On Tue, Nov 13, 2018 at 02:13:44AM +0300, Timofey Titovets wrote: > Some numbers from different not madvised workloads. > Formulas: > Percentage ratio = (pages_sharing - pages_shared)/pages_unshared > Memory saved = (pages_sharing - pages_shared)*4/1024 MiB > Memory used = free -h > > * Name: My working laptop > Description: Many different chrome/electron apps + KDE > Ratio: 5% > Saved: ~100 MiB > Used: ~2000 MiB Your _laptop_ saves 100MB of RAM? That's extraordinary. Essentially that's like getting an extra 100MB of page cache for free. Is there any observable slowdown? I could even see there being a speedup (due to your working set being allowed to be 5% larger) I am now a big fan of this patch and shall try to give it the review that it deserves.
