Re: [Xen-devel] ARM: Issues while Enabling hibernation in domU(linux) on jacinto-j6

[Mirela Simonovic <mirela.simonovic@xxxxxxxxxx>]

Hi,

On Wed, Jun 6, 2018 at 8:00 PM, Julien Grall <julien.grall@xxxxxxx> wrote:
> (+ Stefano, Mirela, Juergen and Boris)
>
> On 06/06/18 09:17, moin anjnawala wrote:
>>
>> Hi Julien,
>
>
> Hi,
>
>> As you specified earlier I am now able to boot using xen4.10. I am
>> using linux4.4 as dom0 as well as domU.In domU, I have enabled
>> hibenation related configs and I am trying suspend to disk.With xen
>> 4.10, hibernation is done sucessfuly but resume crashes.
>
>
> It would have been nice to switch to a more recent Linux as well because I
> don't think anyone worked on suspend/resume 2 years ago. There are effort to
> support suspend/resume in Xen (and I guess guest) but I suspect some work is
> still missing in newer kernel. Although that would be a better start than a
> 2 years old kernel for the guest.
>
>
>> I have used given config file for domU.
>> name = "domU"
>> kernel = "/ZI-uh1"
>> memory = 200
>> vcpus = 1
>> cpus = 1
>> disk = [ 'phy:/rfs1.img,xvda,rw']
>>
>> extra = 'no_console_suspend loglevel=8 console=hvc0 xenconsole=tty
>> earlyprintk=xx
>> en rw dhcp=off resume=/dev/xvda resume_offset=331776 root=/dev/xvda
>> rootwait'
>>
>> The hibernate(domU console) and resume logs are shown as below:
>>
>>
>> root@debian-jessie:~# swapon /swapfile.img
>>
>> swapon: /swapfile.img: insecure permissions 0644, 0600 suggested.
>> [   50.064545] Adding 102396k swap on /swapfile.img.  Priority:-1
>> extents:1 across:102396k SS
>> root@debian-jessie:~#
>> root@debian-jessie:~#
>> root@debian-jessie:~# echo disk > /sys/power/state
>> [   56.649793] PM: Syncing filesystems ... done.
>> [   56.686770] Freezing user space processes ... (elapsed 0.002 seconds)
>> done.
>> [   56.689454] PM: Basic memory bitmaps created
>> [   56.689497] PM: Preallocating image memory... done (allocated 11077
>> pages)
>> [   57.119960] PM: Allocated 44308 kbytes in 0.43 seconds (103.04 MB/s)
>> [   57.120010] Freezing remaining freezable tasks ... (elapsed 0.009
>> seconds) done.
>> [   58.922629] PM: freeze of devices complete after 1791.756 msecs
>> [   58.925167] PM: late freeze of devices complete after 2.485 msecs
>> [   58.927231] PM: noirq freeze of devices complete after 2.010 msecs
>> [   58.927275] Disabling non-boot CPUs ...
>> [   58.927307] PM: Creating hibernation image:
>> [   58.927307] PM: Need to copy 10790 pages
>> [   58.927307] PM: Normal pages needed: 10790 + 1024, available pages:
>> 40398
>> [   58.927307] PM: Hibernation image created (10790 pages copied)
>> [   58.928629] PM: noirq thaw of devices complete after 1.310 msecs
>> [   58.930334] PM: early thaw of devices complete after 1.589 msecs
>> [   60.634498] PM: thaw of devices complete after 1704.114 msecs
>> [   60.635878] PM: writing image.
>> [   60.680038] PM: Using 1 thread(s) for compression.
>> [   60.680038] PM: Compressing and saving image data (10801 pages)...
