From: Keith Owens <kaos@sgi.com>
To: linux-kernel@vger.kernel.org
cc: ak@suse.de
Subject: Re: NMI problems with Dell SMP Xeons 
In-reply-to: Your message of "Mon, 22 May 2006 19:08:04 +1000."
             <12475.1148288884@kao2.melbourne.sgi.com> 
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Date: Tue, 23 May 2006 15:03:39 +1000
Message-ID: <8303.1148360619@kao2.melbourne.sgi.com>
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Keith Owens (on Mon, 22 May 2006 19:08:04 +1000) wrote:
>Summary: sending an IPI as NMI will reboot a Dell SMP Xeon box.  This
>         looks like a problem with setting up the I/O APICs.

Some more data points, which make this problem even less
understandable.  My previous mail described an i386 build, so I tried
an x86_64 kernel on two boxes that support 64 bit.  Both of them used
flat APIC mode.

Intel M/B, CONFIG_ACPI=y.  Sending IPI 2 without APIC_DM_NMI is
unexpectedly delivered as an NMI, and gets the 'Dazed and confused
message'.  Contrast this with an i386 kernel with CONFIG_ACPI=y on the
same box, where IPI 2 without APIC_DM_NMI is not delivered as NMI,
instead it gets APIC errors.

Dell SC1425 M/B, CONFIG_ACPI=y.  Sending IPI 2 without APIC_DM_NMI is
not delivered at all, but there are no APIC errors.  Contrast this with
an i386 kernel with CONFIG_ACPI=y on the same box, where IPI 2 without
APIC_DM_NMI is also not delivered, but it gets APIC errors.

Dell SC1425 M/B, CONFIG_ACPI=y.  Sending IPI 2 with APIC_DM_NMI is
delivered as NMI, but it does not get the 'Dazed and confused' message.
Contrast this with an i386 kernel with CONFIG_ACPI=y on the same box,
where IPI 2 with APIC_DM_NMI is also delivered as NMI, but with the
'Dazed and confused' message.

Dell SC1425 M/B, CONFIG_ACPI=n.  Sending IPI 2 without APIC_DM_NMI
causes an instant reset.  Contrast this with an i386 kernel with
CONFIG_ACPI=n on the same box, which got APIC errors but no reset,
unless APIC_DM_NMI was set.

i386 vs. x86_64 differences.  Intel M/B vs. Dell M/B differences.
Colour me confused.

Stripped x86_64 .config.

