Re: CONFIG_VGACON_SOFT_SCROLLBACK crashes 2.6.17

Re: CONFIG_VGACON_SOFT_SCROLLBACK crashes 2.6.17

[Robert Hancock]

Antonino A. Daplas wrote:
>> This would have
>> different timings on different cpu kinds...
> 
> Yes. This is just a debugging patch to help me pinpoint where
> the problem is.
> 
>> maybe a short usleep()?
> 
> It can be called in any context, so sleep() will be illegal
> in certain circumstances.

That's what udelay is for :-)

-- 
Robert Hancock      Saskatoon, SK, Canada
To email, remove "nospam" from hancockr@nospamshaw.ca
Home Page: http://www.roberthancock.com/

CONFIG_VGACON_SOFT_SCROLLBACK crashes 2.6.17

[Al Boldi]

Enabling CONFIG_VGACON_SOFT_SCROLLBACK causes random fatal system freezes.

Especially, ping 10.1 -A easily causes a complete system hang during scroll.

Is there an easy way to fix this, other than disabling the option?

Thanks!

--
Al

Re: CONFIG_VGACON_SOFT_SCROLLBACK crashes 2.6.17

[Antonino A. Daplas]

Al Boldi wrote:
> Enabling CONFIG_VGACON_SOFT_SCROLLBACK causes random fatal system freezes.
> 
> Especially, ping 10.1 -A easily causes a complete system hang during scroll.
> 
> Is there an easy way to fix this, other than disabling the option?

I can't duplicate your problem. Did it ever work before?

Can you send me you kernel config?

Tony

Re: CONFIG_VGACON_SOFT_SCROLLBACK crashes 2.6.17

[Al Boldi]

Antonino A. Daplas wrote:
> Al Boldi wrote:
> > Enabling CONFIG_VGACON_SOFT_SCROLLBACK causes random fatal system
> > freezes.
> >
> > Especially, ping 10.1 -A easily causes a complete system hang during
> > scroll.
> >
> > Is there an easy way to fix this, other than disabling the option?
>
> I can't duplicate your problem. Did it ever work before?

This option did not exist before 2.6.17.

> Can you send me you kernel config?

Attached below.

BTW, is there any chance to patch your savagefb to support VIA/S3 UniChrome?

Thanks!

--
Al

---
CONFIG_X86_32=y
CONFIG_SEMAPHORE_SLEEPERS=y
CONFIG_X86=y
CONFIG_MMU=y
CONFIG_GENERIC_ISA_DMA=y
CONFIG_GENERIC_IOMAP=y
CONFIG_GENERIC_HWEIGHT=y
CONFIG_ARCH_MAY_HAVE_PC_FDC=y
CONFIG_DMI=y

#
# Code maturity level options
#
CONFIG_EXPERIMENTAL=y
CONFIG_BROKEN_ON_SMP=y
CONFIG_INIT_ENV_ARG_LIMIT=32

#
# General setup
#
CONFIG_LOCALVERSION=""
# CONFIG_LOCALVERSION_AUTO is not set
CONFIG_SWAP=y
CONFIG_SYSVIPC=y
# CONFIG_POSIX_MQUEUE is not set
# CONFIG_BSD_PROCESS_ACCT is not set
CONFIG_SYSCTL=y
# CONFIG_AUDIT is not set
# CONFIG_IKCONFIG is not set
# CONFIG_RELAY is not set
CONFIG_INITRAMFS_SOURCE=""
CONFIG_UID16=y
CONFIG_VM86=y
# CONFIG_CC_OPTIMIZE_FOR_SIZE is not set
CONFIG_EMBEDDED=y
CONFIG_KALLSYMS=y
# CONFIG_KALLSYMS_EXTRA_PASS is not set
# CONFIG_HOTPLUG is not set
CONFIG_PRINTK=y
CONFIG_BUG=y
# CONFIG_ELF_CORE is not set
CONFIG_BASE_FULL=y
CONFIG_FUTEX=y
CONFIG_EPOLL=y
CONFIG_SHMEM=y
CONFIG_SLAB=y
# CONFIG_TINY_SHMEM is not set
CONFIG_BASE_SMALL=0
# CONFIG_SLOB is not set

#
# Loadable module support
#
# CONFIG_MODULES is not set

#
# Block layer
#
# CONFIG_LBD is not set
# CONFIG_BLK_DEV_IO_TRACE is not set
# CONFIG_LSF is not set

#
# IO Schedulers
#
CONFIG_IOSCHED_NOOP=y
# CONFIG_IOSCHED_AS is not set
# CONFIG_IOSCHED_DEADLINE is not set
# CONFIG_IOSCHED_CFQ is not set
# CONFIG_DEFAULT_AS is not set
# CONFIG_DEFAULT_DEADLINE is not set
# CONFIG_DEFAULT_CFQ is not set
CONFIG_DEFAULT_NOOP=y
CONFIG_DEFAULT_IOSCHED="noop"

