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Subject[2.2pre] crash after unloading agpgart and loading mga DRM module
From

I could reproduce this with 2.2.18pre17 + Andrea's VM-global patch (-7),
pre20 with and without the VM patch.

Mainboard is a FIC VA503+, video is a G200.

Better run this with everything mounted RO:

$ insmod agpgart
$ rmmod agpgart
$ insmod agpgart
$ insmod mga

And here we go...

I tested a combinations, and what appears trigger the bug is the unloading
of agpgart and the subsequent loading of mga.


[Data gathered with vanilla pre20 - config file attached]

While in single-user mode, all FS mounted RO.

2 OOPSes at same EIP (locks_remove_flock+0x0E) for init are on screen,
similar ones for bash occured just before, although the 1st one for bash is
partly offscreen and I can't scrollback.

OOPSes per process are:

* paging request at e850097c (EFLAGS=00010286)
* NULL pointer dereference at 00...0008 (EFLAGS=00010292 in this case)

Not sure I remember the correct order, though.

A couple of "hda lost interrupt" also appear from time to time. All of this
(OOPS+lost intr) do not appear at once, but usually all of them come after
waiting some time. At the very least I only had bash not giving me a prompt
any more after hitting RETURN.

Anyone seing this ?
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#
# Automatically generated make config: don't edit
#

#
# Code maturity level options
#
CONFIG_EXPERIMENTAL=y

#
# Processor type and features
#
# CONFIG_M386 is not set
# CONFIG_M486 is not set
# CONFIG_M586 is not set
CONFIG_M586TSC=y
# CONFIG_M686 is not set
CONFIG_X86_WP_WORKS_OK=y
CONFIG_X86_INVLPG=y
CONFIG_X86_BSWAP=y
CONFIG_X86_POPAD_OK=y
CONFIG_X86_TSC=y
# CONFIG_MICROCODE is not set
CONFIG_X86_MSR=m
CONFIG_X86_CPUID=m
CONFIG_1GB=y
# CONFIG_2GB is not set
# CONFIG_MATH_EMULATION is not set
CONFIG_MTRR=y
# CONFIG_SMP is not set

#
# Loadable module support
#
CONFIG_MODULES=y
CONFIG_MODVERSIONS=y
CONFIG_KMOD=y

#
# General setup
#
CONFIG_NET=y
CONFIG_PCI=y
# CONFIG_PCI_GOBIOS is not set
# CONFIG_PCI_GODIRECT is not set
CONFIG_PCI_GOANY=y
CONFIG_PCI_BIOS=y
CONFIG_PCI_DIRECT=y
# CONFIG_PCI_QUIRKS is not set
CONFIG_PCI_OLD_PROC=y
# CONFIG_MCA is not set
# CONFIG_VISWS is not set
CONFIG_SYSVIPC=y
# CONFIG_BSD_PROCESS_ACCT is not set
CONFIG_SYSCTL=y
# CONFIG_BINFMT_AOUT is not set
CONFIG_BINFMT_ELF=y
CONFIG_BINFMT_MISC=m
# CONFIG_BINFMT_JAVA is not set
CONFIG_PARPORT=m
CONFIG_PARPORT_PC=m
# CONFIG_PARPORT_OTHER is not set
# CONFIG_APM is not set
# CONFIG_TOSHIBA is not set