>> [   60.680170] PM: Image saving progress:   0%
>> [   61.288932] PM: Image saving progress:  10%
>> [   61.809937] PM: Image saving progress:  20%
>> [   61.994594] PM: Image saving progress:  30%
>> [   62.360616] PM: Image saving progress:  40%
>> [   62.583613] random: nonblocking pool is initialized
>> [   62.592295] PM: Image saving progress:  50%
>> [   62.665052] PM: Image saving progress:  60%
>> [   62.700022] PM: Image saving progress:  70%
>> [   62.759685] PM: Image saving progress:  80%
>> [   62.821796] PM: Image saving progress:  90%
>> [   62.854694] PM: Image saving progress: 100%
>> [   62.855175] PM: Image saving done.
>> [   62.855210] PM: Wrote 43204 kbytes in 2.17 seconds (19.90 MB/s)
>> [   62.863308] PM: S|
>> [   62.921029] reboot: Power down
>> root@Dom0:~#
>> root@Dom0:~#
>> root@Dom0:~#
>> root@Dom0:~#
>> root@Dom0:~#
>> root@Dom0:~#
>> root@Dom0:~#
>> root@Dom0:~#
>> root@Dom0:~# xl create -c /vnc_l.cfg
>> Parsing config from /vnc_l.cfg
>> (XEN) d2v0: vGICD: unhandled word write 0xffffffff to ICACTIVER0
>> [    0.000000] Booting Linux on physical CPU 0x0
>> [    0.000000] Initializing cgroup subsys cpuset
>> [    0.000000] Initializing cgroup subsys cpu
>> [    0.000000] Initializing cgroup subsys cpuacct
>> [    0.000000] Linux version 4.4.91-00002-g89baae6-dirty
>
>
> I don't seem to be able to find that commit in Linux and it also says dirty.
> What are your modification on top of Linux 4.4?
>
>
>> (omkar.bolla@CPU-308U) (gcc version 4.8.4 (Ubuntu/Linaro
>> 4.8.4-2ubuntu1~14.04.1) ) #107 SMP PR
>> EEMPT Tue Jun 5 16:51:21 IST 2018
>> [    0.000000] CPU: ARMv7 Processor [412fc0f2] revision 2 (ARMv7),
>> cr=50c5387d
>> [    0.000000] CPU: PIPT / VIPT nonaliasing data cache, PIPT instruction
>> cache
>> [    0.000000] Machine model: XENVM-4.10
>> [    0.000000] cma: Reserved 24 MiB at 0x4b000000
>> [    0.000000] Memory policy: Data cache writealloc
>> [    0.000000] On node 0 totalpages: 51200
>> [    0.000000] free_area_init_node: node 0, pgdat c07eb740,
>> node_mem_map cae2b000
>> [    0.000000]   Normal zone: 450 pages used for memmap
>> [    0.000000]   Normal zone: 0 pages reserved
>> [    0.000000]   Normal zone: 51200 pages, LIFO batch:15
>> [    0.000000] psci: probing for conduit method from DT.
>> [    0.000000] psci: PSCIv1.1 detected in firmware.
>> [    0.000000] psci: Using standard PSCI v0.2 function IDs
>> [    0.000000] psci: Trusted OS migration not required
>> [    0.000000] Xen 4.10 support found
>> [    0.000000] PERCPU: Embedded 11 pages/cpu @cae1d000 s15872 r8192
>> d20992 u45056
>> [    0.000000] pcpu-alloc: s15872 r8192 d20992 u45056 alloc=11*4096
>> [    0.000000] pcpu-alloc: [0] 0
>> [    0.000000] Built 1 zonelists in Zone order, mobility grouping on.
