Re: Random guest crashes since 5c34d002dcc7 ("virtio_pci: use shared interrupts for virtqueues")

[Mike Galbraith]

On Thu, 2017-03-23 at 15:56 +0100, Christoph Hellwig wrote:
> Does the patch from Jason in the
> 
> "[REGRESSION] 07ec51480b5e ("virtio_pci: use shared interrupts for virtqueues") causes crashes in guest"
> 
> thread fix the issue for you?

That seems to eliminate explosions, but not the below.

07ec51480b5e causes me some kworker grief in -rt too (100% CPU), but
that's as yet not been stared at (too darn [busy/lazy], pick one;).

virgin 4.11-rc4+referenced patch, config=enterprise-ish.
...
[  158.400210] PM: Hibernation mode set to 'shutdown'
[  158.607439] PM: Syncing filesystems ... 
[  158.986595] PM: done.
[  158.986771] Freezing user space processes ... (elapsed 0.001 seconds) done.
[  158.988758] PM: Marking nosave pages: [mem 0x00000000-0x00000fff]
[  158.989156] PM: Marking nosave pages: [mem 0x0009f000-0x000fffff]
[  158.989550] PM: Marking nosave pages: [mem 0xbffde000-0xffffffff]
[  158.990200] PM: Basic memory bitmaps created
[  158.990468] PM: Preallocating image memory... done (allocated 395798 pages)
[  159.114650] PM: Allocated 1583192 kbytes in 0.12 seconds (13193.26 MB/s)
[  159.115203] Freezing remaining freezable tasks ... (elapsed 0.001 seconds) done.
[  159.119378] ------------[ cut here ]------------
[  159.122606] WARNING: CPU: 3 PID: 509 at drivers/pci/msi.c:1251 pci_irq_vector+0xcf/0xe0
[  159.123194] Modules linked in: fuse(E) ebtable_filter(E) ebtables(E) rpcsec_gss_krb5(E) nfsv4(E) dns_resolver(E) nfs(E) fscache(E) nf_log_ipv6(E) xt_pkttype(E) nf_log_ipv4(E) nf_log_common(E) xt_LOG(E) xt_limit(E) af_packet(E) iscsi_ibft(E) iscsi_boot_sysfs(E) ip6t_REJECT(E) xt_tcpudp(E) nf_conntrack_ipv6(E) nf_defrag_ipv6(E) ip6table_raw(E) ipt_REJECT(E) iptable_raw(E) xt_CT(E) iptable_filter(E) ip6table_mangle(E) nf_conntrack_netbios_ns(E) nf_conntrack_broadcast(E) nf_conntrack_ipv4(E) nf_defrag_ipv4(E) ip_tables(E) xt_conntrack(E) nf_conntrack(E) libcrc32c(E) ip6table_filter(E) ip6_tables(E) x_tables(E) snd_hda_codec_generic(E) snd_hda_intel(E) snd_hda_codec(E) snd_hda_core(E) snd_hwdep(E) joydev(E) snd_pcm(E) snd_timer(E) snd(E) crct10dif_pclmul(E) soundcore(E) crc32_pclmul(E) 8139too(E) ghash_clmulni_intel(E)
[  159.128123]  pcbc(E) aesni_intel(E) ppdev(E) i2c_piix4(E) aes_x86_64(E) virtio_balloon(E) crypto_simd(E) parport_pc(E) glue_helper(E) parport(E) button(E) pcspkr(E) cryptd(E) serio_raw(E) acpi_cpufreq(E) nfsd(E) dm_mod(E) auth_rpcgss(E) nfs_acl(E) lockd(E) grace(E) sunrpc(E) ext4(E) crc16(E) jbd2(E) mbcache(E) hid_generic(E) usbhid(E) sr_mod(E) cdrom(E) ata_generic(E) virtio_rng(E) virtio_blk(E) virtio_console(E) ata_piix(E) floppy(E) ehci_pci(E) qxl(E) drm_kms_helper(E) syscopyarea(E) uhci_hcd(E) ahci(E) ehci_hcd(E) sysfillrect(E) crc32c_intel(E) sysimgblt(E) libahci(E) fb_sys_fops(E) ttm(E) virtio_pci(E) virtio_ring(E) usbcore(E) virtio(E) 8139cp(E) drm(E) libata(E) mii(E) sg(E) scsi_mod(E) autofs4(E)