#
# Processor type and features
#
# CONFIG_SMP is not set
CONFIG_X86_PC=y
# CONFIG_X86_ELAN is not set
# CONFIG_X86_VOYAGER is not set
# CONFIG_X86_NUMAQ is not set
# CONFIG_X86_SUMMIT is not set
# CONFIG_X86_BIGSMP is not set
# CONFIG_X86_VISWS is not set
# CONFIG_X86_GENERICARCH is not set
# CONFIG_X86_ES7000 is not set
# CONFIG_M386 is not set
# CONFIG_M486 is not set
# CONFIG_M586 is not set
# CONFIG_M586TSC is not set
# CONFIG_M586MMX is not set
# CONFIG_M686 is not set
CONFIG_MPENTIUMII=y
# CONFIG_MPENTIUMIII is not set
# CONFIG_MPENTIUMM is not set
# CONFIG_MPENTIUM4 is not set
# CONFIG_MK6 is not set
# CONFIG_MK7 is not set
# CONFIG_MK8 is not set
# CONFIG_MCRUSOE is not set
# CONFIG_MEFFICEON is not set
# CONFIG_MWINCHIPC6 is not set
# CONFIG_MWINCHIP2 is not set
# CONFIG_MWINCHIP3D is not set
# CONFIG_MGEODEGX1 is not set
# CONFIG_MGEODE_LX is not set
# CONFIG_MCYRIXIII is not set
# CONFIG_MVIAC3_2 is not set
# CONFIG_X86_GENERIC is not set
CONFIG_X86_CMPXCHG=y
CONFIG_X86_XADD=y
CONFIG_X86_L1_CACHE_SHIFT=5
CONFIG_RWSEM_XCHGADD_ALGORITHM=y
CONFIG_GENERIC_CALIBRATE_DELAY=y
CONFIG_X86_WP_WORKS_OK=y
CONFIG_X86_INVLPG=y
CONFIG_X86_BSWAP=y
CONFIG_X86_POPAD_OK=y
CONFIG_X86_CMPXCHG64=y
CONFIG_X86_GOOD_APIC=y
CONFIG_X86_INTEL_USERCOPY=y
CONFIG_X86_USE_PPRO_CHECKSUM=y
CONFIG_X86_TSC=y
# CONFIG_HPET_TIMER is not set
CONFIG_PREEMPT_NONE=y
# CONFIG_PREEMPT_VOLUNTARY is not set
# CONFIG_PREEMPT is not set
# CONFIG_X86_UP_APIC is not set
# CONFIG_X86_MCE is not set
# CONFIG_TOSHIBA is not set
# CONFIG_I8K is not set
# CONFIG_X86_REBOOTFIXUPS is not set
# CONFIG_MICROCODE is not set
# CONFIG_X86_MSR is not set
# CONFIG_X86_CPUID is not set

#
# Firmware Drivers
#
# CONFIG_EDD is not set
# CONFIG_DELL_RBU is not set
# CONFIG_DCDBAS is not set
CONFIG_NOHIGHMEM=y
# CONFIG_HIGHMEM4G is not set
# CONFIG_HIGHMEM64G is not set
CONFIG_VMSPLIT_3G=y
# CONFIG_VMSPLIT_3G_OPT is not set
# CONFIG_VMSPLIT_2G is not set
# CONFIG_VMSPLIT_1G is not set
CONFIG_PAGE_OFFSET=0xC0000000
CONFIG_ARCH_FLATMEM_ENABLE=y
CONFIG_ARCH_SPARSEMEM_ENABLE=y
CONFIG_ARCH_SELECT_MEMORY_MODEL=y
CONFIG_SELECT_MEMORY_MODEL=y
CONFIG_FLATMEM_MANUAL=y
# CONFIG_DISCONTIGMEM_MANUAL is not set
# CONFIG_SPARSEMEM_MANUAL is not set
CONFIG_FLATMEM=y
CONFIG_FLAT_NODE_MEM_MAP=y
CONFIG_SPARSEMEM_STATIC=y
CONFIG_SPLIT_PTLOCK_CPUS=4
# CONFIG_MATH_EMULATION is not set
# CONFIG_MTRR is not set
# CONFIG_REGPARM is not set
# CONFIG_SECCOMP is not set
CONFIG_HZ_100=y
# CONFIG_HZ_250 is not set
# CONFIG_HZ_1000 is not set
CONFIG_HZ=100
# CONFIG_KEXEC is not set
CONFIG_PHYSICAL_START=0x100000

#
# Power management options (ACPI, APM)
#
# CONFIG_PM is not set

#
# ACPI (Advanced Configuration and Power Interface) Support
#
# CONFIG_ACPI is not set

#
# CPU Frequency scaling
#
# CONFIG_CPU_FREQ is not set

#
# Bus options (PCI, PCMCIA, EISA, MCA, ISA)
#
CONFIG_PCI=y
# CONFIG_PCI_GOBIOS is not set
# CONFIG_PCI_GOMMCONFIG is not set
# CONFIG_PCI_GODIRECT is not set
CONFIG_PCI_GOANY=y
CONFIG_PCI_BIOS=y
CONFIG_PCI_DIRECT=y
# CONFIG_PCIEPORTBUS is not set
CONFIG_ISA_DMA_API=y
# CONFIG_ISA is not set
# CONFIG_MCA is not set
# CONFIG_SCx200 is not set