>> Total pages: 50750
>> [    0.000000] Kernel command line: no_console_suspend loglevel=8
>> console=hvc0 xenconsole=tty earlyprintk=xen rw dhcp=off
>> resume=/dev/xvda resume_offse
>> t=331776 root=/dev/xvda rootwait xen-fbfront.video=2,1024,768
>> [    0.000000] PID hash table entries: 1024 (order: 0, 4096 bytes)
>> [    0.000000] Dentry cache hash table entries: 32768 (order: 5, 131072
>> bytes)
>> [    0.000000] Inode-cache hash table entries: 16384 (order: 4, 65536
>> bytes)
>> [    0.000000] Memory: 169692K/204800K available (4636K kernel code,
>> 383K rwdata, 2568K rodata, 280K init, 295K bss, 10532K reserved,
>> 24576K cma-reserv
>> ed, 0K highmem)
>> [    0.000000] Virtual kernel memory layout:
>> [    0.000000]     vector  : 0xffff0000 - 0xffff1000   (   4 kB)
>> [    0.000000]     fixmap  : 0xffc00000 - 0xfff00000   (3072 kB)
>> [    0.000000]     vmalloc : 0xcd000000 - 0xff800000   ( 808 MB)
>> [    0.000000]     lowmem  : 0xc0000000 - 0xcc800000   ( 200 MB)
>> [    0.000000]     pkmap   : 0xbfe00000 - 0xc0000000   (   2 MB)
>> [    0.000000]     modules : 0xbf800000 - 0xbfe00000   (   6 MB)
>> [    0.000000]       .text : 0xc0008000 - 0xc048f2c4   (4637 kB)
>> [    0.000000]       .init : 0xc0748000 - 0xc078e000   ( 280 kB)
>> [    0.000000]       .data : 0xc078e000 - 0xc07ede40   ( 384 kB)
>> [    0.000000]        .bss : 0xc07ef000 - 0xc0838dd8   ( 296 kB)
>> [    0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
>> [    0.000000] Preemptible hierarchical RCU implementation.
>> [    0.000000]  Build-time adjustment of leaf fanout to 32.
>> [    0.000000]  RCU restricting CPUs from NR_CPUS=2 to nr_cpu_ids=1.
>> [    0.000000] RCU: Adjusting geometry for rcu_fanout_leaf=32,
>> nr_cpu_ids=1
>> [    0.000000] NR_IRQS:16 nr_irqs:16 16
>> [    0.000000] Architected cp15 timer(s) running at 6.14MHz (virt).
>> [    0.000000] clocksource: arch_sys_counter: mask: 0xffffffffffffff
>> max_cycles: 0x16ac02862, max_idle_ns: 440795202218 ns
>> [    0.000003] sched_clock: 56 bits at 6MHz, resolution 162ns, wraps
>> every 4398046511085ns
>> [    0.000012] Switching to timer-based delay loop, resolution 162ns
>> [    0.000106] Console: colour dummy device 80x30
>> [    0.002199] console [hvc0] enabled
>> [    0.002245] Calibrating delay loop (skipped), value calculated
>> using timer frequency.. 12.28 BogoMIPS (lpj=61440)
>> [    0.002318] pid_max: default: 32768 minimum: 301
>> [    0.002451] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)
>> [    0.002498] Mountpoint-cache hash table entries: 1024 (order: 0, 4096
>> bytes)
>> [    0.003131] Initializing cgroup subsys io
>> [    0.003173] Initializing cgroup subsys memory
>> [    0.003231] Initializing cgroup subsys devices
>> [    0.003275] Initializing cgroup subsys freezer
>> [    0.003318] Initializing cgroup subsys perf_event
>> [    0.003360] Initializing cgroup subsys pids
>> [    0.003414] CPU: Testing write buffer coherency: ok
>> [    0.003668] /cpus/cpu@0 missing clock-frequency property
>> [    0.003712] CPU0: update cpu_capacity 1024
>> [    0.003744] CPU0: thread -1, cpu 0, socket 0, mpidr 80000000
>> [    0.004068] xen:grant_table: Grant tables using version 1 layout
>> [    0.004156] Grant table initialized
>> [    0.004234] xen:events: Using FIFO-based ABI
>> [    0.004284] Xen: initializing cpu0
>> [    0.004390] Setting up static identity map for 0x40008240 - 0x40008294
>> [    0.050408] Brought up 1 CPUs
>> [    0.050445] SMP: Total of 1 processors activated (12.28 BogoMIPS).
