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Message-ID: <31aa7758-f854-4f96-8041-26b7197982df@molgen.mpg.de>
Date: Fri, 29 Mar 2024 19:59:14 +0100
From: Paul Menzel <pmenzel@...gen.mpg.de>
To: Pavel Machek <pavel@....cz>
Cc: "Rafael J. Wysocki" <rafael@...nel.org>, linux-pm@...r.kernel.org,
LKML <linux-kernel@...r.kernel.org>
Subject: Re: PM: hibernation: Image allocation is 28906 pages short
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
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