[Xen-users] CPU stall in RCU system

[Matthias <matthias.kannenberg@xxxxxxxxxxxxxx>]

Hi everybody,

I came across an error which causes my dom0 to freeze:


INFO: rcu_preempt self-detected stall on CPU { 0} (t=60005 jiffies)
INFO: rcu_preempt detected stalls on CPUs/tasks: { 0} (detected by 1,
t=60007 jiffies)
sending NMI to all CPUs:
xen: vector 0x2 is not implemented


This happens randomly 2-5 minutes after booting the dom0 and might be
triggered through network usage (e.g. using ssh ).

The strange thing is that in vanilla kernel 3.7.4, this happens with
one config, but not with an other one (which has slightly more modules
due to trying to fix an other problem). I pasted a diff at the end of
this post. When using vanilla kernel 3.7.6, this happens also when
using the previously working config.

I'm using latest xen-unstable with a AMD Phenom 1090T (I know that at
some point xen frequency scaling had problems with x15 family AMD
CPUs, so I'm saying this here..

Any ideas what might causes this?



 diff .config_error .config_working
62,63c62,63
< CONFIG_KERNEL_GZIP=y
< # CONFIG_KERNEL_BZIP2 is not set
---
> # CONFIG_KERNEL_GZIP is not set
> CONFIG_KERNEL_BZIP2=y
343c343
< CONFIG_KVM_GUEST=y
---
> # CONFIG_KVM_GUEST is not set
390c390
< CONFIG_X86_MCE_INTEL=y
---
> # CONFIG_X86_MCE_INTEL is not set
394d393
< CONFIG_X86_THERMAL_VECTOR=y
444,445c443
< CONFIG_X86_CHECK_BIOS_CORRUPTION=y
< # CONFIG_X86_BOOTPARAM_MEMORY_CORRUPTION_CHECK is not set
---
> # CONFIG_X86_CHECK_BIOS_CORRUPTION is not set
518c516
< CONFIG_ACPI_CUSTOM_METHOD=y
---
> # CONFIG_ACPI_CUSTOM_METHOD is not set
548,549c546,547
< CONFIG_X86_PCC_CPUFREQ=y
< CONFIG_X86_ACPI_CPUFREQ=y
---
> CONFIG_X86_PCC_CPUFREQ=m
> CONFIG_X86_ACPI_CPUFREQ=m
551,553c549,551
< CONFIG_X86_POWERNOW_K8=y
< CONFIG_X86_SPEEDSTEP_CENTRINO=y
< CONFIG_X86_P4_CLOCKMOD=y
---
> CONFIG_X86_POWERNOW_K8=m
> # CONFIG_X86_SPEEDSTEP_CENTRINO is not set
> # CONFIG_X86_P4_CLOCKMOD is not set
558c556
< CONFIG_X86_SPEEDSTEP_LIB=y
---
> # CONFIG_X86_SPEEDSTEP_LIB is not set
827c825
< CONFIG_NETFILTER_XT_TARGET_HMARK=m
---
> # CONFIG_NETFILTER_XT_TARGET_HMARK is not set
1360d1357
< # CONFIG_NET_9P_VIRTIO is not set
1573c1570
< CONFIG_PARPORT_SERIAL=m
---
> # CONFIG_PARPORT_SERIAL is not set
1645d1641
< CONFIG_VIRTIO_BLK=y
1734c1730
< CONFIG_SCSI_ENCLOSURE=m
---
> # CONFIG_SCSI_ENCLOSURE is not set
1801d1796
< CONFIG_HYPERV_STORAGE=y
1843d1837
< CONFIG_SCSI_VIRTIO=y
1978c1972
< CONFIG_DM_LOG_USERSPACE=y
---
> # CONFIG_DM_LOG_USERSPACE is not set
2032c2026
< CONFIG_NET_TEAM_MODE_BROADCAST=m
---
> # CONFIG_NET_TEAM_MODE_BROADCAST is not set
2035c2029
< CONFIG_NET_TEAM_MODE_LOADBALANCE=m
---
> # CONFIG_NET_TEAM_MODE_LOADBALANCE is not set
2038c2032
< CONFIG_VXLAN=y
---
> CONFIG_VXLAN=m
2049d2042
< # CONFIG_VIRTIO_NET is not set
2310c2303
< CONFIG_MARVELL_PHY=y
---
> CONFIG_MARVELL_PHY=m
2597d2589
< # CONFIG_HYPERV_NET is not set
3013d3004
< # CONFIG_VIRTIO_CONSOLE is not set
3026d3016
< # CONFIG_HW_RANDOM_VIRTIO is not set
3286d3275
< # CONFIG_CHARGER_ISP1704 is not set
3825,3826c3814
< CONFIG_DRM_VMWGFX=y
< # CONFIG_DRM_VMWGFX_FBCON is not set
---
> # CONFIG_DRM_VMWGFX is not set
4177c4165
< CONFIG_UHID=y
---
> # CONFIG_UHID is not set
4240d4227
< # CONFIG_HID_HYPERV_MOUSE is not set
4310c4297
< CONFIG_USB_HCD_BCMA=m
---
> # CONFIG_USB_HCD_BCMA is not set
4312,4314c4299
< CONFIG_USB_CHIPIDEA=y
< # CONFIG_USB_CHIPIDEA_HOST is not set
< # CONFIG_USB_CHIPIDEA_DEBUG is not set
---
> # CONFIG_USB_CHIPIDEA is not set
4457,4458c4442,4443
< CONFIG_OMAP_USB2=y
< CONFIG_USB_ISP1301=y
---
> # CONFIG_OMAP_USB2 is not set
> # CONFIG_USB_ISP1301 is not set
4469d4453
< CONFIG_USB_OTG_UTILS=y
4607d4590
< CONFIG_EDAC_I7CORE=m
4611d4593
< CONFIG_EDAC_SBRIDGE=m
4712c4694
< CONFIG_UIO=y
---
> CONFIG_UIO=m
4721d4702
< CONFIG_VIRTIO=y
4726,4729c4707,4708
< CONFIG_VIRTIO_PCI=y
< # CONFIG_VIRTIO_BALLOON is not set
< CONFIG_VIRTIO_MMIO=y
< CONFIG_VIRTIO_MMIO_CMDLINE_DEVICES=y
---
> # CONFIG_VIRTIO_PCI is not set
> # CONFIG_VIRTIO_MMIO is not set
4734,4735c4713
< CONFIG_HYPERV=y
< CONFIG_HYPERV_UTILS=y
---
> # CONFIG_HYPERV is not set
4983c4961
< CONFIG_DELL_RBU=y
---
> CONFIG_DELL_RBU=m
4986c4964
< CONFIG_DMI_SYSFS=y
---
> CONFIG_DMI_SYSFS=m
4989,4995c4967
< CONFIG_GOOGLE_FIRMWARE=y
<
< #
< # Google Firmware Drivers
< #
< CONFIG_GOOGLE_SMI=y
< CONFIG_GOOGLE_MEMCONSOLE=y
---
> # CONFIG_GOOGLE_FIRMWARE is not set
5649c5621
< CONFIG_KVM_INTEL=y
---
> # CONFIG_KVM_INTEL is not set
5653c5625
< CONFIG_TCM_VHOST=m
---
> # CONFIG_TCM_VHOST is not set
5720c5692
< CONFIG_DDR=y
---
> # CONFIG_DDR is not set

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