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Date: Mon, 24 Aug 2020 10:29:07 +0200 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Chao Yu <yuchao0@...wei.com>, Jaegeuk Kim <jaegeuk@...nel.org>, Sasha Levin <sashal@...nel.org> Subject: [PATCH 5.8 049/148] f2fs: fix to check page dirty status before writeback From: Chao Yu <yuchao0@...wei.com> [ Upstream commit eb1353cfa9c1e9415b03dc117f8399969fa02102 ] In f2fs_write_raw_pages(), we need to check page dirty status before writeback, because there could be a racer (e.g. reclaimer) helps writebacking the dirty page. Signed-off-by: Chao Yu <yuchao0@...wei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@...nel.org> Signed-off-by: Sasha Levin <sashal@...nel.org> --- fs/f2fs/compress.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c index f6fbe61b1251e..2390f7943f6c8 100644 --- a/fs/f2fs/compress.c +++ b/fs/f2fs/compress.c @@ -1310,6 +1310,12 @@ retry_write: congestion_wait(BLK_RW_ASYNC, DEFAULT_IO_TIMEOUT); lock_page(cc->rpages[i]); + + if (!PageDirty(cc->rpages[i])) { + unlock_page(cc->rpages[i]); + continue; + } + clear_page_dirty_for_io(cc->rpages[i]); goto retry_write; } -- 2.25.1
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