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f2fs: fix to check page dirty status before writeback

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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>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Chao Yu 2020-06-19 17:14:19 +08:00 committed by Jaegeuk Kim
parent d078319d06
commit eb1353cfa9
1 changed files with 6 additions and 0 deletions
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6
fs/f2fs/compress.c
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@ -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;
}