linux-kernel - [PATCH] f2fs: flush dirty meta pages when flushing them

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Date:   Thu, 14 May 2020 19:15:54 -0700
From:   Jaegeuk Kim <jaegeuk@...nel.org>
To:     linux-kernel@...r.kernel.org,
        linux-f2fs-devel@...ts.sourceforge.net, kernel-team@...roid.com
Cc:     Jaegeuk Kim <jaegeuk@...nel.org>
Subject: [PATCH] f2fs: flush dirty meta pages when flushing them

Let's guarantee flusing dirty meta pages to avoid infinite loop.

Signed-off-by: Jaegeuk Kim <jaegeuk@...nel.org>
---
 fs/f2fs/checkpoint.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index 620a386d82c1a..9a7f695d5adb3 100644
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -1266,6 +1266,9 @@ void f2fs_wait_on_all_pages(struct f2fs_sb_info *sbi, int type)
 		if (unlikely(f2fs_cp_error(sbi)))
 			break;
 
+		if (type == F2FS_DIRTY_META)
+			f2fs_sync_meta_pages(sbi, META, LONG_MAX,
+							FS_CP_META_IO);
 		io_schedule_timeout(DEFAULT_IO_TIMEOUT);
 	}
 	finish_wait(&sbi->cp_wait, &wait);
@@ -1493,8 +1496,6 @@ static int do_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
 	sbi->last_valid_block_count = sbi->total_valid_block_count;
 	percpu_counter_set(&sbi->alloc_valid_block_count, 0);
 
-	/* Here, we have one bio having CP pack except cp pack 2 page */
-	f2fs_sync_meta_pages(sbi, META, LONG_MAX, FS_CP_META_IO);
 	/* Wait for all dirty meta pages to be submitted for IO */
 	f2fs_wait_on_all_pages(sbi, F2FS_DIRTY_META);
 
-- 
2.26.2.761.g0e0b3e54be-goog