X86_64=y
64BIT=y
X86=y
SEMAPHORE_SLEEPERS=y
MMU=y
RWSEM_GENERIC_SPINLOCK=y
GENERIC_HWEIGHT=y
GENERIC_CALIBRATE_DELAY=y
X86_CMPXCHG=y
EARLY_PRINTK=y
GENERIC_ISA_DMA=y
GENERIC_IOMAP=y
ARCH_MAY_HAVE_PC_FDC=y
DMI=y
EXPERIMENTAL=y
LOCK_KERNEL=y
INIT_ENV_ARG_LIMIT=32
LOCALVERSION="-kaos"
SWAP=y
SYSVIPC=y
SYSCTL=y
RELAY=y
INITRAMFS_SOURCE=""
UID16=y
VM86=y
CC_OPTIMIZE_FOR_SIZE=y
KALLSYMS=y
KALLSYMS_ALL=y
HOTPLUG=y
PRINTK=y
BUG=y
ELF_CORE=y
BASE_FULL=y
FUTEX=y
EPOLL=y
SHMEM=y
SLAB=y
BASE_SMALL=0
MODULES=y
MODULE_UNLOAD=y
MODULE_FORCE_UNLOAD=y
STOP_MACHINE=y
LBD=y
IOSCHED_NOOP=y
DEFAULT_NOOP=y
DEFAULT_IOSCHED="noop"
X86_PC=y
GENERIC_CPU=y
X86_L1_CACHE_BYTES=128
X86_L1_CACHE_SHIFT=7
X86_INTERNODE_CACHE_BYTES=128
X86_TSC=y
X86_GOOD_APIC=y
X86_MSR=y
X86_CPUID=y
X86_HT=y
X86_IO_APIC=y
X86_LOCAL_APIC=y
MTRR=y
SMP=y
SCHED_SMT=y
SCHED_MC=y
PREEMPT=y
PREEMPT_BKL=y
ARCH_SPARSEMEM_ENABLE=y
ARCH_FLATMEM_ENABLE=y
SELECT_MEMORY_MODEL=y
FLATMEM_MANUAL=y
FLATMEM=y
FLAT_NODE_MEM_MAP=y
SPLIT_PTLOCK_CPUS=4
NR_CPUS=8
HPET_TIMER=y
GART_IOMMU=y
SWIOTLB=y
X86_MCE=y
X86_MCE_INTEL=y
X86_MCE_AMD=y
PHYSICAL_START=0x200000
SECCOMP=y
HZ_250=y
HZ=250
GENERIC_HARDIRQS=y
GENERIC_IRQ_PROBE=y
ISA_DMA_API=y
GENERIC_PENDING_IRQ=y
PM=y
ACPI=y
ACPI_AC=y
ACPI_BATTERY=y
ACPI_BUTTON=y
ACPI_VIDEO=y
ACPI_FAN=y
ACPI_PROCESSOR=y
ACPI_THERMAL=y
ACPI_BLACKLIST_YEAR=0
ACPI_EC=y
ACPI_POWER=y
ACPI_SYSTEM=y
X86_PM_TIMER=y
PCI=y
PCI_DIRECT=y
PCI_MSI=y
BINFMT_ELF=y
BINFMT_MISC=y
IA32_EMULATION=y
COMPAT=y
SYSVIPC_COMPAT=y
NET=y
PACKET=y
PACKET_MMAP=y
UNIX=y
INET=y
IP_FIB_HASH=y
SYN_COOKIES=y
INET_DIAG=y
INET_TCP_DIAG=y
TCP_CONG_BIC=y
NETFILTER=y
NETFILTER_NETLINK=y
NETFILTER_XTABLES=y
NETFILTER_XT_TARGET_CLASSIFY=y
NETFILTER_XT_TARGET_MARK=y
NETFILTER_XT_TARGET_NFQUEUE=y
NETFILTER_XT_TARGET_NOTRACK=y
NETFILTER_XT_MATCH_COMMENT=y
NETFILTER_XT_MATCH_CONNTRACK=y
NETFILTER_XT_MATCH_DCCP=y
NETFILTER_XT_MATCH_HELPER=y
NETFILTER_XT_MATCH_LENGTH=y
NETFILTER_XT_MATCH_LIMIT=y
NETFILTER_XT_MATCH_MAC=y
NETFILTER_XT_MATCH_MARK=y
NETFILTER_XT_MATCH_PKTTYPE=y
NETFILTER_XT_MATCH_REALM=y
NETFILTER_XT_MATCH_SCTP=y
NETFILTER_XT_MATCH_STATE=y
NETFILTER_XT_MATCH_STRING=y
NETFILTER_XT_MATCH_TCPMSS=y
IP_NF_CONNTRACK=y
IP_NF_CONNTRACK_NETLINK=y
IP_NF_FTP=y
IP_NF_IRC=y
IP_NF_QUEUE=y
IP_NF_IPTABLES=y
IP_NF_MATCH_IPRANGE=y
IP_NF_MATCH_TOS=y
IP_NF_MATCH_RECENT=y
IP_NF_MATCH_ECN=y
IP_NF_MATCH_DSCP=y
IP_NF_MATCH_TTL=y
IP_NF_MATCH_OWNER=y
IP_NF_MATCH_ADDRTYPE=y
IP_NF_MATCH_HASHLIMIT=y
IP_NF_FILTER=y
IP_NF_TARGET_REJECT=y
IP_NF_TARGET_LOG=y
IP_NF_TARGET_ULOG=y
IP_NF_TARGET_TCPMSS=y
IP_NF_NAT=y
IP_NF_NAT_NEEDED=y
IP_NF_TARGET_MASQUERADE=y
IP_NF_TARGET_REDIRECT=y
IP_NF_TARGET_NETMAP=y
IP_NF_TARGET_SAME=y
IP_NF_NAT_SNMP_BASIC=y
IP_NF_NAT_IRC=y
IP_NF_NAT_FTP=y
IP_NF_MANGLE=y
