[uml-devel] uml_mconsole issue

[uml-devel] uml_mconsole issue

[Anthony Brock]

[-- Attachment #1: Type: text/plain, Size: 909 bytes --]

I've been writing some scripts to probe my UML instances for simple
statistics. However, after a few probes my UML instances crash.
Specifically, I am issuing commands such as:

$ uml_mconsole bind2 proc uptime
OK 190.57 162.44

$

About 4 out of 5 times, this will perform successfully. However, this will
occasionally return successfully (with the correct uptime) BUT the UML
instance will no longer be running. The exit appears the be totally silent
(no error messages, no warning and no running linux processes).

My setup is as follows:


Host:
SuSE 9.1 Professional 32-Bit, 2.6.4-54.5-smp (stock kernel with SKAS mode
enabled)

Guest:
Image: SuSE 9.0 Professional
Kernel: linux-2.6.7 with uml-patch-2.6.7-01 and uml-linux-2.6.7-01-bb1.patch
applied.
Config: See attached


Let me know if you require more detail and what specific steps I should take
to help trouble-shoot this. Thanks in advance!

Tony

[-- Attachment #2: 2.6.7-um-config --]
[-- Type: application/octet-stream, Size: 15862 bytes --]

#
# Automatically generated make config: don't edit
#
CONFIG_USERMODE=y
CONFIG_MMU=y
CONFIG_UID16=y
CONFIG_RWSEM_GENERIC_SPINLOCK=y

#
# UML-specific options
#
CONFIG_MODE_TT=y
CONFIG_MODE_SKAS=y
CONFIG_NET=y
CONFIG_BINFMT_ELF=y
CONFIG_BINFMT_MISC=m
CONFIG_HOSTFS=m
# CONFIG_HPPFS is not set
CONFIG_MCONSOLE=y
# CONFIG_MAGIC_SYSRQ is not set
# CONFIG_HOST_2G_2G is not set
# CONFIG_UML_SMP is not set
# CONFIG_SMP is not set
CONFIG_NEST_LEVEL=0
CONFIG_KERNEL_HALF_GIGS=1
# CONFIG_HIGHMEM is not set
CONFIG_PROC_MM=y
CONFIG_KERNEL_STACK_ORDER=2
CONFIG_UML_REAL_TIME_CLOCK=y

#
# Code maturity level options
#
CONFIG_EXPERIMENTAL=y
CONFIG_CLEAN_COMPILE=y
# CONFIG_STANDALONE is not set
CONFIG_BROKEN_ON_SMP=y

#
# General setup
#
CONFIG_SWAP=y
CONFIG_SYSVIPC=y
CONFIG_POSIX_MQUEUE=y
CONFIG_BSD_PROCESS_ACCT=y
CONFIG_SYSCTL=y
# CONFIG_AUDIT is not set
CONFIG_LOG_BUF_SHIFT=14
CONFIG_HOTPLUG=y
CONFIG_IKCONFIG=y
CONFIG_IKCONFIG_PROC=y
# CONFIG_EMBEDDED is not set
CONFIG_KALLSYMS=y
CONFIG_FUTEX=y
CONFIG_EPOLL=y
CONFIG_IOSCHED_NOOP=y
CONFIG_IOSCHED_AS=y
CONFIG_IOSCHED_DEADLINE=y
CONFIG_IOSCHED_CFQ=y
# CONFIG_CC_OPTIMIZE_FOR_SIZE is not set

#
# Loadable module support
#
CONFIG_MODULES=y
CONFIG_MODULE_UNLOAD=y
CONFIG_MODULE_FORCE_UNLOAD=y
CONFIG_OBSOLETE_MODPARM=y
CONFIG_MODVERSIONS=y
CONFIG_KMOD=y

#
# Generic Driver Options
#
CONFIG_FW_LOADER=m

#
# Character Devices
#
CONFIG_STDIO_CONSOLE=y
CONFIG_SSL=y
CONFIG_FD_CHAN=y
CONFIG_NULL_CHAN=y
CONFIG_PORT_CHAN=y
CONFIG_PTY_CHAN=y
CONFIG_TTY_CHAN=y
CONFIG_XTERM_CHAN=y
CONFIG_CON_ZERO_CHAN="fd:0,fd:1"
CONFIG_CON_CHAN="xterm"
CONFIG_SSL_CHAN="pty"
CONFIG_UNIX98_PTYS=y
CONFIG_LEGACY_PTYS=y
CONFIG_LEGACY_PTY_COUNT=256
CONFIG_WATCHDOG=y
# CONFIG_WATCHDOG_NOWAYOUT is not set
CONFIG_SOFT_WATCHDOG=m
CONFIG_UML_WATCHDOG=m
# CONFIG_UML_SOUND is not set
# CONFIG_SOUND is not set
# CONFIG_HOSTAUDIO is not set

#
# Block Devices
#
CONFIG_BLK_DEV_UBD=y
CONFIG_BLK_DEV_UBD_SYNC=y
CONFIG_BLK_DEV_COW_COMMON=y
CONFIG_BLK_DEV_LOOP=y
CONFIG_BLK_DEV_NBD=m
CONFIG_BLK_DEV_RAM=y
CONFIG_BLK_DEV_RAM_SIZE=64000
CONFIG_BLK_DEV_INITRD=y
# CONFIG_MMAPPER is not set
CONFIG_NETDEVICES=y

