Wed, Jan 19, 2022 at 07:58:23AM -0500, Johannes Weiner wrote: > On Wed, Jan 19, 2022 at 06:13:54AM +0000, CGEL wrote: > > I did a test, when we use zram, it takes longer time for ksm copying than > > swap_readpage(). Ksm copying average takes 147263ns, swap_readpage() > > average takes 55639ns. So I think this patch is reasonable. > > Ok, that sounds reasonable to me as well. Please add the > PageWorkingset() check and resubmit the patch. Thanks! I am a litte confused about adding PageWorkingset(), since I think ksm_might_need_to_copy() memstall is like swap_readpage() memstall and swap_readpage() doesn't add PageWorkingset(). Would please make it cleaner? Thanks!