#
# PCCARD (PCMCIA/CardBus) support
#
# CONFIG_PCCARD is not set

#
# PCI Hotplug Support
#
# CONFIG_HOTPLUG_PCI is not set

#
# Executable file formats
#
CONFIG_BINFMT_ELF=y
# CONFIG_BINFMT_AOUT is not set
# CONFIG_BINFMT_MISC is not set

#
# Networking
#
CONFIG_NET=y

#
# Networking options
#
# CONFIG_NETDEBUG is not set
CONFIG_PACKET=y
CONFIG_PACKET_MMAP=y
CONFIG_UNIX=y
# CONFIG_NET_KEY is not set
CONFIG_INET=y
CONFIG_IP_MULTICAST=y
# CONFIG_IP_ADVANCED_ROUTER is not set
CONFIG_IP_FIB_HASH=y
CONFIG_IP_PNP=y
# CONFIG_IP_PNP_DHCP is not set
CONFIG_IP_PNP_BOOTP=y
# CONFIG_IP_PNP_RARP is not set
# CONFIG_NET_IPIP is not set
# CONFIG_NET_IPGRE is not set
# CONFIG_IP_MROUTE is not set
# CONFIG_ARPD is not set
# CONFIG_SYN_COOKIES is not set
# CONFIG_INET_AH is not set
# CONFIG_INET_ESP is not set
# CONFIG_INET_IPCOMP is not set
# CONFIG_INET_XFRM_TUNNEL is not set
# CONFIG_INET_TUNNEL is not set
# CONFIG_INET_DIAG is not set
# CONFIG_TCP_CONG_ADVANCED is not set
CONFIG_TCP_CONG_BIC=y
# CONFIG_IPV6 is not set
# CONFIG_INET6_XFRM_TUNNEL is not set
# CONFIG_INET6_TUNNEL is not set
# CONFIG_NETFILTER is not set

#
# DCCP Configuration (EXPERIMENTAL)
#
# CONFIG_IP_DCCP is not set

#
# SCTP Configuration (EXPERIMENTAL)
#
# CONFIG_IP_SCTP is not set

#
# TIPC Configuration (EXPERIMENTAL)
#
# CONFIG_TIPC is not set
# CONFIG_ATM is not set
# CONFIG_BRIDGE is not set
# CONFIG_VLAN_8021Q is not set
# CONFIG_DECNET is not set
# CONFIG_LLC2 is not set
# CONFIG_IPX is not set
# CONFIG_ATALK is not set
# CONFIG_X25 is not set
# CONFIG_LAPB is not set
# CONFIG_NET_DIVERT is not set
# CONFIG_ECONET is not set
# CONFIG_WAN_ROUTER is not set

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

#
# Network testing
#
# CONFIG_NET_PKTGEN is not set
# CONFIG_HAMRADIO is not set
# CONFIG_IRDA is not set
# CONFIG_BT is not set
# CONFIG_IEEE80211 is not set

#
# Device Drivers
#

#
# Generic Driver Options
#
CONFIG_STANDALONE=y
# CONFIG_PREVENT_FIRMWARE_BUILD is not set
# CONFIG_FW_LOADER is not set

#
# Connector - unified userspace <-> kernelspace linker
#
# CONFIG_CONNECTOR is not set

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

#
# Parallel port support
#
# CONFIG_PARPORT is not set

#
# Plug and Play support
#

#
# Block devices
#
# CONFIG_BLK_DEV_FD is not set
# CONFIG_BLK_CPQ_DA is not set
# CONFIG_BLK_CPQ_CISS_DA is not set
# CONFIG_BLK_DEV_DAC960 is not set
# CONFIG_BLK_DEV_UMEM is not set
# CONFIG_BLK_DEV_COW_COMMON is not set
# CONFIG_BLK_DEV_LOOP is not set
# CONFIG_BLK_DEV_NBD is not set
# CONFIG_BLK_DEV_SX8 is not set
# CONFIG_BLK_DEV_RAM is not set
# CONFIG_BLK_DEV_INITRD is not set
# CONFIG_CDROM_PKTCDVD is not set
# CONFIG_ATA_OVER_ETH is not set

#
# ATA/ATAPI/MFM/RLL support
#
CONFIG_IDE=y
CONFIG_BLK_DEV_IDE=y

#
# Please see Documentation/ide.txt for help/info on IDE drives
#
# CONFIG_BLK_DEV_IDE_SATA is not set
# CONFIG_BLK_DEV_HD_IDE is not set
CONFIG_BLK_DEV_IDEDISK=y
CONFIG_IDEDISK_MULTI_MODE=y
CONFIG_BLK_DEV_IDECD=y
# CONFIG_BLK_DEV_IDETAPE is not set
# CONFIG_BLK_DEV_IDEFLOPPY is not set
# CONFIG_IDE_TASK_IOCTL is not set

