Re: PM: hibernation: Image allocation is 28906 pages short

[Paul Menzel]

Dear Pavel,


Thank you very much.


Am 29.03.24 um 18:03 schrieb Pavel Machek:

> > On a Dell XPS 13 9360/0596KF, BIOS 2.21.0 06/02/2022 with Debian
> > sid/unstable and self-built Linux 6.9-rc1+ with one patch on top [1] and
> > KASAN enabled
> >
> >      $ git log --no-decorate --oneline -2 a2ce022afcbb
> >      a2ce022afcbb [PATCH] kbuild: Disable KCSAN for autogenerated *.mod.c intermediaries
> >      8d025e2092e2 Merge tag 'erofs-for-6.9-rc2-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs
> >
> > the system tried to hibernate, but failed:
>
> > Where is that image allocated? On the disk? There is still 65 GB of space,
> > so 16 GB of memory should fit? Could the error message be improved, so users
> > know more details to fix it?
>
> In swap. See docs.

Thank you. Unfortunately, I am not seeing my case described in 
`Documentation/power/`. Only:

> Q:
>   If my application(s) causes lots of memory & swap space to be used
>   (over half of the total system RAM), is it correct that it is likely
>   to be useless to try to suspend to disk while that app is running?
>
> A:
>   No, it should work okay, as long as your app does not mlock()
>   it. Just prepare big enough swap partition.

I have 16 GB RAM and 8 GB swap partition.

    $ LANG= free
                   total        used        free      shared 
buff/cache   available
    Mem:        13828768     9760192     3115932     5383256 
6681400     4068576
    Swap:        8387904     1531820     6856084

Shouldn’t user space (systemd or GNOME?) then know beforehand if 
hibernate is possible? Is there a script for users to check, if 
hibernation would be possible?


Kind regards,

Paul