Public bug reported:
In kernel 4.4.0-97, the system snapshot can fail during suspend-to-disk
or -to-both even though the routine swsusp_save() believes that there is
enough memory for the snapshot.
What I expected to happen
=========================
After 'systemctl hibernate' or 'systemctl hybrid-sleep', the requested
suspend state is reached, or a diagnostic is provided.
What happened instead
=====================
After 'systemctl hibernate' or 'systemctl hybrid-sleep', system returns
to normal desktop with no visible diagnostic after 'systemctl hibernate'
or 'systemctl hybrid sleep'.
System log/journal shows diagnostics and backtrace, as attached:
...
Oct 17 10:51:45 Spiridion kernel: PM: Creating hibernation image:
Oct 17 10:51:45 Spiridion kernel: PM: Need to copy 174616 pages
Oct 17 10:51:45 Spiridion kernel: PM: Normal pages needed: 112567 + 1024,
available pages: 115651
Oct 17 10:51:45 Spiridion kernel: s2both: page allocation failure: order:0,
mode:0x2080120
...
Oct 17 10:51:45 Spiridion kernel: [<c13ae82f>] dump_stack+0x58/0x79
Oct 17 10:51:45 Spiridion kernel: [<c11783e6>] warn_alloc_failed+0xd6/0x110
Oct 17 10:51:45 Spiridion kernel: [<c117a994>]
__alloc_pages_slowpath.constprop.104+0x6c4/0x970
Oct 17 10:51:45 Spiridion kernel: [<c117ae66>] ?
__alloc_pages_nodemask+0x226/0x280
Oct 17 10:51:45 Spiridion kernel: [<c117ae66>]
__alloc_pages_nodemask+0x226/0x280
Oct 17 10:51:45 Spiridion kernel: [<c10c000f>] alloc_image_page+0x1f/0x40
Oct 17 10:51:45 Spiridion kernel: [<c10c1678>] swsusp_save+0x148/0x4b0
...
And the concluding entries after the memory debugging output:
Oct 17 10:51:45 Spiridion kernel: PM: Memory allocation failed
Oct 17 10:51:45 Spiridion kernel: PM: Error -12 creating hibernation image
At this point the swsusp_save() function has successfully checked for
free memory
enough_free_mem(nr_pages, nr_highmem)
and then called
swsusp_alloc(&orig_bm, ©_bm, nr_pages, nr_highmem)
So either enough_free_mem() is not sufficiently accurate or
conservative, or swsusp_alloc() is not sufficiently aggressive in using
the available memory.
This code seems to be the same at least down to the call to
alloc_image_page() in later versions, eg 4.13.7.
The functions 'systemctl hibernate', 'systemctl hybrid-sleep' have been
seen to work as expected in the identical configuration when the system
memory is more lightly loaded (eg "PM: Need to copy 103159 pages").
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-generic 4.4.0.97.102
ProcVersionSignature: Ubuntu 4.4.0-97.120-generic 4.4.87
Uname: Linux 4.4.0-97-generic i686
ApportVersion: 2.20.1-0ubuntu2.10
Architecture: i386
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: df 2143 F.... pulseaudio
CurrentDesktop: LXDE
Date: Tue Oct 17 14:52:34 2017
HibernationDevice: #RESUME=UUID=0107bf90-3e69-4f56-9a92-3477dd28b31c
InstallationDate: Installed on 2017-02-12 (247 days ago)
InstallationMedia: LXLE 16.04 - Release i386
MachineType: Dell Inc. Inspiron 1520
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-97-generic
root=UUID=b71d2286-3b2f-4856-a258-2f6bcf088c70 ro zswap.enabled=1
resume=UUID=b71d2286-3b2f-4856-a258-2f6bcf088c70 resume_offset=2363392 quiet
splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-4.4.0-97-generic N/A
linux-backports-modules-4.4.0-97-generic N/A
linux-firmware 1.157.12
RfKill:
0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 07/11/2008
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A09
dmi.board.name: 0KY767
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.modalias:
dmi:bvnDellInc.:bvrA09:bd07/11/2008:svnDellInc.:pnInspiron1520:pvr:rvnDellInc.:rn0KY767:rvr:cvnDellInc.:ct8:cvr:
dmi.product.name: Inspiron 1520
dmi.sys.vendor: Dell Inc.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: apport-bug hibernate-resume i386 xenial
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https://bugs.launchpad.net/bugs/1724265
Title:
Unexpected memory allocation failure in hibernation snapshot (swsusp)
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