#
# IDE chipset support/bugfixes
#
# CONFIG_IDE_GENERIC is not set
# CONFIG_BLK_DEV_CMD640 is not set
CONFIG_BLK_DEV_IDEPCI=y
# CONFIG_IDEPCI_SHARE_IRQ is not set
# CONFIG_BLK_DEV_OFFBOARD is not set
# CONFIG_BLK_DEV_GENERIC is not set
# CONFIG_BLK_DEV_OPTI621 is not set
# CONFIG_BLK_DEV_RZ1000 is not set
CONFIG_BLK_DEV_IDEDMA_PCI=y
# CONFIG_BLK_DEV_IDEDMA_FORCED is not set
CONFIG_IDEDMA_PCI_AUTO=y
# CONFIG_IDEDMA_ONLYDISK is not set
# CONFIG_BLK_DEV_AEC62XX is not set
# CONFIG_BLK_DEV_ALI15X3 is not set
# CONFIG_BLK_DEV_AMD74XX is not set
# CONFIG_BLK_DEV_ATIIXP is not set
# CONFIG_BLK_DEV_CMD64X is not set
# CONFIG_BLK_DEV_TRIFLEX is not set
# CONFIG_BLK_DEV_CY82C693 is not set
# CONFIG_BLK_DEV_CS5520 is not set
# CONFIG_BLK_DEV_CS5530 is not set
# CONFIG_BLK_DEV_CS5535 is not set
# CONFIG_BLK_DEV_HPT34X is not set
# CONFIG_BLK_DEV_HPT366 is not set
# CONFIG_BLK_DEV_SC1200 is not set
CONFIG_BLK_DEV_PIIX=y
# CONFIG_BLK_DEV_IT821X is not set
# CONFIG_BLK_DEV_NS87415 is not set
# CONFIG_BLK_DEV_PDC202XX_OLD is not set
# CONFIG_BLK_DEV_PDC202XX_NEW is not set
# CONFIG_BLK_DEV_SVWKS is not set
# CONFIG_BLK_DEV_SIIMAGE is not set
# CONFIG_BLK_DEV_SIS5513 is not set
# CONFIG_BLK_DEV_SLC90E66 is not set
# CONFIG_BLK_DEV_TRM290 is not set
CONFIG_BLK_DEV_VIA82CXXX=y
# CONFIG_IDE_ARM is not set
CONFIG_BLK_DEV_IDEDMA=y
# CONFIG_IDEDMA_IVB is not set
CONFIG_IDEDMA_AUTO=y
# CONFIG_BLK_DEV_HD is not set

#
# SCSI device support
#
# CONFIG_RAID_ATTRS is not set
# CONFIG_SCSI is not set

#
# Multi-device support (RAID and LVM)
#
# CONFIG_MD is not set

#
# Fusion MPT device support
#
# CONFIG_FUSION is not set

#
# IEEE 1394 (FireWire) support
#
# CONFIG_IEEE1394 is not set

#
# I2O device support
#
# CONFIG_I2O is not set

#
# Network device support
#
# CONFIG_NETDEVICES is not set
# CONFIG_DUMMY is not set
# CONFIG_BONDING is not set
# CONFIG_EQUALIZER is not set
# CONFIG_TUN is not set

#
# PHY device support
#
# CONFIG_PHYLIB is not set

#
# Ethernet (10 or 100Mbit)
#
CONFIG_NET_ETHERNET=y
CONFIG_MII=y
# CONFIG_HAPPYMEAL is not set
# CONFIG_SUNGEM is not set
# CONFIG_CASSINI is not set
# CONFIG_NET_VENDOR_3COM is not set

#
# Tulip family network device support
#
# CONFIG_NET_TULIP is not set
# CONFIG_HP100 is not set
CONFIG_NET_PCI=y
# CONFIG_PCNET32 is not set
# CONFIG_AMD8111_ETH is not set
# CONFIG_ADAPTEC_STARFIRE is not set
# CONFIG_B44 is not set
# CONFIG_FORCEDETH is not set
# CONFIG_DGRS is not set
# CONFIG_EEPRO100 is not set
# CONFIG_E100 is not set
# CONFIG_FEALNX is not set
# CONFIG_NATSEMI is not set
# CONFIG_NE2K_PCI is not set
# CONFIG_8139CP is not set
CONFIG_8139TOO=y
CONFIG_8139TOO_PIO=y
# CONFIG_8139TOO_TUNE_TWISTER is not set
# CONFIG_8139TOO_8129 is not set
# CONFIG_8139_OLD_RX_RESET is not set
# CONFIG_SIS900 is not set
# CONFIG_EPIC100 is not set
# CONFIG_SUNDANCE is not set
# CONFIG_TLAN is not set
CONFIG_VIA_RHINE=y
# CONFIG_VIA_RHINE_MMIO is not set

#
# Ethernet (1000 Mbit)
#
# CONFIG_ACENIC is not set
# CONFIG_DL2K is not set
# CONFIG_E1000 is not set
# CONFIG_NS83820 is not set
# CONFIG_HAMACHI is not set
# CONFIG_YELLOWFIN is not set
# CONFIG_R8169 is not set
# CONFIG_SIS190 is not set
# CONFIG_SKGE is not set
# CONFIG_SKY2 is not set
# CONFIG_SK98LIN is not set
# CONFIG_VIA_VELOCITY is not set
# CONFIG_TIGON3 is not set
# CONFIG_BNX2 is not set

