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| author | Jaegeuk Kim <jaegeuk@kernel.org> | 2018-10-17 05:30:13 +0300 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2018-10-23 03:54:46 +0300 |
| commit | 164a63fa6b384e30ceb96ed80bc7dc3379bc0960 (patch) | |
| tree | 693bba08dc02ec5637e8d3102a979f0801935818 | |
| parent | 5f9abab42b60e67846cd13dafc6a61d70d7a2682 (diff) | |
| download | linux-164a63fa6b384e30ceb96ed80bc7dc3379bc0960.tar.xz | |
Revert "f2fs: fix to clear PG_checked flag in set_page_dirty()"
This reverts commit 66110abc4c931f879d70e83e1281f891699364bf.
If we clear the cold data flag out of the writeback flow, we can miscount
-1 by end_io, which incurs a deadlock caused by all I/Os being blocked during
heavy GC.
Balancing F2FS Async:
- IO (CP: 1, Data: -1, Flush: ( 0 0 1), Discard: ( ...
GC thread: IRQ
- move_data_page()
- set_page_dirty()
- clear_cold_data()
- f2fs_write_end_io()
- type = WB_DATA_TYPE(page);
here, we get wrong type
- dec_page_count(sbi, type);
- f2fs_wait_on_page_writeback()
Cc: <stable@vger.kernel.org>
Reported-and-Tested-by: Park Ju Hyung <qkrwngud825@gmail.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
| -rw-r--r-- | fs/f2fs/data.c | 4 |
1 files changed, 0 insertions, 4 deletions
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index b5de10102775..bd6434ad3aa0 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -2654,10 +2654,6 @@ static int f2fs_set_data_page_dirty(struct page *page) if (!PageUptodate(page)) SetPageUptodate(page); - /* don't remain PG_checked flag which was set during GC */ - if (is_cold_data(page)) - clear_cold_data(page); - if (f2fs_is_atomic_file(inode) && !f2fs_is_commit_atomic_write(inode)) { if (!IS_ATOMIC_WRITTEN_PAGE(page)) { f2fs_register_inmem_page(inode, page); |