> >So this is impossible without THP swapin. While 2M swapout makes a lot of >sense, I doubt 2M swapin is really useful. What kind of application is >'optimized' >to do sequential memory access?
We waste a lot of cpu cycles to re-compact 4K pages back to a large page under THP. Swapping it back in as a single large page can avoid fragmentation and this overhead. Thanks. Tim