#
# Ethernet (10000 Mbit)
#
# CONFIG_CHELSIO_T1 is not set
# CONFIG_IXGB is not set
# CONFIG_S2IO is not set
# CONFIG_FDDI is not set
# CONFIG_HIPPI is not set
# CONFIG_PPP is not set
# CONFIG_SLIP is not set
# CONFIG_SHAPER is not set
# CONFIG_NETCONSOLE is not set
# CONFIG_NETPOLL is not set
# CONFIG_NET_POLL_CONTROLLER is not set

#
# ISDN subsystem
#
# CONFIG_ISDN is not set

#
# Telephony Support
#
# CONFIG_PHONE is not set

#
# Input device support
#
CONFIG_INPUT=y

#
# Userland interfaces
#
CONFIG_INPUT_MOUSEDEV=y
CONFIG_INPUT_MOUSEDEV_PSAUX=y
CONFIG_INPUT_MOUSEDEV_SCREEN_X=1024
CONFIG_INPUT_MOUSEDEV_SCREEN_Y=768
# CONFIG_INPUT_JOYDEV is not set
# CONFIG_INPUT_TSDEV is not set
# CONFIG_INPUT_EVDEV is not set
# CONFIG_INPUT_EVBUG is not set

#
# Input Device Drivers
#
CONFIG_INPUT_KEYBOARD=y
CONFIG_KEYBOARD_ATKBD=y
# CONFIG_KEYBOARD_SUNKBD is not set
# CONFIG_KEYBOARD_LKKBD is not set
# CONFIG_KEYBOARD_XTKBD is not set
# CONFIG_KEYBOARD_NEWTON is not set
CONFIG_INPUT_MOUSE=y
CONFIG_MOUSE_PS2=y
# CONFIG_MOUSE_SERIAL is not set
# CONFIG_MOUSE_VSXXXAA is not set
# CONFIG_INPUT_JOYSTICK is not set
# CONFIG_INPUT_TOUCHSCREEN is not set
CONFIG_INPUT_MISC=y
CONFIG_INPUT_PCSPKR=y
# CONFIG_INPUT_WISTRON_BTNS is not set
# CONFIG_INPUT_UINPUT is not set

#
# Hardware I/O ports
#
CONFIG_SERIO=y
CONFIG_SERIO_I8042=y
# CONFIG_SERIO_SERPORT is not set
# CONFIG_SERIO_CT82C710 is not set
# CONFIG_SERIO_PCIPS2 is not set
CONFIG_SERIO_LIBPS2=y
# CONFIG_SERIO_RAW is not set
# CONFIG_GAMEPORT is not set

#
# Character devices
#
CONFIG_VT=y
CONFIG_VT_CONSOLE=y
CONFIG_HW_CONSOLE=y
# CONFIG_SERIAL_NONSTANDARD is not set

#
# Serial drivers
#
# CONFIG_SERIAL_8250 is not set

#
# Non-8250 serial port support
#
# CONFIG_SERIAL_JSM is not set
CONFIG_UNIX98_PTYS=y
# CONFIG_LEGACY_PTYS is not set

#
# IPMI
#
# CONFIG_IPMI_HANDLER is not set

#
# Watchdog Cards
#
# CONFIG_WATCHDOG is not set
# CONFIG_HW_RANDOM is not set
# CONFIG_NVRAM is not set
# CONFIG_RTC is not set
# CONFIG_GEN_RTC is not set
# CONFIG_DTLK is not set
# CONFIG_R3964 is not set
# CONFIG_APPLICOM is not set
# CONFIG_SONYPI is not set

#
# Ftape, the floppy tape device driver
#
# CONFIG_FTAPE is not set
# CONFIG_AGP is not set
# CONFIG_DRM is not set
# CONFIG_MWAVE is not set
# CONFIG_CS5535_GPIO is not set
# CONFIG_RAW_DRIVER is not set
# CONFIG_HANGCHECK_TIMER is not set

#
# TPM devices
#
# CONFIG_TCG_TPM is not set
# CONFIG_TELCLOCK is not set

#
# I2C support
#
# CONFIG_I2C is not set

#
# SPI support
#
# CONFIG_SPI is not set
# CONFIG_SPI_MASTER is not set

#
# Dallas's 1-wire bus
#
# CONFIG_W1 is not set

#
# Hardware Monitoring support
#
# CONFIG_HWMON is not set
# CONFIG_HWMON_VID is not set

#
# Misc devices
#
# CONFIG_IBM_ASM is not set

#
# Multimedia devices
#
# CONFIG_VIDEO_DEV is not set
CONFIG_VIDEO_V4L2=y

#
# Digital Video Broadcasting Devices
#
# CONFIG_DVB is not set

#
# Graphics support
#
# CONFIG_FB is not set
CONFIG_VIDEO_SELECT=y

#
# Console display driver support
#
CONFIG_VGA_CONSOLE=y
CONFIG_VGACON_SOFT_SCROLLBACK=y
CONFIG_VGACON_SOFT_SCROLLBACK_SIZE=64
CONFIG_DUMMY_CONSOLE=y

