Messages in this thread Patch in this message | | | From | Chao Yu <> | Subject | [PATCH] f2fs: fix to check page dirty status before writeback | Date | Fri, 19 Jun 2020 17:14:19 +0800 |
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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@huawei.com> --- fs/f2fs/compress.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c index 5643aa2b8377..ce5645b5c833 100644 --- a/fs/f2fs/compress.c +++ b/fs/f2fs/compress.c @@ -1322,6 +1322,12 @@ static int f2fs_write_raw_pages(struct compress_ctx *cc, 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; } -- 2.26.2
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