linux-kernel - [PATCH] f2fs: fix to update F2FS_{CP_}WB

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Message-ID: <20170227091045.20724-1-yuchao0@huawei.com>
Date:   Mon, 27 Feb 2017 17:10:45 +0800
From:   Chao Yu <yuchao0@...wei.com>
To:     <jaegeuk@...nel.org>
CC:     <linux-f2fs-devel@...ts.sourceforge.net>,
        <linux-kernel@...r.kernel.org>, <chao@...nel.org>,
        Chao Yu <yuchao0@...wei.com>
Subject: [PATCH] f2fs: fix to update F2FS_{CP_}WB_DATA count correctly

We should only account F2FS_{CP_}WB_DATA IOs for write path, fix it.

Signed-off-by: Chao Yu <yuchao0@...wei.com>
---
 fs/f2fs/data.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index b0a2e3faabb2..1375fef11146 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -398,7 +398,8 @@ int f2fs_submit_page_mbio(struct f2fs_io_info *fio)
 		if ((fio->type == DATA || fio->type == NODE) &&
 				fio->new_blkaddr & F2FS_IO_SIZE_MASK(sbi)) {
 			err = -EAGAIN;
-			dec_page_count(sbi, WB_DATA_TYPE(bio_page));
+			if (!is_read)
+				dec_page_count(sbi, WB_DATA_TYPE(bio_page));
 			goto out_fail;
 		}
 		io->bio = __bio_alloc(sbi, fio->new_blkaddr,
-- 
2.8.2.295.g3f1c1d0