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SubjectRe: OOPS on reboot with 2.1.20
I have the same problem with the 2.1.20 on an 486dx2-66, it looks like the 
problem is in the hard_reset_now function, but I am not able to fix it.

Regards,

Stefanita Vilcu
---
Network Administrator, Logic Telecom S.A., Romania
E-mail: vsv@logicnet.ro, phone: +40-1-3213635, fax: +40-1-3213730


luana~# reboot -f
Segmentation fault

luana~# dmesg
Unable to handle kernel NULL pointer dereference at virtual address 00000472
current->tss.cr3 = 00bec000, %cr3 = 00bec000
*pde = 00000000
Oops: 0002
CPU: 0
EIP: 0010:[<c0109855>]
EFLAGS: 00010246
eax: c0530000 ebx: 00000000 ecx: 28121969 edx: 01234567
esi: 00000003 edi: 08048e60 ebp: bffff888 esp: c0b49fa4
ds: 0018 es: 0018 ss: 0018
Process reboot (pid: 267, process nr: 45, stackpage=c0b49000)
Stack: 00000000 00000003 08048e60 bffff888 c0e9ee18 c0114181 c0535810 c010a898
fee1dead 28121969 01234567 00000003 08048e60 bffff888 00000058 0000002b
0000002b 00000058 4005cf84 00000023 00000282 bffff884 0000002b
Call Trace: [<c0114181>] [<c010a898>]
Code: 66 a3 72 04 00 00 bd bc a7 00 00 8b 15 98 dc 1a c0 89 e8 f7

luana~# dmesg | ksymoops /System.map
Using `/System.map' to map addresses to symbols.

>>EIP: c0109855 <hard_reset_now+25/120>
Trace: c0114181 <sys_reboot+81/120>
Trace: c010a898 <system_call+38/40>

Code: c0109855 <hard_reset_now+25/120> movw %ax,0x472
Code: c010985b <hard_reset_now+2b/120> movl $0xa7bc,%ebp
Code: c0109860 <hard_reset_now+30/120> movl 0xc01adc98,%edx
Code: c0109866 <hard_reset_now+36/120> movl %ebp,%eax

luana~# cat /proc/version
Linux version 2.1.20 (root@luana.logictl.com) (gcc version 2.7.2) #5 Sat Jan 4 20:45:50 EET 1997

My /usr/src/linux/.config is:

#
# Automatically generated make config: don't edit
#

#
# Code maturity level options
#
# CONFIG_EXPERIMENTAL is not set

#
# Loadable module support
#
CONFIG_MODULES=y
# CONFIG_MODVERSIONS is not set
# CONFIG_KERNELD is not set

#
# General setup
#
# CONFIG_MATH_EMULATION is not set
CONFIG_NET=y
# CONFIG_MAX_16M is not set
# CONFIG_PCI is not set
# CONFIG_MCA is not set
CONFIG_SYSVIPC=y
CONFIG_BINFMT_AOUT=m
CONFIG_BINFMT_ELF=y
# CONFIG_M386 is not set
CONFIG_M486=y
# CONFIG_M586 is not set
# CONFIG_M686 is not set
CONFIG_VIDEO_SELECT=y

#
# Floppy, IDE, and other block devices
#
CONFIG_BLK_DEV_FD=y
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 is not set
# CONFIG_BLK_DEV_IDETAPE is not set
CONFIG_BLK_DEV_IDEFLOPPY=y
# CONFIG_BLK_DEV_IDESCSI is not set
CONFIG_BLK_DEV_CMD640=y
# CONFIG_BLK_DEV_CMD640_ENHANCED is not set
# CONFIG_IDE_CHIPSETS is not set

#
# Additional Block Devices
#
# CONFIG_BLK_DEV_LOOP is not set
# CONFIG_BLK_DEV_MD is not set
# CONFIG_BLK_DEV_RAM is not set
# CONFIG_BLK_DEV_XD is not set
# CONFIG_BLK_DEV_EZ is not set
# CONFIG_BLK_DEV_HD is not set

