On Mon, Jan 27, 2020 at 6:16 AM Michal Hocko <mhocko@xxxxxxxxxx> wrote: > > On Fri 24-01-20 08:37:12, Luigi Semenzato wrote: > [...] > > The purpose of my documentation patch was to make it clearer that > > hibernation may fail in situations in which suspend-to-RAM works; for > > instance, when there is no swap, and anonymous pages are over 50% of > > total RAM. I will send a new version of the patch which hopefully > > makes this clearer. > > I was under impression that s2disk is pretty much impossible without any > swap. I am not sure what you mean by "swap" here. S2disk needs a swap partition for storing the image, but that partition is not used for regular swap. If there is no swap, but more than 50% of RAM is free or reclaimable, s2disk works fine. If anonymous is more than 50%, hibernation can still work, but swap needs to be set up (in addition to the space for the hibernation image). The setup is not obvious and I don't think that the documentation is clear on this. > -- > Michal Hocko > SUSE Labs
