6 @@ static int __queue_discard_cmd(struct f2fs_sb_info *sbi, blkstart -= FDEV(devi).start_blk; } __update_discard_tree_range(sbi, bdev, lblkstart, blkstart, blklen); - wake_up(&SM_I(sbi)->dcc_info->discard_wait_queue); return 0; } @@ -1338,6 +1337,8 @@ void clear_prefree_segments(struct f2fs_sb_info *sbi, struct cp_control *cpc) SM_I(sbi)->dcc_info->nr_discards -= total_len; kmem_cache_free(discard_entry_slab, entry); } + + wake_up(&SM_I(sbi)->dcc_info->discard_wait_queue); } static int create_discard_cmd_control(struct f2fs_sb_info *sbi) -- 2.12.2.575.gb14f27f