[  159.132177] CPU: 3 PID: 509 Comm: kworker/u16:6 Tainted: G            E   4.11.0-default #28
[  159.132677] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.8.1-0-g4adadbd-20161202_174313-build11a 04/01/2014
[  159.133428] Workqueue: events_unbound async_run_entry_fn
[  159.133768] Call Trace:
[  159.133933]  dump_stack+0x63/0x90
[  159.134161]  __warn+0xd1/0xf0
[  159.134360]  ? pci_pm_poweroff+0x100/0x100
[  159.134627]  warn_slowpath_null+0x1d/0x20
[  159.134889]  pci_irq_vector+0xcf/0xe0
[  159.135134]  vp_synchronize_vectors+0x46/0x60 [virtio_pci]
[  159.135486]  vp_reset+0x37/0x40 [virtio_pci]
[  159.135780]  virtcons_freeze+0x23/0xa0 [virtio_console]
[  159.136116]  virtio_device_freeze+0x6b/0x80 [virtio]
[  159.136431]  virtio_pci_freeze+0x1d/0x40 [virtio_pci]
[  159.136756]  pci_pm_freeze+0x5f/0xe0
[  159.136999]  dpm_run_callback+0x59/0x180
[  159.137252]  __device_suspend+0x127/0x3c0
[  159.137513]  ? pm_dev_dbg+0x80/0x80
[  159.137740]  async_suspend+0x1f/0xa0
[  159.137973]  async_run_entry_fn+0x39/0x170
[  159.138250]  process_one_work+0x16c/0x450
[  159.138514]  worker_thread+0x137/0x4e0
[  159.138761]  kthread+0x10c/0x140
[  159.138970]  ? rescuer_thread+0x3c0/0x3c0
[  159.139235]  ? kthread_park+0x90/0x90
[  159.139476]  ret_from_fork+0x2c/0x40
[  159.139721] ---[ end trace d66daafbe82e66e7 ]---
[  159.728658] PM: freeze of devices complete after 611.743 msecs
[  159.729321] PM: late freeze of devices complete after 0.243 msecs
[  159.730921] PM: noirq freeze of devices complete after 1.145 msecs
[  159.731507] Disabling non-boot CPUs ...
[  159.732004] Unregister pv shared memory for cpu 1
[  159.739017] smpboot: CPU 1 is now offline
[  159.765702] Unregister pv shared memory for cpu 2
[  159.770757] smpboot: CPU 2 is now offline
[  159.797684] Unregister pv shared memory for cpu 3
[  159.799545] smpboot: CPU 3 is now offline
[  159.821934] Unregister pv shared memory for cpu 4
[  159.823759] smpboot: CPU 4 is now offline
[  159.848588] Unregister pv shared memory for cpu 5
[  159.850375] smpboot: CPU 5 is now offline
[  159.872907] Unregister pv shared memory for cpu 6
[  159.874598] smpboot: CPU 6 is now offline
[  159.896898] Unregister pv shared memory for cpu 7
[  159.898517] smpboot: CPU 7 is now offline
[  159.916620] PM: Creating hibernation image:
[  159.998033] PM: Need to copy 394338 pages
[  159.998370] PM: Normal pages needed: 394338 + 1024, available pages: 1702516
[1266874520.353525] kvm-clock: cpu 0, msr 2:3ff54001, primary cpu clock, resume
[1266874520.354849] Suspended for 67.457 seconds
[1266874520.354877] Enabling non-boot CPUs ...