#
# UML Network Devices
#
CONFIG_UML_NET=y
# CONFIG_UML_NET_ETHERTAP is not set
CONFIG_UML_NET_TUNTAP=y
# CONFIG_UML_NET_SLIP is not set
# CONFIG_UML_NET_DAEMON is not set
# CONFIG_UML_NET_MCAST is not set
# CONFIG_UML_NET_PCAP is not set
# CONFIG_UML_NET_SLIRP is not set

#
# Networking support
#

#
# Networking options
#
CONFIG_PACKET=m
CONFIG_PACKET_MMAP=y
CONFIG_NETLINK_DEV=m
CONFIG_UNIX=y
CONFIG_NET_KEY=m
CONFIG_INET=y
CONFIG_IP_MULTICAST=y
CONFIG_IP_ADVANCED_ROUTER=y
CONFIG_IP_MULTIPLE_TABLES=y
CONFIG_IP_ROUTE_FWMARK=y
CONFIG_IP_ROUTE_NAT=y
CONFIG_IP_ROUTE_MULTIPATH=y
CONFIG_IP_ROUTE_TOS=y
CONFIG_IP_ROUTE_VERBOSE=y
# CONFIG_IP_PNP is not set
CONFIG_NET_IPIP=m
CONFIG_NET_IPGRE=m
CONFIG_NET_IPGRE_BROADCAST=y
CONFIG_IP_MROUTE=y
CONFIG_IP_PIMSM_V1=y
CONFIG_IP_PIMSM_V2=y
# CONFIG_ARPD is not set
CONFIG_SYN_COOKIES=y
CONFIG_INET_AH=m
CONFIG_INET_ESP=m
CONFIG_INET_IPCOMP=m

#
# IP: Virtual Server Configuration
#
CONFIG_IP_VS=m
# CONFIG_IP_VS_DEBUG is not set
CONFIG_IP_VS_TAB_BITS=12

#
# IPVS transport protocol load balancing support
#
CONFIG_IP_VS_PROTO_TCP=y
CONFIG_IP_VS_PROTO_UDP=y
CONFIG_IP_VS_PROTO_ESP=y
CONFIG_IP_VS_PROTO_AH=y

#
# IPVS scheduler
#
CONFIG_IP_VS_RR=m
CONFIG_IP_VS_WRR=m
CONFIG_IP_VS_LC=m
CONFIG_IP_VS_WLC=m
CONFIG_IP_VS_LBLC=m
CONFIG_IP_VS_LBLCR=m
CONFIG_IP_VS_DH=m
CONFIG_IP_VS_SH=m
CONFIG_IP_VS_SED=m
CONFIG_IP_VS_NQ=m

#
# IPVS application helper
#
CONFIG_IP_VS_FTP=m
CONFIG_IPV6=m
CONFIG_IPV6_PRIVACY=y
CONFIG_INET6_AH=m
CONFIG_INET6_ESP=m
CONFIG_INET6_IPCOMP=m
CONFIG_IPV6_TUNNEL=m
CONFIG_NETFILTER=y
# CONFIG_NETFILTER_DEBUG is not set
CONFIG_BRIDGE_NETFILTER=y

#
# IP: Netfilter Configuration
#
CONFIG_IP_NF_CONNTRACK=m
CONFIG_IP_NF_FTP=m
CONFIG_IP_NF_IRC=m
CONFIG_IP_NF_TFTP=m
CONFIG_IP_NF_AMANDA=m
CONFIG_IP_NF_QUEUE=m
CONFIG_IP_NF_IPTABLES=m
CONFIG_IP_NF_MATCH_LIMIT=m
CONFIG_IP_NF_MATCH_IPRANGE=m
CONFIG_IP_NF_MATCH_MAC=m
CONFIG_IP_NF_MATCH_PKTTYPE=m
CONFIG_IP_NF_MATCH_MARK=m
CONFIG_IP_NF_MATCH_MULTIPORT=m
CONFIG_IP_NF_MATCH_TOS=m
CONFIG_IP_NF_MATCH_RECENT=m
CONFIG_IP_NF_MATCH_ECN=m
CONFIG_IP_NF_MATCH_DSCP=m
CONFIG_IP_NF_MATCH_AH_ESP=m
CONFIG_IP_NF_MATCH_LENGTH=m
CONFIG_IP_NF_MATCH_TTL=m
CONFIG_IP_NF_MATCH_TCPMSS=m
CONFIG_IP_NF_MATCH_HELPER=m
CONFIG_IP_NF_MATCH_STATE=m
CONFIG_IP_NF_MATCH_CONNTRACK=m
CONFIG_IP_NF_MATCH_OWNER=m
CONFIG_IP_NF_MATCH_PHYSDEV=m
CONFIG_IP_NF_FILTER=m
CONFIG_IP_NF_TARGET_REJECT=m
CONFIG_IP_NF_NAT=m
CONFIG_IP_NF_NAT_NEEDED=y
CONFIG_IP_NF_TARGET_MASQUERADE=m
CONFIG_IP_NF_TARGET_REDIRECT=m
CONFIG_IP_NF_TARGET_NETMAP=m
CONFIG_IP_NF_TARGET_SAME=m
# CONFIG_IP_NF_NAT_LOCAL is not set
CONFIG_IP_NF_NAT_SNMP_BASIC=m
CONFIG_IP_NF_NAT_IRC=m
CONFIG_IP_NF_NAT_FTP=m
CONFIG_IP_NF_NAT_TFTP=m
CONFIG_IP_NF_NAT_AMANDA=m
CONFIG_IP_NF_MANGLE=m
CONFIG_IP_NF_TARGET_TOS=m
CONFIG_IP_NF_TARGET_ECN=m
CONFIG_IP_NF_TARGET_DSCP=m
CONFIG_IP_NF_TARGET_MARK=m
CONFIG_IP_NF_TARGET_CLASSIFY=m
CONFIG_IP_NF_TARGET_LOG=m
CONFIG_IP_NF_TARGET_ULOG=m
CONFIG_IP_NF_TARGET_TCPMSS=m
CONFIG_IP_NF_ARPTABLES=m
CONFIG_IP_NF_ARPFILTER=m
CONFIG_IP_NF_ARP_MANGLE=m
CONFIG_IP_NF_COMPAT_IPCHAINS=m
CONFIG_IP_NF_COMPAT_IPFWADM=m
# CONFIG_IP_NF_RAW is not set