#
# Networking options
#
# CONFIG_NETLINK is not set
# CONFIG_FIREWALL is not set
CONFIG_NET_ALIAS=y
CONFIG_INET=y
# CONFIG_IP_FORWARD is not set
CONFIG_IP_MULTICAST=y
# CONFIG_IP_ACCT is not set
CONFIG_IP_ALIAS=y

#
# (it is safe to leave these untouched)
#
# CONFIG_INET_PCTCP is not set
# CONFIG_INET_RARP is not set
CONFIG_PATH_MTU_DISCOVERY=y
CONFIG_IP_NOSR=y
CONFIG_SKB_LARGE=y

#
#
#
# CONFIG_IPX is not set
# CONFIG_ATALK is not set
# CONFIG_AX25 is not set

#
# SCSI support
#
# CONFIG_SCSI is not set

#
# Network device support
#
CONFIG_NETDEVICES=y
# CONFIG_ARCNET is not set
CONFIG_DUMMY=m
# CONFIG_EQUALIZER is not set
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_ISA=y
# CONFIG_E2100 is not set
# CONFIG_DEPCA is not set
# CONFIG_EWRK3 is not set
# CONFIG_EEXPRESS is not set
# CONFIG_HPLAN_PLUS is not set
# CONFIG_HPLAN is not set
# CONFIG_HP100 is not set
CONFIG_NE2000=y
# CONFIG_NI52 is not set
# CONFIG_NI65 is not set
# CONFIG_SK_G16 is not set
# CONFIG_NET_EISA is not set
# CONFIG_NET_POCKET is not set
# CONFIG_FDDI is not set
# CONFIG_DLCI is not set
# CONFIG_PLIP is not set
# CONFIG_PPP is not set
# CONFIG_NET_RADIO is not set
# CONFIG_LAPBETHER is not set
# CONFIG_SLIP is not set
# CONFIG_TR is not set

#
# ISDN subsystem
#
# CONFIG_ISDN is not set

#
# CD-ROM drivers (not for SCSI or IDE/ATAPI drives)
#
# CONFIG_CD_NO_IDESCSI is not set

#
# Filesystems
#
# CONFIG_QUOTA is not set
CONFIG_MINIX_FS=m
# CONFIG_EXT_FS is not set
CONFIG_EXT2_FS=y
# CONFIG_XIA_FS is not set
CONFIG_FAT_FS=y
CONFIG_MSDOS_FS=y
# CONFIG_VFAT_FS is not set
# CONFIG_UMSDOS_FS is not set
CONFIG_PROC_FS=y
CONFIG_NFS_FS=y
# CONFIG_ROOT_NFS is not set
# CONFIG_SMB_FS is not set
# CONFIG_ISO9660_FS is not set
# CONFIG_HPFS_FS is not set
# CONFIG_SYSV_FS is not set
# CONFIG_AFFS_FS is not set
# CONFIG_UFS_FS is not set

#
# Character devices
#
CONFIG_SERIAL=m
# CONFIG_DIGI is not set
# CONFIG_CYCLADES is not set
# CONFIG_STALDRV is not set
# CONFIG_RISCOM8 is not set
# CONFIG_ESPSERIAL is not set
CONFIG_PRINTER=m
CONFIG_MOUSE=y
# 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_UMISC is not set
# CONFIG_QIC02_TAPE is not set
# CONFIG_FTAPE is not set
# CONFIG_APM is not set
# CONFIG_WATCHDOG is not set
# CONFIG_RTC is not set

#
# Sound
#
# CONFIG_SOUND is not set

#
# Kernel hacking
#
# CONFIG_PROFILE is not set

Best Regards,

Stefanita Vilcu
---
Network Administrator, Logic Telecom S.A., Romania
E-mail: vsv@logicnet.ro, phone: +40-1-3213635, fax: +40-1-3213730



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