[1266874520.366683] x86: Booting SMP configuration:
[1266874520.367028] smpboot: Booting Node 0 Processor 1 APIC 0x1
[1266874520.367514] kvm-clock: cpu 1, msr 2:3ff54041, secondary cpu clock
[1266874520.370107] KVM setup async PF for cpu 1
[1266874520.370425] kvm-stealtime: cpu 1, msr 23fc4d900
[1266874520.370858]  cache: parent cpu1 should not be sleeping
[1266874520.371408] CPU1 is up
[1266874520.386657] smpboot: Booting Node 0 Processor 2 APIC 0x2
[1266874520.387189] kvm-clock: cpu 2, msr 2:3ff54081, secondary cpu clock
[1266874520.389787] KVM setup async PF for cpu 2
[1266874520.390142] kvm-stealtime: cpu 2, msr 23fc8d900
[1266874520.390604]  cache: parent cpu2 should not be sleeping
[1266874520.391178] CPU2 is up
[1266874520.410687] smpboot: Booting Node 0 Processor 3 APIC 0x3
[1266874520.411288] kvm-clock: cpu 3, msr 2:3ff540c1, secondary cpu clock
[1266874520.413851] KVM setup async PF for cpu 3
[1266874520.414162] kvm-stealtime: cpu 3, msr 23fccd900
[1266874520.414566]  cache: parent cpu3 should not be sleeping
[1266874520.415071] CPU3 is up
[1266874520.430924] smpboot: Booting Node 0 Processor 4 APIC 0x4
[1266874520.431459] kvm-clock: cpu 4, msr 2:3ff54101, secondary cpu clock
[1266874520.434048] KVM setup async PF for cpu 4
[1266874520.434381] kvm-stealtime: cpu 4, msr 23fd0d900
[1266874520.434822]  cache: parent cpu4 should not be sleeping
[1266874520.435456] CPU4 is up
[1266874520.454957] smpboot: Booting Node 0 Processor 5 APIC 0x5
[1266874520.455822] kvm-clock: cpu 5, msr 2:3ff54141, secondary cpu clock
[1266874520.458507] KVM setup async PF for cpu 5
[1266874520.458834] kvm-stealtime: cpu 5, msr 23fd4d900
[1266874520.459439]  cache: parent cpu5 should not be sleeping
[1266874520.460320] CPU5 is up
[1266874520.478907] smpboot: Booting Node 0 Processor 6 APIC 0x6
[1266874520.479586] kvm-clock: cpu 6, msr 2:3ff54181, secondary cpu clock
[1266874520.482176] KVM setup async PF for cpu 6
[1266874520.482510] kvm-stealtime: cpu 6, msr 23fd8d900
[1266874520.482936]  cache: parent cpu6 should not be sleeping
[1266874520.483466] CPU6 is up
[1266874520.502988] smpboot: Booting Node 0 Processor 7 APIC 0x7
[1266874520.503775] kvm-clock: cpu 7, msr 2:3ff541c1, secondary cpu clock
[1266874520.506519] KVM setup async PF for cpu 7
[1266874520.506884] kvm-stealtime: cpu 7, msr 23fdcd900
[1266874520.507438]  cache: parent cpu7 should not be sleeping
[1266874520.508141] CPU7 is up
[1266874520.517708] PM: noirq restore of devices complete after 3.294 msecs
[1266874520.518547] PM: early restore of devices complete after 0.129 msecs
[1266874520.553012] rtc_cmos 00:00: System wakeup disabled by ACPI
[1266874520.562260] usb usb2: root hub lost power or was reset
[1266874520.562269] usb usb1: root hub lost power or was reset
[1266874520.563296] usb usb4: root hub lost power or was reset
[1266874520.564993] ------------[ cut here ]------------
[1266874520.564998] WARNING: CPU: 0 PID: 507 at drivers/pci/msi.c:1261 pci_irq_vector+0xb5/0xe0
[1266874520.564998] Modules linked in: fuse(E) ebtable_filter(E) ebtables(E) rpcsec_gss_krb5(E) nfsv4(E) dns_resolver(E) nfs(E) fscache(E) nf_log_ipv6(E) xt_pkttype(E) nf_log_ipv4(E) nf_log_common(E) xt_LOG(E) xt_limit(E) af_packet(E) iscsi_ibft(E) iscsi_boot_sysfs(E) ip6t_REJECT(E) xt_tcpudp(E) nf_conntrack_ipv6(E) nf_defrag_ipv6(E) ip6table_raw(E) ipt_REJECT(E) iptable_raw(E) xt_CT(E) iptable_filter(E) ip6table_mangle(E) nf_conntrack_netbios_ns(E) nf_conntrack_broadcast(E) nf_conntrack_ipv4(E) nf_defrag_ipv4(E) ip_tables(E) xt_conntrack(E) nf_conntrack(E) libcrc32c(E) ip6table_filter(E) ip6_tables(E) x_tables(E) snd_hda_codec_generic(E) snd_hda_intel(E) snd_hda_codec(E) snd_hda_core(E) snd_hwdep(E) joydev(E) snd_pcm(E) snd_timer(E) snd(E) crct10dif_pclmul(E) soundcore(E) crc32_pclmul(E) 8139too(E) ghash_clmulni_intel(E)