#
# Plug and Play support
#
# CONFIG_PNP is not set

#
# Block devices
#
CONFIG_BLK_DEV_FD=m
CONFIG_BLK_DEV_IDE=y

#
# Please see Documentation/ide.txt for help/info on IDE drives
#
# CONFIG_BLK_DEV_HD_IDE is not set
CONFIG_BLK_DEV_IDEDISK=y
CONFIG_BLK_DEV_IDECD=m
# CONFIG_BLK_DEV_IDETAPE is not set
# CONFIG_BLK_DEV_IDEFLOPPY is not set
# CONFIG_BLK_DEV_IDESCSI is not set
# CONFIG_BLK_DEV_CMD640 is not set
# CONFIG_BLK_DEV_RZ1000 is not set
CONFIG_BLK_DEV_IDEPCI=y
CONFIG_BLK_DEV_IDEDMA=y
# CONFIG_BLK_DEV_OFFBOARD is not set
CONFIG_IDEDMA_AUTO=y
# CONFIG_BLK_DEV_OPTI621 is not set
# CONFIG_BLK_DEV_ALI15X3 is not set
# CONFIG_BLK_DEV_TRM290 is not set
# CONFIG_BLK_DEV_NS87415 is not set
CONFIG_BLK_DEV_VIA82C586=y
# CONFIG_BLK_DEV_CMD646 is not set
# CONFIG_BLK_DEV_CS5530 is not set
# CONFIG_IDE_CHIPSETS is not set

#
# Additional Block Devices
#
CONFIG_BLK_DEV_LOOP=m
# CONFIG_BLK_DEV_NBD is not set
# CONFIG_BLK_DEV_MD is not set
CONFIG_BLK_DEV_RAM=m
CONFIG_BLK_DEV_RAM_SIZE=4096
# CONFIG_BLK_DEV_XD is not set
# CONFIG_BLK_DEV_DAC960 is not set
CONFIG_PARIDE_PARPORT=m
# CONFIG_PARIDE is not set
# CONFIG_BLK_CPQ_DA is not set
# CONFIG_BLK_CPQ_CISS_DA is not set
# CONFIG_BLK_DEV_HD is not set

#
# Networking options
#
CONFIG_PACKET=m
CONFIG_NETLINK=y
CONFIG_RTNETLINK=y
# CONFIG_NETLINK_DEV is not set
# CONFIG_FIREWALL is not set
# CONFIG_FILTER is not set
CONFIG_UNIX=y
CONFIG_INET=y
# CONFIG_IP_MULTICAST is not set
# CONFIG_IP_ADVANCED_ROUTER is not set
# CONFIG_IP_PNP is not set
# CONFIG_IP_ROUTER is not set
# CONFIG_NET_IPIP is not set
# CONFIG_NET_IPGRE is not set
# CONFIG_IP_ALIAS is not set
# CONFIG_ARPD is not set
# CONFIG_SYN_COOKIES is not set

#
# (it is safe to leave these untouched)
#
# CONFIG_INET_RARP is not set
# CONFIG_SKB_LARGE is not set
# CONFIG_IPV6 is not set

#
#
#
# CONFIG_IPX is not set
# CONFIG_ATALK is not set
# CONFIG_X25 is not set
# CONFIG_LAPB is not set
# CONFIG_BRIDGE is not set
# CONFIG_NET_DIVERT is not set
# CONFIG_LLC is not set
# CONFIG_ECONET is not set
# CONFIG_WAN_ROUTER is not set
# CONFIG_NET_FASTROUTE is not set
# CONFIG_NET_HW_FLOWCONTROL is not set
# CONFIG_CPU_IS_SLOW is not set