#
# IPv6: Netfilter Configuration
#
CONFIG_IP6_NF_QUEUE=m
CONFIG_IP6_NF_IPTABLES=m
CONFIG_IP6_NF_MATCH_LIMIT=m
CONFIG_IP6_NF_MATCH_MAC=m
CONFIG_IP6_NF_MATCH_RT=m
CONFIG_IP6_NF_MATCH_OPTS=m
CONFIG_IP6_NF_MATCH_FRAG=m
CONFIG_IP6_NF_MATCH_HL=m
CONFIG_IP6_NF_MATCH_MULTIPORT=m
CONFIG_IP6_NF_MATCH_OWNER=m
CONFIG_IP6_NF_MATCH_MARK=m
CONFIG_IP6_NF_MATCH_IPV6HEADER=m
CONFIG_IP6_NF_MATCH_AHESP=m
CONFIG_IP6_NF_MATCH_LENGTH=m
CONFIG_IP6_NF_MATCH_EUI64=m
CONFIG_IP6_NF_FILTER=m
CONFIG_IP6_NF_TARGET_LOG=m
CONFIG_IP6_NF_MANGLE=m
CONFIG_IP6_NF_TARGET_MARK=m
# CONFIG_IP6_NF_RAW is not set

#
# DECnet: Netfilter Configuration
#
CONFIG_DECNET_NF_GRABULATOR=m

#
# Bridge: Netfilter Configuration
#
CONFIG_BRIDGE_NF_EBTABLES=m
CONFIG_BRIDGE_EBT_BROUTE=m
CONFIG_BRIDGE_EBT_T_FILTER=m
CONFIG_BRIDGE_EBT_T_NAT=m
CONFIG_BRIDGE_EBT_802_3=m
CONFIG_BRIDGE_EBT_AMONG=m
CONFIG_BRIDGE_EBT_ARP=m
CONFIG_BRIDGE_EBT_IP=m
CONFIG_BRIDGE_EBT_LIMIT=m
CONFIG_BRIDGE_EBT_MARK=m
CONFIG_BRIDGE_EBT_PKTTYPE=m
CONFIG_BRIDGE_EBT_STP=m
CONFIG_BRIDGE_EBT_VLAN=m
CONFIG_BRIDGE_EBT_ARPREPLY=m
CONFIG_BRIDGE_EBT_DNAT=m
CONFIG_BRIDGE_EBT_MARK_T=m
CONFIG_BRIDGE_EBT_REDIRECT=m
CONFIG_BRIDGE_EBT_SNAT=m
CONFIG_BRIDGE_EBT_LOG=m
CONFIG_XFRM=y
CONFIG_XFRM_USER=m

#
# SCTP Configuration (EXPERIMENTAL)
#
CONFIG_IP_SCTP=m
# CONFIG_SCTP_DBG_MSG is not set
# CONFIG_SCTP_DBG_OBJCNT is not set
# CONFIG_SCTP_HMAC_NONE is not set
# CONFIG_SCTP_HMAC_SHA1 is not set
CONFIG_SCTP_HMAC_MD5=y
CONFIG_ATM=y
CONFIG_ATM_CLIP=y
CONFIG_ATM_CLIP_NO_ICMP=y
CONFIG_ATM_LANE=m
CONFIG_ATM_MPOA=m
CONFIG_ATM_BR2684=m
# CONFIG_ATM_BR2684_IPFILTER is not set
CONFIG_BRIDGE=m
CONFIG_VLAN_8021Q=m
CONFIG_DECNET=m
CONFIG_DECNET_SIOCGIFCONF=y
# CONFIG_DECNET_ROUTER is not set
CONFIG_LLC=m
CONFIG_LLC2=m
CONFIG_IPX=m
# CONFIG_IPX_INTERN is not set
CONFIG_ATALK=m
CONFIG_DEV_APPLETALK=y
CONFIG_IPDDP=m
CONFIG_IPDDP_ENCAP=y
CONFIG_IPDDP_DECAP=y
CONFIG_X25=m
CONFIG_LAPB=m
# CONFIG_NET_DIVERT is not set
CONFIG_ECONET=m
# CONFIG_ECONET_AUNUDP is not set
# CONFIG_ECONET_NATIVE is not set
CONFIG_WAN_ROUTER=m
# CONFIG_NET_FASTROUTE is not set
# CONFIG_NET_HW_FLOWCONTROL is not set