[1266874520.565022]  pcbc(E) aesni_intel(E) ppdev(E) i2c_piix4(E) aes_x86_64(E) virtio_balloon(E) crypto_simd(E) parport_pc(E) glue_helper(E) parport(E) button(E) pcspkr(E) cryptd(E) serio_raw(E) acpi_cpufreq(E) nfsd(E) dm_mod(E) auth_rpcgss(E) nfs_acl(E) lockd(E) grace(E) sunrpc(E) ext4(E) crc16(E) jbd2(E) mbcache(E) hid_generic(E) usbhid(E) sr_mod(E) cdrom(E) ata_generic(E) virtio_rng(E) virtio_blk(E) virtio_console(E) ata_piix(E) floppy(E) ehci_pci(E) qxl(E) drm_kms_helper(E) syscopyarea(E) uhci_hcd(E) ahci(E) ehci_hcd(E) sysfillrect(E) crc32c_intel(E) sysimgblt(E) libahci(E) fb_sys_fops(E) ttm(E) virtio_pci(E) virtio_ring(E) usbcore(E) virtio(E) 8139cp(E) drm(E) libata(E) mii(E) sg(E) scsi_mod(E) autofs4(E)
[1266874520.565048] CPU: 0 PID: 507 Comm: kworker/u16:4 Tainted: G        W   E   4.11.0-default #28
[1266874520.565049] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.8.1-0-g4adadbd-20161202_174313-build11a 04/01/2014
[1266874520.565052] Workqueue: events_unbound async_run_entry_fn
[1266874520.565052] Call Trace:
[1266874520.565058]  dump_stack+0x63/0x90
[1266874520.565060]  __warn+0xd1/0xf0
[1266874520.565064]  ? pci_pm_suspend_noirq+0x190/0x190
[1266874520.565065]  warn_slowpath_null+0x1d/0x20
[1266874520.565067]  pci_irq_vector+0xb5/0xe0
[1266874520.565069]  vp_synchronize_vectors+0x46/0x60 [virtio_pci]
[1266874520.565071]  vp_reset+0x37/0x40 [virtio_pci]
[1266874520.565073]  virtio_device_restore+0x22/0x110 [virtio]
[1266874520.565074]  virtio_pci_restore+0x36/0x40 [virtio_pci]
[1266874520.565076]  pci_pm_restore+0x79/0xb0
[1266874520.565078]  dpm_run_callback+0x59/0x180
[1266874520.565079]  device_resume+0xe7/0x210
[1266874520.565080]  ? pm_dev_dbg+0x80/0x80
[1266874520.565082]  async_resume+0x1d/0x50
[1266874520.565083]  async_run_entry_fn+0x39/0x170
[1266874520.565084]  process_one_work+0x16c/0x450
[1266874520.565085]  worker_thread+0x137/0x4e0
[1266874520.565088]  kthread+0x10c/0x140
[1266874520.565089]  ? rescuer_thread+0x3c0/0x3c0
[1266874520.565090]  ? kthread_park+0x90/0x90
[1266874520.565092]  ret_from_fork+0x2c/0x40
[1266874520.565094] ---[ end trace d66daafbe82e66e8 ]---
[1266874520.600698] usb usb3: root hub lost power or was reset
[1266874520.882457] ata2: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
[1266874520.883385] ata5: SATA link down (SStatus 0 SControl 300)
[1266874520.884202] ata4: SATA link down (SStatus 0 SControl 300)
[1266874520.884923] ata6: SATA link down (SStatus 0 SControl 300)
[1266874520.885592] ata3: SATA link down (SStatus 0 SControl 300)
[1266874520.886347] ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
[1266874520.887101] ata1.00: configured for UDMA/100
[1266874520.887835] ata2.00: configured for UDMA/100
[1266874520.946407] usb 3-1: reset high-speed USB device number 2 using ehci-pci
[1266874521.096211] PM: restore of devices complete after 543.539 msecs
[1266874521.097984] PM: Image restored successfully.
[1266874521.099356] PM: Basic memory bitmaps freed
[1266874521.100669] Restarting tasks ... done.