[PATCH] f2fs: compress: don't compress any datas after cp stop

From: Chao Yu <yuchao0@huawei.com>
To: <jaegeuk@kernel.org>
Cc: <linux-f2fs-devel@lists.sourceforge.net>,
	<linux-kernel@vger.kernel.org>, <chao@kernel.org>,
	Chao Yu <yuchao0@huawei.com>
Subject: [PATCH] f2fs: compress: don't compress any datas after cp stop
Date: Tue, 26 May 2020 09:55:02 +0800	[thread overview]
Message-ID: <20200526015502.22313-1-yuchao0@huawei.com> (raw)

While compressed data writeback, we need to drop dirty pages like we did
for non-compressed pages if cp stops, however it's not needed to compress
any data in such case, so let's detect cp stop condition in
cluster_may_compress() to avoid redundant compressing and let following
f2fs_write_raw_pages() drops dirty pages correctly.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
---
 fs/f2fs/compress.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c
index bf152c0d79fe..a53578a89211 100644
--- a/fs/f2fs/compress.c
+++ b/fs/f2fs/compress.c
@@ -849,6 +849,8 @@ static bool cluster_may_compress(struct compress_ctx *cc)
 		return false;
 	if (!f2fs_cluster_is_full(cc))
 		return false;
+	if (unlikely(f2fs_cp_error(F2FS_I_SB(cc->inode))))
+		return false;
 	return __cluster_may_compress(cc);
 }
 
-- 
2.18.0.rc1