#
# QoS and/or fair queueing
#
CONFIG_NET_SCHED=y
CONFIG_NET_SCH_CBQ=m
CONFIG_NET_SCH_HTB=m
CONFIG_NET_SCH_HFSC=m
CONFIG_NET_SCH_CSZ=m
CONFIG_NET_SCH_ATM=y
CONFIG_NET_SCH_PRIO=m
CONFIG_NET_SCH_RED=m
CONFIG_NET_SCH_SFQ=m
CONFIG_NET_SCH_TEQL=m
CONFIG_NET_SCH_TBF=m
CONFIG_NET_SCH_GRED=m
CONFIG_NET_SCH_DSMARK=m
CONFIG_NET_SCH_DELAY=m
CONFIG_NET_SCH_INGRESS=m
CONFIG_NET_QOS=y
CONFIG_NET_ESTIMATOR=y
CONFIG_NET_CLS=y
CONFIG_NET_CLS_TCINDEX=m
CONFIG_NET_CLS_ROUTE4=m
CONFIG_NET_CLS_ROUTE=y
CONFIG_NET_CLS_FW=m
CONFIG_NET_CLS_U32=m
CONFIG_NET_CLS_RSVP=m
CONFIG_NET_CLS_RSVP6=m
CONFIG_NET_CLS_POLICE=y

#
# Network testing
#
CONFIG_NET_PKTGEN=m
CONFIG_NETPOLL=y
CONFIG_NETPOLL_RX=y
CONFIG_NETPOLL_TRAP=y
CONFIG_NET_POLL_CONTROLLER=y
CONFIG_HAMRADIO=y

#
# Packet Radio protocols
#
CONFIG_AX25=m
CONFIG_AX25_DAMA_SLAVE=y
CONFIG_NETROM=m
CONFIG_ROSE=m

#
# AX.25 network device drivers
#
# CONFIG_MKISS is not set
# CONFIG_6PACK is not set
CONFIG_BPQETHER=m
CONFIG_BAYCOM_SER_FDX=m
CONFIG_BAYCOM_SER_HDX=m
CONFIG_YAM=m
# CONFIG_IRDA is not set
CONFIG_BT=m
CONFIG_BT_L2CAP=m
CONFIG_BT_SCO=m
CONFIG_BT_RFCOMM=m
CONFIG_BT_RFCOMM_TTY=y
CONFIG_BT_BNEP=m
CONFIG_BT_BNEP_MC_FILTER=y
CONFIG_BT_BNEP_PROTO_FILTER=y

#
# Bluetooth device drivers
#
CONFIG_BT_HCIUART=m
CONFIG_BT_HCIUART_H4=y
CONFIG_BT_HCIUART_BCSP=y
CONFIG_BT_HCIUART_BCSP_TXCRC=y
CONFIG_BT_HCIVHCI=m
CONFIG_DUMMY=m
CONFIG_BONDING=m
CONFIG_EQUALIZER=m
CONFIG_TUN=m
CONFIG_ETHERTAP=m

#
# Ethernet (10 or 100Mbit)
#
CONFIG_NET_ETHERNET=y
CONFIG_MII=m

#
# Ethernet (1000 Mbit)
#

#
# Ethernet (10000 Mbit)
#

#
# Token Ring devices
#

#
# Wireless LAN (non-hamradio)
#
CONFIG_NET_RADIO=y

#
# Obsolete Wireless cards support (pre-802.11)
#
CONFIG_STRIP=m
CONFIG_ATMEL=m

#
# PCMCIA network device support
#
CONFIG_NET_PCMCIA=y

#
# Wan interfaces
#
CONFIG_WAN=y
CONFIG_SYNCLINK_SYNCPPP=m
CONFIG_HDLC=m
CONFIG_HDLC_RAW=y
CONFIG_HDLC_RAW_ETH=y
CONFIG_HDLC_CISCO=y
CONFIG_HDLC_FR=y
CONFIG_HDLC_PPP=y
CONFIG_HDLC_X25=y
CONFIG_DLCI=m
CONFIG_DLCI_COUNT=24
CONFIG_DLCI_MAX=8
# CONFIG_WAN_ROUTER_DRIVERS is not set
CONFIG_LAPBETHER=m
CONFIG_X25_ASY=m

#
# ATM drivers
#
CONFIG_ATM_TCP=m
CONFIG_PPP=m
CONFIG_PPP_MULTILINK=y
CONFIG_PPP_FILTER=y
CONFIG_PPP_ASYNC=m
CONFIG_PPP_SYNC_TTY=m
CONFIG_PPP_DEFLATE=m
CONFIG_PPP_BSDCOMP=m
CONFIG_PPPOE=m
CONFIG_PPPOATM=m
CONFIG_SLIP=m
CONFIG_SLIP_COMPRESSED=y
CONFIG_SLIP_SMART=y
CONFIG_SLIP_MODE_SLIP6=y
CONFIG_SHAPER=m
CONFIG_NETCONSOLE=m

