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Since about a month, possibly due to software updates, after a couple of days running several VMs, one of the VM guests crashes and the VM host is not stable anymore. I need to shutdown all the remaining VM guests (if possible) and reboot the server by hardware (sudo reboot hangs).

Does anybody have a suggestion how to analyze/resolve this?

All help is appreciated!

Xen: 4.9.0

OS (Dom0): Arch Linux 4.13.7

Dmesg:

[131395.101610] BUG: unable to handle kernel paging request at ffff88401920c018

[131395.101715] IP: gntdev_vma_find_special_page+0x1d/0x30 [xen_gntdev]

[131395.101796] PGD 1a0a067

[131395.101797] P4D 1a0a067

[131395.101832] PUD 0

[131395.101922] Oops: 0000 [#1] PREEMPT SMP

[131395.101975] Modules linked in: xt_nat xt_physdev br_netfilter xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat tun bridge stp llc ebtable_filter ebtables devlink ipt_REJECT nf_reject_ipv4 xt_tcpudp nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack libcrc32c crc32c_generic ip6table_filter iptable_filter ip6_tables snd_hda_codec_realtek amdkfd snd_hda_codec_generic snd_hda_codec_hdmi amd_iommu_v2 snd_hda_intel radeon joydev snd_hda_codec mousedev evdev input_leds led_class mac_hid ppdev wmi_bmof snd_hda_core i2c_algo_bit ttm snd_hwdep snd_pcm edac_mce_amd drm_kms_helper crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel snd_timer pcbc r8169 aesni_intel psmouse aes_x86_64 crypto_simd glue_helper tpm_infineon drm cryptd tpm_tis snd pcspkr

[131395.102862] agpgart sp5100_tco tpm_tis_core mii syscopyarea sysfillrect tpm i2c_piix4 sysimgblt soundcore parport_pc parport fb_sys_fops fam15h_power k10temp wmi shpchp button sch_fq_codel xen_acpi_processor xen_pciback xen_netback xen_blkback xenfs xen_gntalloc xen_gntdev xen_evtchn xen_privcmd ip_tables x_tables ext4 crc16 mbcache jbd2 fscrypto hid_generic usbhid hid sd_mod ata_generic pata_acpi ohci_pci pata_atiixp serio_raw atkbd libps2 ahci ehci_pci libahci ehci_hcd ohci_hcd libata usbcore scsi_mod usb_common i8042 serio

[131395.103469] CPU: 0 PID: 10887 Comm: qemu-dm Not tainted 4.13.7-1-ARCH #1

[131395.103554] Hardware name: MICRO-STAR INTERNATIONAL CO.,LTD MS-7596/760GM-E51(MS-7596), BIOS V3.6 10/26/2012

[131395.103677] task: ffff8800483b1e00 task.stack: ffffc90046598000

[131395.103759] RIP: e030:gntdev_vma_find_special_page+0x1d/0x30 [xen_gntdev]

[131395.103852] RSP: e02b:ffffc9004659bb60 EFLAGS: 00010212

[131395.103927] RAX: ffff88001ef0a360 RBX: ffff8800119a0cb8 RCX: 0000000000624684

[131395.104018] RDX: 8000000624684367 RSI: 00000007ff460397 RDI: ffff88003dd7b240

[131395.104108] RBP: ffffc9004659bb70 R08: ffff88003dd7b240 R09: 00007ff4603a2000

[131395.104198] R10: 0000000000000001 R11: 00003ffffffff000 R12: 00007ff460397000

[131395.104288] R13: 8000000624684367 R14: 00007ff460398000 R15: ffffc9004659bce0

[131395.104390] FS: 00007ff4605667c0(0000) GS:ffff880055000000(0000) knlGS:0000000000000000

[131395.104490] CS: e033 DS: 0000 ES: 0000 CR0: 0000000080050033

[131395.104564] CR2: ffff88401920c018 CR3: 000000001cb0f000 CR4: 0000000000040660