#
# QoS and/or fair queueing
#
# CONFIG_NET_SCHED is not set

#
# Telephony Support
#
# CONFIG_PHONE is not set
# CONFIG_PHONE_IXJ is not set

#
# SCSI support
#
CONFIG_SCSI=m

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

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

#
# SCSI low-level drivers
#
# CONFIG_BLK_DEV_3W_XXXX_RAID is not set
# CONFIG_SCSI_7000FASST is not set
# CONFIG_SCSI_ACARD is not set
# CONFIG_SCSI_AHA152X is not set
# CONFIG_SCSI_AHA1542 is not set
# CONFIG_SCSI_AHA1740 is not set
# CONFIG_SCSI_AIC7XXX is not set
# CONFIG_SCSI_IPS is not set
# CONFIG_SCSI_ADVANSYS is not set
# CONFIG_SCSI_IN2000 is not set
# CONFIG_SCSI_AM53C974 is not set
# CONFIG_SCSI_MEGARAID is not set
# CONFIG_SCSI_BUSLOGIC is not set
# CONFIG_SCSI_CPQFCTS is not set
# CONFIG_SCSI_DTC3280 is not set
# CONFIG_SCSI_EATA is not set
# CONFIG_SCSI_EATA_DMA is not set
# CONFIG_SCSI_EATA_PIO is not set
# CONFIG_SCSI_FUTURE_DOMAIN is not set
# CONFIG_SCSI_GDTH is not set
# CONFIG_SCSI_GENERIC_NCR5380 is not set
# CONFIG_SCSI_INITIO is not set
# CONFIG_SCSI_INIA100 is not set
CONFIG_SCSI_PPA=m
# CONFIG_SCSI_IMM is not set
# CONFIG_SCSI_IZIP_EPP16 is not set
# CONFIG_SCSI_IZIP_SLOW_CTR is not set
# CONFIG_SCSI_NCR53C406A is not set
# CONFIG_SCSI_SYM53C416 is not set
# CONFIG_SCSI_SIM710 is not set
# CONFIG_SCSI_NCR53C7xx is not set
# CONFIG_SCSI_NCR53C8XX is not set
# CONFIG_SCSI_SYM53C8XX is not set
# CONFIG_SCSI_PAS16 is not set
# CONFIG_SCSI_PCI2000 is not set
# CONFIG_SCSI_PCI2220I is not set
# CONFIG_SCSI_PSI240I is not set
# CONFIG_SCSI_QLOGIC_FAS is not set
# CONFIG_SCSI_QLOGIC_ISP is not set
# CONFIG_SCSI_QLOGIC_FC is not set
# CONFIG_SCSI_SEAGATE is not set
# CONFIG_SCSI_DC390T is not set
# CONFIG_SCSI_T128 is not set
# CONFIG_SCSI_U14_34F is not set
# CONFIG_SCSI_ULTRASTOR is not set
# CONFIG_SCSI_DEBUG is not set

#
# I2O device support
#
# CONFIG_I2O is not set
# CONFIG_I2O_PCI is not set
# CONFIG_I2O_BLOCK is not set
# CONFIG_I2O_SCSI is not set

#
# Network device support
#
CONFIG_NETDEVICES=y

#
# ARCnet devices
#
# CONFIG_ARCNET is not set
CONFIG_DUMMY=m
# CONFIG_BONDING is not set
# CONFIG_EQUALIZER is not set
# CONFIG_ETHERTAP is not set
# CONFIG_NET_SB1000 is not set

#
# Ethernet (10 or 100Mbit)
#
CONFIG_NET_ETHERNET=y
# CONFIG_NET_VENDOR_3COM is not set
# CONFIG_LANCE is not set
# CONFIG_NET_VENDOR_SMC is not set
# CONFIG_NET_VENDOR_RACAL is not set
# CONFIG_RTL8139 is not set
# CONFIG_RTL8139TOO is not set
# CONFIG_NET_ISA is not set
CONFIG_NET_EISA=y
# CONFIG_PCNET32 is not set
# CONFIG_AC3200 is not set
# CONFIG_APRICOT is not set
# CONFIG_CS89x0 is not set
# CONFIG_DM9102 is not set
# CONFIG_DE4X5 is not set
# CONFIG_DEC_ELCP is not set
# CONFIG_DEC_ELCP_OLD is not set
# CONFIG_DGRS is not set
# CONFIG_EEXPRESS_PRO100 is not set
# CONFIG_LNE390 is not set
# CONFIG_NE3210 is not set
CONFIG_NE2K_PCI=m
# CONFIG_TLAN is not set
# CONFIG_VIA_RHINE is not set
# CONFIG_SIS900 is not set
# CONFIG_ES3210 is not set
# CONFIG_EPIC100 is not set
# CONFIG_ZNET is not set
# CONFIG_NET_POCKET is not set

#
# Ethernet (1000 Mbit)
#
# CONFIG_ACENIC is not set
# CONFIG_HAMACHI is not set
# CONFIG_YELLOWFIN is not set
# CONFIG_SK98LIN is not set
# CONFIG_FDDI is not set
# CONFIG_HIPPI is not set
# CONFIG_PLIP is not set
CONFIG_PPP=m
CONFIG_SLIP=m
CONFIG_SLIP_COMPRESSED=y
CONFIG_SLIP_SMART=y
# CONFIG_SLIP_MODE_SLIP6 is not set
# CONFIG_NET_RADIO is not set

