On Wed, Feb 28, 2018 at 08:26:11AM +0900, Minchan Kim wrote: > Huang reported PG_readahead flag marked PF_NO_COMPOUND so that > we cannot use the flag for THP page. So, we need to check first > whether page is THP or not before using TestClearPageReadahead > in lookup_swap_cache. > > This patch fixes it. > > Furthermore, swap_[cluster|vma]_readahead cannot mark PG_readahead > for newly allocated page because the allocated page is always a > normal page, not THP at this moment. So let's clean it up, too. > > Cc: Hugh Dickins <[email protected]> > Cc: "Huang, Ying" <[email protected]> > Signed-off-by: Minchan Kim <[email protected]>
Link:http://lkml.kernel.org/r/[email protected]
