[Xen-devel] RE: 32bit dom0 is hanging with changesset 6290

["Ian Pratt" <m+Ian.Pratt@xxxxxxxxxxxx>]

> I am hitting this issue because I enabled SMP for dom0 (found 
> it is not working) and disabled it again.
> By doing so, the config file for dom0 kernel got changed like 
> this. And I started seeing the hang.

Probably a Config file bug. Please can you try and investigate.
 
> --- config.default      2005-08-19 23:04:51.560459168 -0700
> +++ config.issue        2005-08-19 23:03:57.054745296 -0700
> @@ -1,7 +1,7 @@
>  #
>  # Automatically generated make config: don't edit
>  # Linux kernel version: 2.6.12-xen0
> -# Wed Aug  3 09:54:56 2005
> +# Fri Aug 19 22:58:21 2005
>  #
>  CONFIG_XEN=y
>  CONFIG_ARCH_XEN=y
> @@ -143,14 +143,11 @@
>  CONFIG_MTRR=y
>  CONFIG_HAVE_DEC_LOCK=y
>  # CONFIG_REGPARM is not set
> -CONFIG_X86_LOCAL_APIC=y
> -CONFIG_X86_IO_APIC=y

The above two need to be set for a dom0 kernel.

>  #
>  # Bus options (PCI, PCMCIA, EISA, MCA, ISA)
>  #
> -CONFIG_X86_UP_APIC=y
> -CONFIG_X86_UP_IOAPIC=y

These two are not Xen x86 option. Are you sure you didn't forget to
specify ARCH=xen at some point?

> +# CONFIG_X86_UP_APIC is not set
>  CONFIG_PCI=y
>  # CONFIG_PCI_GOBIOS is not set
>  # CONFIG_PCI_GOMMCONFIG is not set
> @@ -160,7 +157,6 @@
>  CONFIG_PCI_DIRECT=y
>  CONFIG_PCI_MMCONFIG=y
>  # CONFIG_PCIEPORTBUS is not set
> -# CONFIG_PCI_MSI is not set
>  CONFIG_PCI_LEGACY_PROC=y
>  # CONFIG_PCI_NAMES is not set
>  # CONFIG_PCI_DEBUG is not set
> @@ -541,7 +537,7 @@
>  # CONFIG_IP_NF_MATCH_STATE is not set
>  # CONFIG_IP_NF_MATCH_CONNTRACK is not set
>  # CONFIG_IP_NF_MATCH_OWNER is not set
> -CONFIG_IP_NF_MATCH_PHYSDEV=y
> +CONFIG_IP_NF_MATCH_PHYSDEV=m
>  # CONFIG_IP_NF_MATCH_ADDRTYPE is not set
>  # CONFIG_IP_NF_MATCH_REALM is not set
>  # CONFIG_IP_NF_MATCH_SCTP is not set
> @@ -1275,5 +1271,3 @@
>  # CONFIG_DEBUG_STACK_USAGE is not set
>  # CONFIG_DEBUG_PAGEALLOC is not set
>  # CONFIG_4KSTACKS is not set
> -CONFIG_X86_FIND_SMP_CONFIG=y
> -CONFIG_X86_MPPARSE=y

These two must be set also.

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