>> [    0.226433] CPU: All CPU(s) started in SVC mode.
>> [    0.226486] CPU0: update max cpu_capacity 1024
>> [    0.227460] devtmpfs: initialized
>> [    0.236617] VFP support v0.3: implementor 41 architecture 4 part 30
>> variant f rev 0
>> [    0.236994] clocksource: jiffies: mask: 0xffffffff max_cycles:
>> 0xffffffff, max_idle_ns: 19112604462750000 ns
>> [    0.237075] futex hash table entries: 256 (order: 2, 16384 bytes)
>> [    0.247162] pinctrl core: initialized pinctrl subsystem
>> [    0.248072] NET: Registered protocol family 16
>> [    0.249662] DMA: preallocated 256 KiB pool for atomic coherent
>> allocations
>> [    0.273657] hw-breakpoint: Failed to enable monitor mode on CPU 0.
>> [    0.387619] xen:balloon: Initialising balloon driver
>> [    0.590742] xen_balloon: Initialising balloon driver
>> [    0.592211] media: Linux media interface: v0.10
>> [    0.592310] Linux video capture interface: v2.00
>> [    0.592383] pps_core: LinuxPPS API ver. 1 registered
>> [    0.592420] pps_core: Software ver. 5.3.6 - Copyright 2005-2007
>> Rodolfo Giometti <giometti@xxxxxxxx>
>> [    0.592498] PTP clock support registered
>> [    0.592571] EDAC MC: Ver: 3.0.0
>> [    0.598236] Advanced Linux Sound Architecture Driver Initialized.
>> [    0.599323] clocksource: Switched to clocksource arch_sys_counter
>> [    0.610934] NET: Registered protocol family 2
>> [    0.611463] TCP established hash table entries: 2048 (order: 1, 8192
>> bytes)
>> [    0.611528] TCP bind hash table entries: 2048 (order: 2, 16384 bytes)
>> [    0.611604] TCP: Hash tables configured (established 2048 bind 2048)
>> [    0.611682] UDP hash table entries: 256 (order: 1, 8192 bytes)
>> [    0.611741] UDP-Lite hash table entries: 256 (order: 1, 8192 bytes)
>> [    0.611921] NET: Registered protocol family 1
>> [    0.629499] RPC: Registered named UNIX socket transport module.
>> [    0.629548] RPC: Registered udp transport module.
>> [    0.629585] RPC: Registered tcp transport module.
>> [    0.629621] RPC: Registered tcp NFSv4.1 backchannel transport module.
>> [    0.629674] PCI: CLS 0 bytes, default 64
>> [    0.669371] squashfs: version 4.0 (2009/01/31) Phillip Lougher
>> [    0.689724] NFS: Registering the id_resolver key type
>> [    0.689788] Key type id_resolver registered
>> [    0.689820] Key type id_legacy registered
>> [    0.689912] ntfs: driver 2.1.32 [Flags: R/O].