#
# File systems
#
CONFIG_EXT2_FS=y
CONFIG_EXT2_FS_XATTR=y
CONFIG_EXT2_FS_POSIX_ACL=y
CONFIG_EXT2_FS_SECURITY=y
CONFIG_EXT3_FS=y
CONFIG_EXT3_FS_XATTR=y
CONFIG_EXT3_FS_POSIX_ACL=y
CONFIG_EXT3_FS_SECURITY=y
CONFIG_JBD=y
CONFIG_JBD_DEBUG=y
CONFIG_FS_MBCACHE=y
CONFIG_REISERFS_FS=y
# CONFIG_REISERFS_CHECK is not set
# CONFIG_REISERFS_PROC_INFO is not set
CONFIG_REISERFS_FS_XATTR=y
CONFIG_REISERFS_FS_POSIX_ACL=y
CONFIG_REISERFS_FS_SECURITY=y
CONFIG_JFS_FS=m
CONFIG_JFS_POSIX_ACL=y
# CONFIG_JFS_DEBUG is not set
CONFIG_JFS_STATISTICS=y
CONFIG_FS_POSIX_ACL=y
# CONFIG_XFS_FS is not set
CONFIG_MINIX_FS=m
CONFIG_ROMFS_FS=m
CONFIG_QUOTA=y
CONFIG_QFMT_V1=m
CONFIG_QFMT_V2=m
CONFIG_QUOTACTL=y
CONFIG_AUTOFS_FS=m
CONFIG_AUTOFS4_FS=m

#
# CD-ROM/DVD Filesystems
#
CONFIG_ISO9660_FS=m
CONFIG_JOLIET=y
CONFIG_ZISOFS=y
CONFIG_ZISOFS_FS=m
CONFIG_UDF_FS=m

#
# DOS/FAT/NT Filesystems
#
# CONFIG_FAT_FS is not set
# CONFIG_NTFS_FS is not set

#
# Pseudo filesystems
#
CONFIG_PROC_FS=y
CONFIG_PROC_KCORE=y
CONFIG_SYSFS=y
# CONFIG_DEVFS_FS is not set
CONFIG_DEVPTS_FS_XATTR=y
CONFIG_DEVPTS_FS_SECURITY=y
CONFIG_TMPFS=y
# CONFIG_HUGETLB_PAGE is not set
CONFIG_RAMFS=y

#
# Miscellaneous filesystems
#
# CONFIG_ADFS_FS is not set
# CONFIG_AFFS_FS is not set
# CONFIG_HFS_FS is not set
# CONFIG_HFSPLUS_FS is not set
# CONFIG_BEFS_FS is not set
# CONFIG_BFS_FS is not set
# CONFIG_EFS_FS is not set
# CONFIG_CRAMFS is not set
# CONFIG_VXFS_FS is not set
# CONFIG_HPFS_FS is not set
# CONFIG_QNX4FS_FS is not set
# CONFIG_SYSV_FS is not set
# CONFIG_UFS_FS is not set

#
# Network File Systems
#
CONFIG_NFS_FS=y
CONFIG_NFS_V3=y
CONFIG_NFS_V4=y
CONFIG_NFS_DIRECTIO=y
CONFIG_NFSD=m
CONFIG_NFSD_V3=y
CONFIG_NFSD_V4=y
CONFIG_NFSD_TCP=y
CONFIG_LOCKD=y
CONFIG_LOCKD_V4=y
CONFIG_EXPORTFS=m
CONFIG_SUNRPC=y
CONFIG_SUNRPC_GSS=y
CONFIG_RPCSEC_GSS_KRB5=y
CONFIG_SMB_FS=m
CONFIG_SMB_NLS_DEFAULT=y
CONFIG_SMB_NLS_REMOTE="cp437"
CONFIG_CIFS=m
# CONFIG_CIFS_STATS is not set
CONFIG_NCP_FS=m
CONFIG_NCPFS_PACKET_SIGNING=y
CONFIG_NCPFS_IOCTL_LOCKING=y
CONFIG_NCPFS_STRONG=y
CONFIG_NCPFS_NFS_NS=y
CONFIG_NCPFS_OS2_NS=y
CONFIG_NCPFS_SMALLDOS=y
CONFIG_NCPFS_NLS=y
CONFIG_NCPFS_EXTRAS=y
CONFIG_CODA_FS=m
# CONFIG_CODA_FS_OLD_API is not set
CONFIG_AFS_FS=m
CONFIG_RXRPC=m

#
# Partition Types
#
CONFIG_PARTITION_ADVANCED=y
# CONFIG_ACORN_PARTITION is not set
CONFIG_OSF_PARTITION=y
# CONFIG_AMIGA_PARTITION is not set
CONFIG_ATARI_PARTITION=y
CONFIG_MAC_PARTITION=y
CONFIG_MSDOS_PARTITION=y
CONFIG_BSD_DISKLABEL=y
# CONFIG_MINIX_SUBPARTITION is not set
CONFIG_SOLARIS_X86_PARTITION=y
CONFIG_UNIXWARE_DISKLABEL=y
CONFIG_LDM_PARTITION=y
# CONFIG_LDM_DEBUG is not set
CONFIG_NEC98_PARTITION=y
# CONFIG_SGI_PARTITION is not set
CONFIG_ULTRIX_PARTITION=y
CONFIG_SUN_PARTITION=y
CONFIG_EFI_PARTITION=y