#
# Token ring devices
#
# CONFIG_TR is not set
# CONFIG_NET_FC is not set
# CONFIG_RCPCI is not set
# CONFIG_SHAPER is not set

#
# Wan interfaces
#
# CONFIG_HOSTESS_SV11 is not set
# CONFIG_COSA is not set
# CONFIG_SEALEVEL_4021 is not set
# CONFIG_SYNCLINK_SYNCPPP is not set
# CONFIG_LANMEDIA is not set
# CONFIG_COMX is not set
# CONFIG_HDLC is not set
# CONFIG_DLCI is not set
# CONFIG_XPEED is not set
# CONFIG_SBNI is not set

#
# Amateur Radio support
#
# CONFIG_HAMRADIO is not set

#
# IrDA (infrared) support
#
# CONFIG_IRDA is not set

#
# ISDN subsystem
#
# CONFIG_ISDN is not set

#
# Old CD-ROM drivers (not SCSI, not IDE)
#
# CONFIG_CD_NO_IDESCSI is not set

#
# Character devices
#
CONFIG_VT=y
CONFIG_VT_CONSOLE=y
CONFIG_SERIAL=m
# CONFIG_SERIAL_EXTENDED is not set
# CONFIG_SERIAL_NONSTANDARD is not set
CONFIG_UNIX98_PTYS=y
CONFIG_UNIX98_PTY_COUNT=256
CONFIG_PRINTER=m
CONFIG_PRINTER_READBACK=y
CONFIG_MOUSE=y

#
# Mice
#
# CONFIG_ATIXL_BUSMOUSE is not set
# CONFIG_BUSMOUSE is not set
# CONFIG_MS_BUSMOUSE is not set
CONFIG_PSMOUSE=y
# CONFIG_82C710_MOUSE is not set
# CONFIG_PC110_PAD is not set

#
# Joysticks
#
CONFIG_JOYSTICK=m
CONFIG_JOY_ANALOG=m
# CONFIG_JOY_ASSASSIN is not set
# CONFIG_JOY_GRAVIS is not set
# CONFIG_JOY_LOGITECH is not set
# CONFIG_JOY_SIDEWINDER is not set
# CONFIG_JOY_THRUSTMASTER is not set
# CONFIG_JOY_CREATIVE is not set
# CONFIG_JOY_LIGHTNING is not set
# CONFIG_JOY_PCI is not set
# CONFIG_JOY_MAGELLAN is not set
# CONFIG_JOY_SPACEORB is not set
# CONFIG_JOY_SPACEBALL is not set
# CONFIG_JOY_WARRIOR is not set
# CONFIG_JOY_CONSOLE is not set
# CONFIG_JOY_DB9 is not set
# CONFIG_JOY_TURBOGRAFX is not set
# CONFIG_QIC02_TAPE is not set
CONFIG_WATCHDOG=y

#
# Watchdog Cards
#
# CONFIG_WATCHDOG_NOWAYOUT is not set
# CONFIG_WDT is not set
# CONFIG_WDTPCI is not set
CONFIG_SOFT_WATCHDOG=m
# CONFIG_PCWATCHDOG is not set
# CONFIG_ACQUIRE_WDT is not set
# CONFIG_60XX_WDT is not set
# CONFIG_MIXCOMWD is not set
CONFIG_NVRAM=m
CONFIG_RTC=y
# CONFIG_INTEL_RNG is not set
CONFIG_AGP=m
# CONFIG_AGP_INTEL is not set
# CONFIG_AGP_I810 is not set
CONFIG_AGP_VIA=y
# CONFIG_AGP_AMD is not set
# CONFIG_AGP_SIS is not set
# CONFIG_AGP_ALI is not set
CONFIG_DRM=m
# CONFIG_DRM_TDFX is not set
# CONFIG_DRM_GAMMA is not set
# CONFIG_DRM_R128 is not set
# CONFIG_DRM_I810 is not set
CONFIG_DRM_MGA=m