>> [    0.692559] Block layer SCSI generic (bsg) driver version 0.4
>> loaded (major 247)
>> [    0.692623] io scheduler noop registered
>> [    0.692659] io scheduler deadline registered
>> [    0.692725] io scheduler cfq registered (default)
>> [    0.801768] Console: switching to colour frame buffer device 100x37
>> [    0.807703] xen:xen_evtchn: Event-channel device installed
>> [    0.860618] Serial: 8250/16550 driver, 10 ports, IRQ sharing disabled
>> [    0.863176] [drm] Initialized drm 1.1.0 20060810
>> [    1.185970] brd: module loaded
>> [    1.339782] loop: module loaded
>> [    1.342441] libphy: Fixed MDIO Bus: probed
>> [    1.343226] xen_netfront: Initialising Xen virtual ethernet driver
>> [    1.363729] mousedev: PS/2 mouse device common for all mice
>> [    1.402163] input: Xen Virtual Keyboard as
>> /devices/virtual/input/input0
>> [    1.402805] input: Xen Virtual Pointer as /devices/virtual/input/input1
>> [    1.415272] i2c /dev entries driver
>> [    1.416302] ledtrig-cpu: registered to indicate activity on CPUs
>> [    1.418098] NET: Registered protocol family 10
>> [    1.419445] blkfront: xvda: flush diskcache: enabled; persistent
>> grants: enabled; indirect descriptors: enabled;
>> [    1.429716] sit: IPv6 over IPv4 tunneling driver
>> [    1.430399] NET: Registered protocol family 17
>> [    1.430570] Key type dns_resolver registered
>> [    1.430743] Registering SWP/SWPB emulation handler
>> [    1.549644] hctosys: unable to open rtc device (rtc0)
>> [    1.549805] PM: Checking hibernation image partition /dev/xvda
>> [    1.549867] PM: Hibernation image partition 202:0 present
>> [    1.549892] PM: Looking for hibernation image.
>> [    1.565902] PM: Image signature found, resuming
>> [    1.569834] PM: Preparing processes for restore.
>> [    1.569923] Freezing user space processes ... (elapsed 0.000 seconds)
>> done.
>> [    1.569926] PM: Loading hibernation image.
>> [    1.569958] PM: Basic memory bitmaps created
>> [    1.595098] PM: Using 1 thread(s) for decompression.
>> [    1.595098] PM: Loading and decompressing image data (10801 pages)...
>> [    1.826173] PM: Image loading progress:   0%
>> [    1.892454] PM: Image loading progress:  10%
>> [    1.925053] PM: Image loading progress:  20%
>> [    1.959479] PM: Image loading progress:  30%
>> [    1.991475] PM: Image loading progress:  40%
>> [    2.018025] PM: Image loading progress:  50%
>> [    2.048493] PM: Image loading progress:  60%
>> [    2.072979] PM: Image loading progress:  70%
>> [    2.100511] PM: Image loading progress:  80%
>> [    2.133094] PM: Image loading progress:  90%
>> [    2.162493] PM: Image loading progress: 100%
>> [    2.162758] PM: Image loading done.
>> [    2.162806] PM: Read 43204 kbytes in 0.56 seconds (77.15 MB/s)
>> [    2.170238] PM: Image successfully loaded
>> [    3.414275] PM: quiesce of devices complete after 1242.505 msecs
>> [    3.416950] PM: late quiesce of devices complete after 2.627 msecs
>> [    3.441364] PM: noirq quiesce of devices complete after 24.364 msecs
>> [    3.441414] Disabling non-boot CPUs ...
>> [   58.929359] PM: noirq restore of devices complete after 2.041 msecs
>> [   58.931802] PM: early restore of devices complete after 2.335 msecs
>> [   58.973057] xenbus: Failed to release watch
>> /local/domain/0/backend/vbd/1/51712/state: -2