#
# Native Language Support
#
CONFIG_NLS=y
CONFIG_NLS_DEFAULT="iso8859-1"
CONFIG_NLS_CODEPAGE_437=m
CONFIG_NLS_CODEPAGE_737=m
CONFIG_NLS_CODEPAGE_775=m
CONFIG_NLS_CODEPAGE_850=m
CONFIG_NLS_CODEPAGE_852=m
CONFIG_NLS_CODEPAGE_855=m
CONFIG_NLS_CODEPAGE_857=m
CONFIG_NLS_CODEPAGE_860=m
CONFIG_NLS_CODEPAGE_861=m
CONFIG_NLS_CODEPAGE_862=m
CONFIG_NLS_CODEPAGE_863=m
CONFIG_NLS_CODEPAGE_864=m
CONFIG_NLS_CODEPAGE_865=m
CONFIG_NLS_CODEPAGE_866=m
CONFIG_NLS_CODEPAGE_869=m
CONFIG_NLS_CODEPAGE_936=m
CONFIG_NLS_CODEPAGE_950=m
CONFIG_NLS_CODEPAGE_932=m
CONFIG_NLS_CODEPAGE_949=m
CONFIG_NLS_CODEPAGE_874=m
CONFIG_NLS_ISO8859_8=m
CONFIG_NLS_CODEPAGE_1250=m
CONFIG_NLS_CODEPAGE_1251=m
CONFIG_NLS_ISO8859_1=m
CONFIG_NLS_ISO8859_2=m
CONFIG_NLS_ISO8859_3=m
CONFIG_NLS_ISO8859_4=m
CONFIG_NLS_ISO8859_5=m
CONFIG_NLS_ISO8859_6=m
CONFIG_NLS_ISO8859_7=m
CONFIG_NLS_ISO8859_9=m
CONFIG_NLS_ISO8859_13=m
CONFIG_NLS_ISO8859_14=m
CONFIG_NLS_ISO8859_15=m
CONFIG_NLS_KOI8_R=m
CONFIG_NLS_KOI8_U=m
CONFIG_NLS_UTF8=m

#
# Security options
#
CONFIG_SECURITY=y
CONFIG_SECURITY_NETWORK=y
CONFIG_SECURITY_CAPABILITIES=y
# CONFIG_SECURITY_SELINUX is not set

#
# Cryptographic options
#
CONFIG_CRYPTO=y
CONFIG_CRYPTO_HMAC=y
CONFIG_CRYPTO_NULL=m
CONFIG_CRYPTO_MD4=m
CONFIG_CRYPTO_MD5=y
CONFIG_CRYPTO_SHA1=m
CONFIG_CRYPTO_SHA256=m
CONFIG_CRYPTO_SHA512=m
CONFIG_CRYPTO_DES=y
CONFIG_CRYPTO_BLOWFISH=m
CONFIG_CRYPTO_TWOFISH=m
CONFIG_CRYPTO_SERPENT=m
CONFIG_CRYPTO_AES=m
CONFIG_CRYPTO_CAST5=m
CONFIG_CRYPTO_CAST6=m
CONFIG_CRYPTO_ARC4=m
CONFIG_CRYPTO_DEFLATE=m
CONFIG_CRYPTO_MICHAEL_MIC=m
# CONFIG_CRYPTO_CRC32C is not set
CONFIG_CRYPTO_TEST=m

#
# Library routines
#
CONFIG_CRC32=y
# CONFIG_LIBCRC32C is not set
CONFIG_ZLIB_INFLATE=m
CONFIG_ZLIB_DEFLATE=m

#
# SCSI support
#
CONFIG_SCSI=m
CONFIG_GENERIC_ISA_DMA=y

#
# SCSI support type (disk, tape, CD-ROM)
#
CONFIG_BLK_DEV_SD=m
CONFIG_SD_EXTRA_DEVS=40
CONFIG_CHR_DEV_ST=m
CONFIG_BLK_DEV_SR=m
# CONFIG_BLK_DEV_SR_VENDOR is not set
CONFIG_SR_EXTRA_DEVS=4
CONFIG_CHR_DEV_SG=m

#
# Some SCSI devices (e.g. CD jukebox) support multiple LUNs
#
# CONFIG_SCSI_DEBUG_QUEUES is not set
CONFIG_SCSI_MULTI_LUN=y
CONFIG_SCSI_CONSTANTS=y
CONFIG_SCSI_LOGGING=y
CONFIG_SCSI_DEBUG=m

#
# Multi-device support (RAID and LVM)
#
CONFIG_MD=y
CONFIG_BLK_DEV_MD=y
CONFIG_MD_LINEAR=m
CONFIG_MD_RAID0=m
CONFIG_MD_RAID1=m
CONFIG_MD_RAID5=m
CONFIG_MD_RAID6=m
CONFIG_MD_MULTIPATH=m
CONFIG_BLK_DEV_DM=m
CONFIG_DM_CRYPT=m

#
# Memory Technology Devices (MTD)
#
# CONFIG_MTD is not set

#
# Kernel hacking
#
# CONFIG_DEBUG_SLAB is not set
# CONFIG_DEBUG_SPINLOCK is not set
# CONFIG_DEBUG_INFO is not set

RE: [uml-devel] uml_mconsole issue

[Anthony Brock]

Correction, I am seeing an error message on the console. From a "clean"
startup, it took four request for the contents of /proc/uptime before the
console displayed this:

dns2 login: Kernel panic: Segfault with no mm


As you can see, it was sitting at a login prompt during the issue. Also,
unlike previous times, the uml_mconsole command appeared to "freeze" until I
presses CTRL-C. Ideas?

