Minchan Kim <minchan@xxxxxxxxxx> writes: > On Tue, Oct 24, 2017 at 10:47:00AM +0800, Huang, Ying wrote: >> From: Ying Huang <ying.huang@xxxxxxxxx> >> >> __swp_swapcount() is used in __read_swap_cache_async(). Where the >> invalid swap entry (offset > max) may be supplied during swap >> readahead. But __swp_swapcount() will print error message for these >> expected invalid swap entry as below, which will make the users >> confusing. >> >> swap_info_get: Bad swap offset entry 0200f8a7 >> >> So the swap entry checking code in __swp_swapcount() is changed to >> avoid printing error message for it. To avoid to duplicate code with >> __swap_duplicate(), a new helper function named >> __swap_info_get_silence() is added and invoked in both places. > > It's the problem caused by readahead, not __swap_info_get which is low-end > primitive function. Instead, please fix high-end swapin_readahead to limit > to last valid block as handling to avoid swap header which is special case, > too. Yes. You are right, will send the new version. Best Regards, Huang, Ying