#
# Video For Linux
#
# CONFIG_VIDEO_DEV is not set
# CONFIG_DTLK is not set

#
# Ftape, the floppy tape device driver
#
# CONFIG_FTAPE is not set

#
# USB support
#
# CONFIG_USB is not set

#
# Filesystems
#
# CONFIG_QUOTA is not set
# CONFIG_AUTOFS_FS is not set
# CONFIG_ADFS_FS is not set
CONFIG_AFFS_FS=m
# CONFIG_HFS_FS is not set
CONFIG_FAT_FS=m
CONFIG_MSDOS_FS=m
# CONFIG_UMSDOS_FS is not set
CONFIG_VFAT_FS=m
CONFIG_ISO9660_FS=m
CONFIG_JOLIET=y
CONFIG_MINIX_FS=m
# CONFIG_NTFS_FS is not set
# CONFIG_HPFS_FS is not set
CONFIG_PROC_FS=y
CONFIG_DEVPTS_FS=y
# CONFIG_QNX4FS_FS is not set
# CONFIG_ROMFS_FS is not set
CONFIG_EXT2_FS=y
# CONFIG_SYSV_FS is not set
# CONFIG_UFS_FS is not set
# CONFIG_EFS_FS is not set

#
# Network File Systems
#
# CONFIG_CODA_FS is not set
CONFIG_NFS_FS=m
CONFIG_NFS_V3=y
# CONFIG_NFSD is not set
CONFIG_SUNRPC=m
CONFIG_LOCKD=m
# CONFIG_SMB_FS is not set
# CONFIG_NCP_FS is not set

#
# Partition Types
#
# CONFIG_BSD_DISKLABEL is not set
# CONFIG_MAC_PARTITION is not set
# CONFIG_SMD_DISKLABEL is not set
# CONFIG_SOLARIS_X86_PARTITION is not set
# CONFIG_UNIXWARE_DISKLABEL is not set
CONFIG_AMIGA_PARTITION=y
CONFIG_NLS=y

#
# Native Language Support
#
CONFIG_NLS_DEFAULT="cp437"
CONFIG_NLS_CODEPAGE_437=m
# CONFIG_NLS_CODEPAGE_737 is not set
# CONFIG_NLS_CODEPAGE_775 is not set
CONFIG_NLS_CODEPAGE_850=m
# CONFIG_NLS_CODEPAGE_852 is not set
# CONFIG_NLS_CODEPAGE_855 is not set
# CONFIG_NLS_CODEPAGE_857 is not set
# CONFIG_NLS_CODEPAGE_860 is not set
# CONFIG_NLS_CODEPAGE_861 is not set
# CONFIG_NLS_CODEPAGE_862 is not set
# CONFIG_NLS_CODEPAGE_863 is not set
# CONFIG_NLS_CODEPAGE_864 is not set
# CONFIG_NLS_CODEPAGE_865 is not set
# CONFIG_NLS_CODEPAGE_866 is not set
# CONFIG_NLS_CODEPAGE_869 is not set
# CONFIG_NLS_CODEPAGE_874 is not set
# CONFIG_NLS_CODEPAGE_932 is not set
# CONFIG_NLS_CODEPAGE_936 is not set
# CONFIG_NLS_CODEPAGE_949 is not set
# CONFIG_NLS_CODEPAGE_950 is not set
CONFIG_NLS_ISO8859_1=m
CONFIG_NLS_ISO8859_2=m
# CONFIG_NLS_ISO8859_3 is not set
# CONFIG_NLS_ISO8859_4 is not set
# CONFIG_NLS_ISO8859_5 is not set
# CONFIG_NLS_ISO8859_6 is not set
# CONFIG_NLS_ISO8859_7 is not set
# CONFIG_NLS_ISO8859_8 is not set
# CONFIG_NLS_ISO8859_9 is not set
# CONFIG_NLS_ISO8859_14 is not set
CONFIG_NLS_ISO8859_15=m
# CONFIG_NLS_KOI8_R is not set