#
# Sound
#
# CONFIG_SOUND is not set

#
# USB support
#
CONFIG_USB_ARCH_HAS_HCD=y
CONFIG_USB_ARCH_HAS_OHCI=y
CONFIG_USB_ARCH_HAS_EHCI=y
# CONFIG_USB is not set

#
# NOTE: USB_STORAGE enables SCSI, and 'SCSI disk support'
#

#
# USB Gadget Support
#
# CONFIG_USB_GADGET is not set

#
# MMC/SD Card support
#
# CONFIG_MMC is not set

#
# LED devices
#
# CONFIG_NEW_LEDS is not set

#
# LED drivers
#

#
# LED Triggers
#

#
# InfiniBand support
#
# CONFIG_INFINIBAND is not set

#
# EDAC - error detection and reporting (RAS) (EXPERIMENTAL)
#
# CONFIG_EDAC is not set

#
# Real Time Clock
#
# CONFIG_RTC_CLASS is not set

#
# File systems
#
CONFIG_EXT2_FS=y
# CONFIG_EXT2_FS_XATTR is not set
# CONFIG_EXT2_FS_XIP is not set
CONFIG_EXT3_FS=y
# CONFIG_EXT3_FS_XATTR is not set
CONFIG_JBD=y
# CONFIG_JBD_DEBUG is not set
# CONFIG_REISERFS_FS is not set
# CONFIG_JFS_FS is not set
# CONFIG_FS_POSIX_ACL is not set
# CONFIG_XFS_FS is not set
# CONFIG_OCFS2_FS is not set
# CONFIG_MINIX_FS is not set
# CONFIG_ROMFS_FS is not set
# CONFIG_INOTIFY is not set
# CONFIG_QUOTA is not set
CONFIG_DNOTIFY=y
# CONFIG_AUTOFS_FS is not set
# CONFIG_AUTOFS4_FS is not set
# CONFIG_FUSE_FS is not set

#
# CD-ROM/DVD Filesystems
#
# CONFIG_ISO9660_FS is not set
# CONFIG_UDF_FS is not set

#
# DOS/FAT/NT Filesystems
#
# CONFIG_MSDOS_FS is not set
# CONFIG_VFAT_FS is not set
# CONFIG_NTFS_FS is not set

#
# Pseudo filesystems
#
CONFIG_PROC_FS=y
# CONFIG_PROC_KCORE is not set
CONFIG_SYSFS=y
CONFIG_TMPFS=y
# CONFIG_HUGETLBFS is not set
# CONFIG_HUGETLB_PAGE is not set
CONFIG_RAMFS=y
# CONFIG_CONFIGFS_FS is not set

#
# 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 is not set
# CONFIG_NFSD is not set
# CONFIG_SMB_FS is not set
# CONFIG_CIFS is not set
# CONFIG_NCP_FS is not set
# CONFIG_CODA_FS is not set
# CONFIG_AFS_FS is not set
# CONFIG_9P_FS is not set

#
# Partition Types
#
# CONFIG_PARTITION_ADVANCED is not set
CONFIG_MSDOS_PARTITION=y

#
# Native Language Support
#
# CONFIG_NLS is not set

#
# Instrumentation Support
#
# CONFIG_PROFILING is not set

#
# Kernel hacking
#
# CONFIG_PRINTK_TIME is not set
# CONFIG_MAGIC_SYSRQ is not set
# CONFIG_DEBUG_KERNEL is not set
CONFIG_LOG_BUF_SHIFT=14
# CONFIG_DEBUG_BUGVERBOSE is not set
# CONFIG_DEBUG_FS is not set
# CONFIG_UNWIND_INFO is not set
CONFIG_EARLY_PRINTK=y
CONFIG_STACK_BACKTRACE_COLS=2
# CONFIG_DOUBLEFAULT is not set

#
# Security options
#
# CONFIG_KEYS is not set
# CONFIG_SECURITY is not set

#
# Cryptographic options
#
# CONFIG_CRYPTO is not set

#
# Hardware crypto devices
#

#
# Library routines
#
# CONFIG_CRC_CCITT is not set
# CONFIG_CRC16 is not set
CONFIG_CRC32=y
# CONFIG_LIBCRC32C is not set
CONFIG_GENERIC_HARDIRQS=y
CONFIG_GENERIC_IRQ_PROBE=y
CONFIG_X86_BIOS_REBOOT=y
CONFIG_KTIME_SCALAR=y

Re: CONFIG_VGACON_SOFT_SCROLLBACK crashes 2.6.17

[Antonino A. Daplas]

Al Boldi wrote:
> Antonino A. Daplas wrote:
>> Al Boldi wrote:
>>> Enabling CONFIG_VGACON_SOFT_SCROLLBACK causes random fatal system
>>> freezes.
>>>
>>> Especially, ping 10.1 -A easily causes a complete system hang during
>>> scroll.
>>>
>>> Is there an easy way to fix this, other than disabling the option?
>> I can't duplicate your problem. Did it ever work before?
> 
> This option did not exist before 2.6.17.

I meant if you tried any of the -rc kernels. 

