linux-kernel - [PATCH v3 RESEND] f2fs: add bug_on when f2fs

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Date:   Fri, 17 Nov 2017 09:09:08 +0800
From:   Yunlong Song <yunlong.song@...wei.com>
To:     <jaegeuk@...nel.org>, <chao@...nel.org>, <yuchao0@...wei.com>,
        <yunlong.song@...oud.com>, <yunlong.song@...wei.com>
CC:     <miaoxie@...wei.com>, <bintian.wang@...wei.com>,
        <linux-fsdevel@...r.kernel.org>,
        <linux-f2fs-devel@...ts.sourceforge.net>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH v3 RESEND] f2fs: add bug_on when f2fs_gc even fails to get one victim

This can help to find potential bugs on some corner case.

Signed-off-by: Yunlong Song <yunlong.song@...wei.com>
---
 fs/f2fs/gc.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
index 5d5bba4..c89128b 100644
--- a/fs/f2fs/gc.c
+++ b/fs/f2fs/gc.c
@@ -1035,6 +1035,7 @@ int f2fs_gc(struct f2fs_sb_info *sbi, bool sync,
 		goto stop;
 	}
 	if (!__get_victim(sbi, &segno, gc_type)) {
+		f2fs_bug_on(sbi, !total_freed && has_not_enough_free_secs(sbi, 0, 0));
 		ret = -ENODATA;
 		goto stop;
 	}
-- 
1.8.5.2