Tony

> -----Original Message-----
> From: user-mode-linux-devel-admin@lists.sourceforge.net
> [mailto:user-mode-linux-devel-admin@lists.sourceforge.net]On Behalf Of
> Anthony Brock
> Sent: Tuesday, July 06, 2004 10:14 PM
> To: user-mode-linux-devel@lists.sourceforge.net
> Subject: [uml-devel] uml_mconsole issue
>
>
> I've been writing some scripts to probe my UML instances for simple
> statistics. However, after a few probes my UML instances crash.
> Specifically, I am issuing commands such as:
>
> $ uml_mconsole bind2 proc uptime
> OK 190.57 162.44
>
> $
>
> About 4 out of 5 times, this will perform successfully. However, this will
> occasionally return successfully (with the correct uptime) BUT the UML
> instance will no longer be running. The exit appears the be totally silent
> (no error messages, no warning and no running linux processes).
>
> My setup is as follows:
>
>
> Host:
> SuSE 9.1 Professional 32-Bit, 2.6.4-54.5-smp (stock kernel with SKAS mode
> enabled)
>
> Guest:
> Image: SuSE 9.0 Professional
> Kernel: linux-2.6.7 with uml-patch-2.6.7-01 and
> uml-linux-2.6.7-01-bb1.patch
> applied.
> Config: See attached
>
>
> Let me know if you require more detail and what specific steps I
> should take
> to help trouble-shoot this. Thanks in advance!
>
> Tony
>



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Re: [uml-devel] uml_mconsole issue

[BlaisorBlade]

Alle 07:14, mercoledì 7 luglio 2004, Anthony Brock ha scritto:
> Let me know if you require more detail and what specific steps I should
> take to help trouble-shoot this. Thanks in advance!
Could you try taking a "backtrace" from the UML? I've no time for now to 
explain it, but it has been explained tons of times on this ML... search for 
"backtrace" on the marc.theaimsgroup.com archives! See also the "debugging 
kernel" page (the subsection about skas).
-- 
Paolo Giarrusso, aka Blaisorblade
Linux registered user n. 292729



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RE: [uml-devel] uml_mconsole issue

[Anthony Brock]

Obviously, I'm doing something wrong. I tried following Blaisor's
instructions for a backtrace as posted on 2004-06-14 at:

http://marc.theaimsgroup.com/?l=user-mode-linux-user&m=108726561303235&w=2

However, I'm seeing the following:


$ TMP=/dev/shm gdb linux-2.6.7-32bit-debug
GNU gdb 6.1
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain
conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "i586-suse-linux"...Using host libthread_db
library "/lib/tls/libthread_db.so.1".

(gdb) set args umid=bind2 <... junk deleted ...>
(gdb) handle SIGUSR1 pass nostop noprint
Signal        Stop      Print   Pass to program Description
SIGUSR1       No        No      Yes             User defined signal 1
(gdb) handle SIGSEGV pass nostop noprint
Signal        Stop      Print   Pass to program Description
SIGSEGV       No        No      Yes             Segmentation fault
(gdb) break panic
Breakpoint 1 at 0xa0030d18: file kernel/panic.c, line 58.
(gdb) run
Starting program: linux-2.6.7-32bit-debug umid=bind2 mem=64M <... junk
deleted ...>
Detaching after fork from child process 9635.
Checking for the skas3 patch in the host...found
Checking for /proc/mm...found
Detaching after fork from child process 9636.
Detaching after fork from child process 9637.
Detaching after fork from child process 9638.
Detaching after fork from child process 9639.
Linux version 2.6.7-1um-debug (root@vs1) (gcc version 3.3.3 (SuSE Linux)) #3
Wed Jul 7 13:09:26 PDT 2004
On node 0 totalpages: 16384

<... startup junk deleted ...>


dns2 login: Kernel panic: Segfault with no mm


Program exited with code 01.
(gdb) bt
No stack.
(gdb) continue
The program is not being run.
(gdb) quit
$


How do I acquire the backtrace? I must be missing something obvious. Thanks
in advance!