>> [   58.973936] Unhandled fault: terminal exception (0x002) at 0xcd042a70
>> [   58.973978] pgd = c9a10000
>> [   58.973995] [cd042a70] *pgd=4a805811, *pte=3800266f, *ppte=3800241f
>> [   58.974052] Internal error: : 2 [#1] PREEMPT SMP THUMB2
>> [   58.974081] Modules linked in:
>> [   58.974116] CPU: 0 PID: 296 Comm: bash Tainted: G        W
>> 4.4.91-00002-g89baae6-dirty #107
>> [   58.974157] Hardware name: Generic DT based system
>> [   58.974184] task: c984ce00 task.stack: c99da000
>> [   58.974226] PC is at gnttab_end_foreign_access_ref_v1+0xe/0x5c
>> [   58.974264] LR is at gnttab_end_foreign_access_ref+0x13/0x2c
>> [   58.974299] pc : [<c024668a>]    lr : [<c0246843>]    psr: 600000b3
>> [   58.974299] sp : c99dbd5c  ip : 00000000  fp : c9c22480
>> [   58.974354] r10: ca220000  r9 : 00000100  r8 : 00000200
>> [   58.974381] r7 : 0000054e  r6 : ca230800  r5 : 0000054e  r4 : 00000000
>> [   58.974414] r3 : cd040000  r2 : cd042a70  r1 : 00000000  r0 : 0000054e
>> [   58.974450] Flags: nZCv  IRQs off  FIQs on  Mode SVC_32  ISA Thumb
>> Segment none
>> [   58.974490] Control: 50c5387d  Table: 49a1006a  DAC: 00000051
>> [   58.974523]
>> [   58.974523] PC: 0xc024660a:
>> [   58.974549] 6608  f07bd508 4620fe95 f9f6f07f fc06f07c fe94f07b
>> 23acf243 f2cc4620 21000349
>> [   58.974707] 6628  f853681b f5e23025 b002fffd bf00bd70 f245b410
>> f2cc6480 2b000482 2301bf0c
>> [   58.974888] 6648  68a42305 46a468a4 4b04f85d bf004760 6380f245
>> 0382f2cc f83368db f0000030
>> [   58.975070] 6668  47700018 6380f245 0382f2cc 695b689b bf004718
>> 6380f245 f2cc2100 b4100382
>> [   58.975251] 6688  eb0368db f83302c0 f0133030 d1170f18 8f5bf3bf
>> f000f8b2 4f5fe8d2 0000f04f
>> [   58.975432] 66a8  0f03ea94 e8c2bf08 28001f50 b2a4d1f4 8f5bf3bf
>> d00742a3 f0134623 d0e70f18
>> [   58.975587] 66c8  f85d2000 47704b04 f85d2001 47704b04 f245b410
>> f2cc6480 23020482 68a468a4
>> [   58.975712] 66e8  f85d46a4 47604b04 6380f245 0382f2cc 691b689b
>> bf004718 f1a06800 fab030ff
>> [   58.975838] 6708  0940f080 bf004770 6380f245 0382f2cc 0a8cb430
>> f3c1691a 68030509 2024f852
>> [   58.975973]
>> [   58.975973] LR: 0xc02467c3:
>> [   58.976011] 67c0  f06f4770 4770001b f245b470 f2cc6580 00c60582
>> 199a68eb 3030f833 0104f003
>> [   58.976144] 67e0  b9c9b289 8f5bf3bf f000f8b2 4f5fe8d2 0000f04f
>> 0f03ea94 e8c2bf08 28001f50
>> [   58.976271] 6800  f3bfd1f4 b2a48f5b d00d42a3 07588813 071bd5e8
>> 8813d402 d5fc071b 8f4ff3bf
>> [   58.976396] 6820  441e68eb b1086870 4770bc70 bf00de02 f245b538
>> f2cc6380 46050382 68db689b
>> [   58.976520] 6840  46044798 2401b110 bd384620 3078f241 f2cc4629
>> f6570068 e7f5fc37 b085b500
>> [   58.976646] 6860  f647a904 200673f0 f8212201 46693d10 fabaf5c7
>> db032800 300cf9bd b1039802
>> [   58.976751] 6880  b0052004 fb04f85d f7ffb538 f245ffe7 f2cc6480
>> 69630482 b1234605 461842ab
>> [   58.976876] 68a0  4628bf28 f7ffbd38 4603ffd9 616042ab bf284618
>> bd384628 1300f242 0379f2cc
>> [   58.977011] 68c0  47f0e92d 789b460c 1c4eb088 f245b37b f2cc6a80
>> f8da0a82 429e301c 4605d864
>> [   58.977147]
>> [   58.977147] SP: 0xc99dbcdc:
>> [   58.977187] bcdc  00000000 c99dbd7c 00000001 c9de9c00 c024668a
>> 600000b3 ffffffff c99dbd3c
>> [   58.977322] bcfc  00000200 00000100 c0011cfb 0000054e 00000000
>> cd042a70 cd040000 00000000
>> [   58.977457] bd1c  0000054e ca230800 0000054e 00000200 00000100
