On Wed, Sep 19, 2018 at 04:29:16PM +0900, Sergey Senozhatsky wrote: > On (09/19/18 14:18), Minchan Kim wrote: > > We need to count zero filled pages as well as other pages in zram. > > A nit, > > 'ZRAM_FLAG_SHIFT + 1' covers all ZRAM_SAME pages, not only > zero filled pages. Ah, now I got your point. I was brainfart. I will drop this patch and find other reason I have missed. Thanks, Sergey.