Hi Juergen, I have noticed that a patch has been developed an awaits the upcoming Linux kernel 4.14, maybe 4.15. In the mean time the server keeps crashing about every 2 days.
Do you know a workaround I can apply? Best regards, Arthur Borsboom. On 25 October 2017 at 16:13, Juergen Gross <jgr...@suse.com> wrote: > On 25/10/17 13:17, Arthur Borsboom wrote: > > 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? > > Hmm, it seems as if gntdev_mmap() is mapping only some pages and then > exits with an error. This will leave map->pages_vm_start as 0 leading > to a problem when the already mapped pages are being unmapped again. > > Patch will come soon... > > Can I add you as "Reported-by:" ? > > > Juergen > > > 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 <http://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 mailing list > > Xen-devel@lists.xen.org > > https://lists.xen.org/xen-devel > > > > -- Arthur Borsboom Mob: +31629089953 Email: arthurborsb...@gmail.com [image: View Arthur's LinkedIn profile] <http://uk.linkedin.com/in/arthurborsboom>
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