From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752709AbdC0KPX (ORCPT ); Mon, 27 Mar 2017 06:15:23 -0400 Received: from szxga01-in.huawei.com ([45.249.212.187]:4798 "EHLO dggrg01-dlp.huawei.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1752297AbdC0KOx (ORCPT ); Mon, 27 Mar 2017 06:14:53 -0400 From: Chao Yu To: CC: , , , Chao Yu Subject: [PATCH 2/3] f2fs: shrink blk plug region Date: Mon, 27 Mar 2017 18:14:05 +0800 Message-ID: <20170327101406.56028-2-yuchao0@huawei.com> X-Mailer: git-send-email 2.8.2.295.g3f1c1d0 In-Reply-To: <20170327101406.56028-1-yuchao0@huawei.com> References: <20170327101406.56028-1-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=0001.0A020203.58D8E5FD.00B9,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: 8dcaad72fad642d6d30d9de9f3ba44b6 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Don't use blk plug covering area where there won't be any IOs being issued. Signed-off-by: Chao Yu --- fs/f2fs/segment.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c index c1a03b0857f9..57a81f9c8c14 100644 --- a/fs/f2fs/segment.c +++ b/fs/f2fs/segment.c @@ -848,9 +848,8 @@ static int issue_discard_thread(void *data) if (kthread_should_stop()) return 0; - blk_start_plug(&plug); - mutex_lock(&dcc->cmd_lock); + blk_start_plug(&plug); list_for_each_entry_safe(dc, tmp, pend_list, list) { f2fs_bug_on(sbi, dc->state != D_PREP); @@ -860,6 +859,7 @@ static int issue_discard_thread(void *data) if (iter++ > DISCARD_ISSUE_RATE) break; } + blk_finish_plug(&plug); list_for_each_entry_safe(dc, tmp, wait_list, list) { if (dc->state == D_DONE) @@ -867,8 +867,6 @@ static int issue_discard_thread(void *data) } mutex_unlock(&dcc->cmd_lock); - blk_finish_plug(&plug); - iter = 0; congestion_wait(BLK_RW_SYNC, HZ/50); -- 2.8.2.295.g3f1c1d0