[131395.104655] Call Trace:

[131395.104695] ? vm_normal_page+0x5d/0xa0

[131395.104748] unmap_page_range+0x4e3/0x930

[131395.104804] unmap_single_vma+0x7d/0xf0

[131395.104857] unmap_vmas+0x51/0xb0

[131395.104904] unmap_region+0xbd/0x130

[131395.104953] ? gnttab_map_refs+0xc4/0x160

[131395.105009] ? gntdev_mmap+0x3a4/0x610 [xen_gntdev]

[131395.105074] mmap_region+0x461/0x5f0

[131395.105122] do_mmap+0x2b3/0x400

[131395.105167] vm_mmap_pgoff+0xcc/0x120

[131395.105217] SyS_mmap_pgoff+0x1bc/0x230

[131395.105271] SyS_mmap+0x1b/0x30

[131395.108716] entry_SYSCALL_64_fastpath+0x1a/0xa5

[131395.112161] RIP: 0033:0x7ff45dcc3e63

[131395.115644] RSP: 002b:00007ffdf0c57648 EFLAGS: 00000246 ORIG_RAX: 0000000000000009

[131395.119149] RAX: ffffffffffffffda RBX: 000000000000a000 RCX: 00007ff45dcc3e63

[131395.122587] RDX: 0000000000000002 RSI: 000000000000b000 RDI: 0000000000000000

[131395.126005] RBP: 0000000000001000 R08: 000000000000002a R09: 000000000000c000

[131395.129509] R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000001

[131395.132989] R13: 0000560471ae8e00 R14: 0000560471a66290 R15: 0000000000000000

[131395.136568] Code: 5b 5d c3 90 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 8b 87 a8 00 00 00 55 48 89 e5 48 2b 70 68 48 8b 40 60 5d 48 c1 ee 0c <48> 8b 04 f0 c3 0f 1f 40 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f

[131395.143798] RIP: gntdev_vma_find_special_page+0x1d/0x30 [xen_gntdev] RSP: ffffc9004659bb60

[131395.147367] CR2: ffff88401920c018

[131395.150844] ---[ end trace bf61e71da2f22d1c ]---

xl info:

host : orion1695

release : 4.13.7-1-ARCH

version : #1 SMP PREEMPT Sat Oct 14 20:13:26 CEST 2017

machine : x86_64

nr_cpus : 8

max_cpu_id : 23

nr_nodes : 1

cores_per_socket : 4

threads_per_core : 2

cpu_mhz : 2300

hw_caps : 178bf3ff:b698320b:2e500800:0069bfff:00000000:00000008:00000000:00000500

virt_caps : hvm

total_memory : 32510

free_memory : 30751

sharing_freed_memory : 0

sharing_used_memory : 0

outstanding_claims : 0

free_cpus : 0

xen_major : 4

xen_minor : 9

xen_extra : .0

xen_version : 4.9.0

xen_caps : xen-3.0-x86_64 xen-3.0-x86_32p hvm-3.0-x86_32 hvm-3.0-x86_32p hvm-3.0-x86_64

xen_scheduler : credit

xen_pagesize : 4096

platform_params : virt_start=0xffff800000000000

xen_changeset :

xen_commandline : /boot/xen-4.9.0.gz dom0_mem=1400M,max:1400M dom0pvh=1 ucode=-1

cc_compiler : gcc (GCC) 7.1.1 20170630

cc_compile_by : arthur

cc_compile_domain : startdedicated.com

cc_compile_date : Mon Aug 28 11:12:45 CEST 2017

build_id : 3fb8c28a1eec9d8b7f15f6ba17bf8feb9c20c99c

xend_config_format : 4

Best Regards,

Arthur Borsboom

[Xen-devel] [BUG] xen_gntdev - gntdev_vma_find_special_page - unable to handle kernel paging request