Anyway, can you try the patch below.  It's a debugging patch and
it will slow down the console.

If the system hang disappears, remove the line

    while (i--);

in include/linux/vt_buffer.h.  This line is introduced by
the patch below.

Let me know at what point it worked, or whether it worked at all.

> 
>> Can you send me you kernel config?
> 
> Attached below.
> 
> BTW, is there any chance to patch your savagefb to support VIA/S3 UniChrome?
> 

If someone posts a patch to lkml or fbdev-devel, why not?  But a separate
driver is probably better as the 2 are very different.

Tony

diff --git a/include/linux/vt_buffer.h b/include/linux/vt_buffer.h
index 057db7d..e9b6064 100644
--- a/include/linux/vt_buffer.h
+++ b/include/linux/vt_buffer.h
@@ -20,11 +20,21 @@ #endif
 
 #ifndef VT_BUF_HAVE_RW
 #define scr_writew(val, addr) (*(addr) = (val))
-#define scr_readw(addr) (*(addr))
-#define scr_memcpyw(d, s, c) memcpy(d, s, c)
-#define scr_memmovew(d, s, c) memmove(d, s, c)
-#define VT_BUF_HAVE_MEMCPYW
-#define VT_BUF_HAVE_MEMMOVEW
+//#define scr_readw(addr) (*(addr))
+
+static inline u16 scr_readw(volatile const u16 *addr)
+{
+    int i = 10000;
+    u16 val = *addr;
+
+    while (i--);
+    return val;
+}
+    
+//#define scr_memcpyw(d, s, c) memcpy(d, s, c)
+//#define scr_memmovew(d, s, c) memmove(d, s, c)
+#undef VT_BUF_HAVE_MEMCPYW
+#undef VT_BUF_HAVE_MEMMOVEW
 #endif
 
 #ifndef VT_BUF_HAVE_MEMSETW

Re: CONFIG_VGACON_SOFT_SCROLLBACK crashes 2.6.17

[Antonio Vargas]

On 6/22/06, Antonino A. Daplas <adaplas@gmail.com> wrote:
> Al Boldi wrote:
> > Antonino A. Daplas wrote:
> >> Al Boldi wrote:
> >>> Enabling CONFIG_VGACON_SOFT_SCROLLBACK causes random fatal system
> >>> freezes.
> >>>
> >>> Especially, ping 10.1 -A easily causes a complete system hang during
> >>> scroll.
> >>>
> >>> Is there an easy way to fix this, other than disabling the option?
> >> I can't duplicate your problem. Did it ever work before?
> >
> > This option did not exist before 2.6.17.
>
> I meant if you tried any of the -rc kernels.
>
> Anyway, can you try the patch below.  It's a debugging patch and
> it will slow down the console.
>
> If the system hang disappears, remove the line
>
>     while (i--);
>
> in include/linux/vt_buffer.h.  This line is introduced by
> the patch below.
>
> Let me know at what point it worked, or whether it worked at all.
>
> >
> >> Can you send me you kernel config?
> >
> > Attached below.
> >
> > BTW, is there any chance to patch your savagefb to support VIA/S3 UniChrome?
> >
>
> If someone posts a patch to lkml or fbdev-devel, why not?  But a separate
> driver is probably better as the 2 are very different.
>
> Tony
>
> diff --git a/include/linux/vt_buffer.h b/include/linux/vt_buffer.h
> index 057db7d..e9b6064 100644
> --- a/include/linux/vt_buffer.h
> +++ b/include/linux/vt_buffer.h
> @@ -20,11 +20,21 @@ #endif
>
>  #ifndef VT_BUF_HAVE_RW
>  #define scr_writew(val, addr) (*(addr) = (val))
> -#define scr_readw(addr) (*(addr))
> -#define scr_memcpyw(d, s, c) memcpy(d, s, c)
> -#define scr_memmovew(d, s, c) memmove(d, s, c)
> -#define VT_BUF_HAVE_MEMCPYW
> -#define VT_BUF_HAVE_MEMMOVEW
> +//#define scr_readw(addr) (*(addr))
> +
> +static inline u16 scr_readw(volatile const u16 *addr)
> +{
> +    int i = 10000;
> +    u16 val = *addr;
> +
> +    while (i--);
> +    return val;
> +}
> +
> +//#define scr_memcpyw(d, s, c) memcpy(d, s, c)
> +//#define scr_memmovew(d, s, c) memmove(d, s, c)
> +#undef VT_BUF_HAVE_MEMCPYW
> +#undef VT_BUF_HAVE_MEMMOVEW
>  #endif
>
>  #ifndef VT_BUF_HAVE_MEMSETW

Antonino, is this while(i--) a cpu busy-wait loop??? This would have
different timings on different cpu kinds... maybe a short usleep()?

