lkml.org 
[lkml]   [2020]   [Jan]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRe: [PATCH 1/2] Documentation: clarify limitations of hibernation
On Mon, Jan 27, 2020 at 6:16 AM Michal Hocko <mhocko@kernel.org> 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

\
 
 \ /
  Last update: 2020-01-27 17:14    [W:0.104 / U:0.288 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site