#
# Console drivers
#
CONFIG_VGA_CONSOLE=y
CONFIG_VIDEO_SELECT=y
# CONFIG_MDA_CONSOLE is not set
CONFIG_FB=y
CONFIG_DUMMY_CONSOLE=y
# CONFIG_FB_PM2 is not set
# CONFIG_FB_ATY is not set
# CONFIG_FB_VESA is not set
# CONFIG_FB_VGA16 is not set
CONFIG_VIDEO_SELECT=y
CONFIG_FB_MATROX=m
# CONFIG_FB_MATROX_MILLENIUM is not set
# CONFIG_FB_MATROX_MYSTIQUE is not set
CONFIG_FB_MATROX_G100=y
# CONFIG_FB_MATROX_MULTIHEAD is not set
# CONFIG_FB_ATY128 is not set
# CONFIG_FB_VIRTUAL is not set
# CONFIG_FBCON_ADVANCED is not set
CONFIG_FBCON_CFB8=m
CONFIG_FBCON_CFB16=m
CONFIG_FBCON_CFB24=m
CONFIG_FBCON_CFB32=m
# CONFIG_FBCON_FONTWIDTH8_ONLY is not set
CONFIG_FBCON_FONTS=y
CONFIG_FONT_8x8=y
CONFIG_FONT_8x16=y
# CONFIG_FONT_SUN8x16 is not set
CONFIG_FONT_SUN12x22=y
# CONFIG_FONT_6x11 is not set
# CONFIG_FONT_PEARL_8x8 is not set
# CONFIG_FONT_ACORN_8x8 is not set

#
# Sound
#
CONFIG_SOUND=m
# CONFIG_SOUND_CMPCI is not set
# CONFIG_SOUND_CS4281 is not set
# CONFIG_SOUND_FUSION is not set
# CONFIG_SOUND_EMU10K1 is not set
# CONFIG_SOUND_ES1370 is not set
# CONFIG_SOUND_ES1371 is not set
# CONFIG_SOUND_MAESTRO is not set
# CONFIG_SOUND_ESSSOLO1 is not set
# CONFIG_SOUND_ICH is not set
# CONFIG_SOUND_SONICVIBES is not set
# CONFIG_SOUND_TRIDENT is not set
# CONFIG_SOUND_MSNDCLAS is not set
# CONFIG_SOUND_MSNDPIN is not set
# CONFIG_SOUND_VIA82CXXX is not set
CONFIG_SOUND_OSS=m
# CONFIG_SOUND_PAS is not set
# CONFIG_SOUND_SB is not set
CONFIG_SOUND_GUS=m
# CONFIG_GUS16 is not set
CONFIG_GUSMAX=y
# CONFIG_SOUND_MPU401 is not set
# CONFIG_SOUND_PSS is not set
# CONFIG_SOUND_MSS is not set
# CONFIG_SOUND_SSCAPE is not set
# CONFIG_SOUND_TRIX is not set
# CONFIG_SOUND_MAD16 is not set
# CONFIG_SOUND_WAVEFRONT is not set
# CONFIG_SOUND_CS4232 is not set
# CONFIG_SOUND_OPL3SA2 is not set
# CONFIG_SOUND_MAUI is not set
# CONFIG_SOUND_SGALAXY is not set
# CONFIG_SOUND_AD1816 is not set
# CONFIG_SOUND_OPL3SA1 is not set
# CONFIG_SOUND_SOFTOSS is not set
# CONFIG_SOUND_YM3812 is not set
# CONFIG_SOUND_VMIDI is not set
# CONFIG_SOUND_UART6850 is not set
# CONFIG_SOUND_NM256 is not set
# CONFIG_SOUND_YMPCI is not set
# CONFIG_SOUND_YMFPCI is not set

#
# Additional low level sound drivers
#
# CONFIG_LOWLEVEL_SOUND is not set

#
# Kernel hacking
#
CONFIG_MAGIC_SYSRQ=y
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