>> ca220000 c9c22480 00000000
>> [   59.064426] bd3c  c99dbd5c c0246843 c024668a 600000b3 ffffffff
>> 00000051 caf8e4c4 c02d9abd
>> [   59.064521] bd5c  00000000 c9c22488 00000000 00000000 c024732f
>> c9de9c00 ca2308d8 ca230800
>> [   59.064615] bd7c  c9c22c80 ca2308d8 ca230800 ca2308b0 c02d9aed
>> c02da569 ca220000 ca8ac200
>> [   59.064710] bd9c  ca8ac200 c07cf0fc 00000000 ca8ac220 00000040
>> c082be78 c02da581 c02da569
>> [   59.064822] bdbc  ca8ac220 00000000 c024c8ed 00000000 00000000
>> 00000040 00000000 00000000
>> [   59.064917]
>> [   59.064917] FP: 0xc9c22400:
>> [   59.064947] 2400  00000000 caf8a72c c9c223c8 c9c22448 00000000
>> 00000000 00000000 00000000
>> [   59.065041] 2420  00000000 00000000 00000000 00000000 00000000
>> 00000000 00000000 00000000
>> [   59.065139] 2440  00000000 caf8a750 c9c22408 c9e6bf08 00000000
>> 00000000 00000000 00000000
>> [   59.065233] 2460  00000000 00000000 00000000 00000000 00000000
>> 00000000 00000000 00000000
>> [   59.065327] 2480  0000056e caf8a774 c9c224c8 ca2308b0 00000000
>> 00000000 00000000 00000000
>> [   59.065424] 24a0  00000000 00000000 00000000 00000000 00000000
>> 00000000 00000000 00000000
>> [   59.065518] 24c0  0000056d caf8a798 c9c22508 c9c22488 00000000
>> 00000000 00000000 00000000
>> [   59.065609] 24e0  00000000 00000000 00000000 00000000 00000000
>> 00000000 00000000 00000000
>> [   59.065728]
>
>
>
> That's the only log you have? I would have at least expected a stack trace
> afterwards.
>
>>
>> Can you point me towards what could be the issue ? If any other
>> information is needed then I can provide it to you.
>
>
> Looking at the log and Linux 4.17, none of the PV drivers seem to have
> suspend/resume callback. This might be the reason of the crash as from Xen
> PoV this is a new guest so the memory and event channel have not been
> configured. The guest should really do it again.
>
> It looks like there are some code in drivers/xen/manage.c to handle suspend
> request from the toolstack. I am not entirely sure why we need our own way
> to suspend and not re-used the Linux one.
>
> Jurgen, Boris, do you know if suspend-to-disk from the guest console works
> on x86?
>
> Mirela, as you are working on suspend/resume. Have you looked at the guest
> side? If so, do you have any insights on the problem?

Yes, the support for guest suspend to RAM in Xen is required. I'm
preparing that series for the submission.
Briefly, the suspend to RAM relies on PSCI system_suspend. Xen has to
support resuming a suspended guest from an entry point that is
provided as system suspend argument, as well as some other vcpu
context/device related stuff. That is not supported today.

Although suspend-to-disk/hibernate has a lots in common with suspend
to RAM, I believe it has nothing to do with PSCI system suspend and
the suspend flow I'm implementing in Xen. These features should be
independent and mechanisms shouldn't have anything in common from the
perspective of supporting the guest suspend to ram vs disk in Xen.
Hibernate should rather be based on shutdown or so, but I'm not
familiar with the details.

Sorry if I wasn't really helpful. I hope others can comment and point
you in the right direction.

Best regards,
Mirela

>
> Cheers,
>
> --
> Julien Grall

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