Tony


> -----Original Message-----
> From: BlaisorBlade [mailto:blaisorblade_spam@yahoo.it]
> Sent: Wednesday, July 07, 2004 10:14 AM
> To: Anthony Brock; user-mode-linux-devel@lists.sourceforge.net
> Subject: Re: [uml-devel] uml_mconsole issue
>
>
> Alle 07:14, mercoledì 7 luglio 2004, Anthony Brock ha scritto:
> > Let me know if you require more detail and what specific steps I should
> > take to help trouble-shoot this. Thanks in advance!
> Could you try taking a "backtrace" from the UML? I've no time for now to
> explain it, but it has been explained tons of times on this ML...
> search for
> "backtrace" on the marc.theaimsgroup.com archives! See also the
> "debugging
> kernel" page (the subsection about skas).
> --
> Paolo Giarrusso, aka Blaisorblade
> Linux registered user n. 292729
>
>



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RE: [uml-devel] uml_mconsole issue

[Anthony Brock]

Okay, I think I have it. I shouldn't have issued the "handle SIGSEGV..."
command. This backtrace was generated on Kernel 2.6.7 during the 5th time I
issuing the following command on the host:

uml_mconsole bind2 proc uptime

*** BEGIN BACKTRACE ***
dns2 login:
Program received signal SIGSEGV, Segmentation fault.
0xa00730df in link_path_walk (name=0xa0a59ca9 "uptime", nd=0xa3fd3aa4) at
fs/namei.c:591
591                     lookup_flags = LOOKUP_FOLLOW;
(gdb) bt
#0  0xa00730df in link_path_walk (name=0xa0a59ca9 "uptime", nd=0xa3fd3aa4)
at fs/namei.c:591
#1  0xa00227de in mconsole_proc (req=0xa0a59c08) at
arch/um/drivers/mconsole_kern.c:152
#2  0xa0022584 in mc_work_proc (unused=0x0) at
arch/um/drivers/mconsole_kern.c:67
#3  0xa004162c in worker_thread (__cwq=0xa039084c) at kernel/workqueue.c:172
#4  0xa00448dc in kthread (_create=0xa3fdfb14) at kernel/kthread.c:90
#5  0xa00154da in run_kernel_thread (fn=0xa0044850 <kthread>,
arg=0xa3fdfb14, jmp_ptr=0x0) at arch/um/kernel/process.c:294
#6  0xa001f6ac in new_thread_handler (sig=10) at
arch/um/kernel/skas/process_kern.c:130
#7  <signal handler called>
#8  0xa01e305d in syscall () at slab.h:92
#9  0x00000000 in ?? ()
#10 0x00000000 in ?? ()
#11 0x00000000 in ?? ()
#12 0x00000000 in ?? ()
#13 0x00000000 in ?? ()
#14 0x00000000 in ?? ()
#15 0x00000000 in ?? ()
#16 0x00000000 in ?? ()
#17 0x00000000 in ?? ()
#18 0x00000000 in ?? ()
#19 0x00000000 in ?? ()
#20 0x00000000 in ?? ()
#21 0x00000000 in ?? ()
#22 0x00000000 in ?? ()
#23 0x00000000 in ?? ()
#24 0xa01caca4 in sigemptyset (set=0x0) at sigempty.c:34
Previous frame inner to this frame (corrupt stack?)
(gdb) c
Continuing.

Breakpoint 1, panic (fmt=0xa0224f96 "Segfault with no mm") at
kernel/panic.c:58
58              bust_spinlocks(1);
(gdb) c
Continuing.
Kernel panic: Segfault with no mm


Program exited with code 01.
(gdb) c
The program is not being run.
(gdb) quit
$
*** END BACKTRACE ***

Hope this helps!

Tony

> -----Original Message-----
> From: BlaisorBlade [mailto:blaisorblade_spam@yahoo.it]
> Sent: Wednesday, July 07, 2004 10:14 AM
> To: Anthony Brock; user-mode-linux-devel@lists.sourceforge.net
> Subject: Re: [uml-devel] uml_mconsole issue
>
>
> Alle 07:14, mercoledì 7 luglio 2004, Anthony Brock ha scritto:
> > Let me know if you require more detail and what specific steps I should
> > take to help trouble-shoot this. Thanks in advance!
> Could you try taking a "backtrace" from the UML? I've no time for now to
> explain it, but it has been explained tons of times on this ML...
> search for
> "backtrace" on the marc.theaimsgroup.com archives! See also the
> "debugging
> kernel" page (the subsection about skas).
> --
> Paolo Giarrusso, aka Blaisorblade
> Linux registered user n. 292729
>
>



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Re: [uml-devel] uml_mconsole issue

[Jeff Dike]

Anthony_Brock@ous.edu said:
> (gdb) bt 
> #0  0xa00730df in link_path_walk (name=0xa0a59ca9 "uptime", nd=0xa3fd3aa4) 
> at fs/namei.c:591 

This is known, and I haven't got around to fixing it yet.

				Jeff





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Re: [uml-devel] uml_mconsole issue

[BlaisorBlade]

Alle 22:36, lunedì 12 luglio 2004, Jeff Dike ha scritto:
> Anthony_Brock@ous.edu said:
> > (gdb) bt
> > #0  0xa00730df in link_path_walk (name=0xa0a59ca9 "uptime",
> > nd=0xa3fd3aa4) at fs/namei.c:591
>
> This is known, and I haven't got around to fixing it yet.
What about calling directly the inline version of read() from asm/unistd.h 
(something like kernel/kmod.c calling execve())? I also think that someone 
would kill you for such code duplication. Or not?
-- 
Paolo Giarrusso, aka Blaisorblade
Linux registered user n. 292729



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