linux-kernel - [PATCH 2/2] fs: Don't create discard thread when device not support realtime discard

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Message-Id: <20210811131826.223141-2-frank.li@vivo.com>
Date:   Wed, 11 Aug 2021 21:18:26 +0800
From:   Yangtao Li <frank.li@...o.com>
To:     jaegeuk@...nel.org, chao@...nel.org
Cc:     linux-f2fs-devel@...ts.sourceforge.net,
        linux-kernel@...r.kernel.org,
        Fengnan Chang <changfengnan@...o.com>,
        Yangtao Li <frank.li@...o.com>
Subject: [PATCH 2/2] fs: Don't create discard thread when device not support realtime discard

From: Fengnan Chang <changfengnan@...o.com>

Don't create discard thread when device not support realtime discard.

Signed-off-by: Fengnan Chang <changfengnan@...o.com>
Signed-off-by: Yangtao Li <frank.li@...o.com>
---
 fs/f2fs/segment.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index 363779a4402d..bc4ac46f3041 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -2161,6 +2161,8 @@ static int create_discard_cmd_control(struct f2fs_sb_info *sbi)
 	init_waitqueue_head(&dcc->discard_wait_queue);
 	SM_I(sbi)->dcc_info = dcc;
 init_thread:
+	if (!f2fs_realtime_discard_enable(sbi))
+		return err;
 	dcc->f2fs_issue_discard = kthread_run(issue_discard_thread, sbi,
 				"f2fs_discard-%u:%u", MAJOR(dev), MINOR(dev));
 	if (IS_ERR(dcc->f2fs_issue_discard)) {
-- 
2.32.0