IP_NF_TARGET_TOS=y
IP_NF_TARGET_ECN=y
IP_NF_TARGET_DSCP=y
IP_NF_TARGET_TTL=y
IP_NF_RAW=y
IP_NF_ARPTABLES=y
IP_NF_ARPFILTER=y
IP_NF_ARP_MANGLE=y
NET_CLS_ROUTE=y
STANDALONE=y
PREVENT_FIRMWARE_BUILD=y
PARPORT=y
PARPORT_PC=y
BLK_DEV_FD=y
BLK_DEV_LOOP=y
BLK_DEV_RAM=y
BLK_DEV_RAM_COUNT=16
BLK_DEV_RAM_SIZE=4096
IDE=y
BLK_DEV_IDE=y
BLK_DEV_IDEDISK=y
IDEDISK_MULTI_MODE=y
BLK_DEV_IDECD=y
BLK_DEV_IDESCSI=y
IDE_GENERIC=y
BLK_DEV_IDEPCI=y
IDEPCI_SHARE_IRQ=y
BLK_DEV_GENERIC=y
BLK_DEV_IDEDMA_PCI=y
IDEDMA_PCI_AUTO=y
BLK_DEV_PIIX=y
BLK_DEV_IDEDMA=y
IDEDMA_AUTO=y
SCSI=y
SCSI_PROC_FS=y
BLK_DEV_SD=y
BLK_DEV_SR=y
BLK_DEV_SR_VENDOR=y
CHR_DEV_SG=y
SCSI_CONSTANTS=y
SCSI_LOGGING=y
SCSI_SATA=y
SCSI_ATA_PIIX=y
SCSI_SATA_INTEL_COMBINED=y
MD=y
BLK_DEV_MD=y
MD_LINEAR=y
MD_RAID0=y
MD_RAID1=y
MD_RAID10=y
MD_RAID5=y
MD_RAID6=y
MD_MULTIPATH=y
BLK_DEV_DM=y
DM_CRYPT=y
DM_SNAPSHOT=y
DM_MIRROR=y
DM_ZERO=y
NETDEVICES=y
DUMMY=y
TUN=y
NET_ETHERNET=y
MII=y
NET_PCI=y
E100=y
E1000=y
TIGON3=y
PPP=y
PPP_ASYNC=y
PPP_DEFLATE=y
PPP_BSDCOMP=y
INPUT=y
INPUT_MOUSEDEV=y
INPUT_MOUSEDEV_PSAUX=y
INPUT_MOUSEDEV_SCREEN_X=1024
INPUT_MOUSEDEV_SCREEN_Y=768
INPUT_KEYBOARD=y
KEYBOARD_ATKBD=y
INPUT_MOUSE=y
MOUSE_PS2=y
MOUSE_SERIAL=y
SERIO=y
SERIO_I8042=y
SERIO_SERPORT=y
SERIO_PCIPS2=y
SERIO_LIBPS2=y
VT=y
VT_CONSOLE=y
HW_CONSOLE=y
SERIAL_8250=y
SERIAL_8250_CONSOLE=y
SERIAL_8250_PCI=y
SERIAL_8250_NR_UARTS=4
SERIAL_8250_RUNTIME_UARTS=4
SERIAL_8250_EXTENDED=y
SERIAL_CORE=y
SERIAL_CORE_CONSOLE=y
UNIX98_PTYS=y
LEGACY_PTYS=y
LEGACY_PTY_COUNT=256
PRINTER=y
RTC=y
AGP=y
AGP_AMD64=y
AGP_INTEL=y
HWMON=y
VGA_CONSOLE=y
DUMMY_CONSOLE=y
USB_ARCH_HAS_HCD=y
USB_ARCH_HAS_OHCI=y
USB_ARCH_HAS_EHCI=y
EDAC=y
EDAC_DEBUG=y
EDAC_MM_EDAC=y
EDAC_E752X=y
EDAC_POLL=y
EXT2_FS=y
FS_POSIX_ACL=y
XFS_FS=y
XFS_EXPORT=y
XFS_QUOTA=y
ROMFS_FS=y
INOTIFY=y
QUOTACTL=y
DNOTIFY=y
AUTOFS_FS=y
AUTOFS4_FS=y
FUSE_FS=y
ISO9660_FS=y
JOLIET=y
ZISOFS=y
ZISOFS_FS=y
UDF_FS=y
UDF_NLS=y
FAT_FS=y
MSDOS_FS=y
VFAT_FS=y
FAT_DEFAULT_CODEPAGE=437
FAT_DEFAULT_IOCHARSET="iso8859-1"
NTFS_FS=y
PROC_FS=y
PROC_KCORE=y
SYSFS=y
TMPFS=y
RAMFS=y
EFS_FS=y
HPFS_FS=y
UFS_FS=y
NFS_FS=y
NFS_V3=y
NFS_V4=y
NFSD=y
NFSD_V3=y
NFSD_V4=y
NFSD_TCP=y
LOCKD=y
LOCKD_V4=y
EXPORTFS=y
NFS_COMMON=y
SUNRPC=y
SUNRPC_GSS=y
RPCSEC_GSS_KRB5=y
SMB_FS=y
MSDOS_PARTITION=y
NLS=y
NLS_DEFAULT="iso8859-1"
NLS_CODEPAGE_437=y
NLS_CODEPAGE_850=y
NLS_ISO8859_1=y
NLS_UTF8=y
MAGIC_SYSRQ=y
DEBUG_KERNEL=y
LOG_BUF_SHIFT=16
DEBUG_PREEMPT=y
DEBUG_MUTEXES=y
DEBUG_INFO=y
DEBUG_FS=y
FRAME_POINTER=y
FORCED_INLINING=y
DEBUG_RODATA=y
CRYPTO=y
CRYPTO_MD5=y
CRYPTO_DES=y
CRYPTO_AES_X86_64=y
CRC_CCITT=y
CRC32=y
ZLIB_INFLATE=y
ZLIB_DEFLATE=y
TEXTSEARCH=y
TEXTSEARCH_KMP=y
TEXTSEARCH_BM=y
TEXTSEARCH_FSM=y

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