Re: CONFIG_VGACON_SOFT_SCROLLBACK crashes 2.6.17

[Antonino A. Daplas]

Antonio Vargas wrote:
> On 6/22/06, Antonino A. Daplas <adaplas@gmail.com> wrote:
>> Al Boldi wrote:
>> > Antonino A. Daplas wrote:
>> >> Al Boldi wrote:
>> >>> Enabling CONFIG_VGACON_SOFT_SCROLLBACK causes random fatal system
>> >>> freezes.
>> >>>
>> >>> Especially, ping 10.1 -A easily causes a complete system hang during
>> >>> scroll.
>> >>>
>> >>> Is there an easy way to fix this, other than disabling the option?
>> >> I can't duplicate your problem. Did it ever work before?
>> >
>> > This option did not exist before 2.6.17.
>>
>> I meant if you tried any of the -rc kernels.
>>
>> Anyway, can you try the patch below.  It's a debugging patch and
>> it will slow down the console.
>>
>> If the system hang disappears, remove the line
>>
>>     while (i--);
>>
>> in include/linux/vt_buffer.h.  This line is introduced by
>> the patch below.
>>
>> Let me know at what point it worked, or whether it worked at all.
>>
>> >
>> >> Can you send me you kernel config?
>> >
>> > Attached below.
>> >
>> > BTW, is there any chance to patch your savagefb to support VIA/S3
>> UniChrome?
>> >
>>
>> If someone posts a patch to lkml or fbdev-devel, why not?  But a separate
>> driver is probably better as the 2 are very different.
>>
>> Tony
>>
>> diff --git a/include/linux/vt_buffer.h b/include/linux/vt_buffer.h
>> index 057db7d..e9b6064 100644
>> --- a/include/linux/vt_buffer.h
>> +++ b/include/linux/vt_buffer.h
>> @@ -20,11 +20,21 @@ #endif
>>
>>  #ifndef VT_BUF_HAVE_RW
>>  #define scr_writew(val, addr) (*(addr) = (val))
>> -#define scr_readw(addr) (*(addr))
>> -#define scr_memcpyw(d, s, c) memcpy(d, s, c)
>> -#define scr_memmovew(d, s, c) memmove(d, s, c)
>> -#define VT_BUF_HAVE_MEMCPYW
>> -#define VT_BUF_HAVE_MEMMOVEW
>> +//#define scr_readw(addr) (*(addr))
>> +
>> +static inline u16 scr_readw(volatile const u16 *addr)
>> +{
>> +    int i = 10000;
>> +    u16 val = *addr;
>> +
>> +    while (i--);
>> +    return val;
>> +}
>> +
>> +//#define scr_memcpyw(d, s, c) memcpy(d, s, c)
>> +//#define scr_memmovew(d, s, c) memmove(d, s, c)
>> +#undef VT_BUF_HAVE_MEMCPYW
>> +#undef VT_BUF_HAVE_MEMMOVEW
>>  #endif
>>
>>  #ifndef VT_BUF_HAVE_MEMSETW
> 
> Antonino, is this while(i--) a cpu busy-wait loop???

Yes.

> This would have
> different timings on different cpu kinds...

Yes. This is just a debugging patch to help me pinpoint where
the problem is.

> maybe a short usleep()?

It can be called in any context, so sleep() will be illegal
in certain circumstances.

Tony

Re: CONFIG_VGACON_SOFT_SCROLLBACK crashes 2.6.17

[Al Boldi]

Antonino A. Daplas wrote:
> Al Boldi wrote:
> > Antonino A. Daplas wrote:
> >> Al Boldi wrote:
> >>> Enabling CONFIG_VGACON_SOFT_SCROLLBACK causes random fatal system
> >>> freezes.
> >>>
> >>> Especially, ping 10.1 -A easily causes a complete system hang during
> >>> scroll.
> >>>
> >>> Is there an easy way to fix this, other than disabling the option?
> >>
> >> I can't duplicate your problem. Did it ever work before?
> >
> > This option did not exist before 2.6.17.
>
> I meant if you tried any of the -rc kernels.

If -rc's were additive, I would probably use them.  But they are not :(

> Anyway, can you try the patch below.  It's a debugging patch and
> it will slow down the console.

Yes, that did the trick, although it screws-up concurrent console access.

What is surprising though, is that SOFT_SCROLLBACK is supposed to slow the 
console down.  It actually looks that it speeds things up, albeit at higher 
CPU cost, by buffering screen updates.

This maybe hardware related.  This machine has an onboard VIA/S3 UniChrome 
chip, so I am thinking the CPU is dumping too fast for the chip to sync.

> If the system hang disappears, remove the line
>
>     while (i--);

Hangs again.

> > BTW, is there any chance to patch your savagefb to support VIA/S3
> > UniChrome?
>
> If someone posts a patch to lkml or fbdev-devel, why not?  But a separate
> driver is probably better as the 2 are very different.

VIA has a separate driver, couldn't this be merged with mainline?

Thanks!

--
Al

Re: CONFIG_VGACON_SOFT_SCROLLBACK crashes 2.6.17

[Antonino A. Daplas]

Al Boldi wrote:
> Antonino A. Daplas wrote:
>> Al Boldi wrote:
>>> Antonino A. Daplas wrote:
>>>> Al Boldi wrote:
> 
>> Anyway, can you try the patch below.  It's a debugging patch and
>> it will slow down the console.
> 
> Yes, that did the trick, although it screws-up concurrent console access.
> 
> What is surprising though, is that SOFT_SCROLLBACK is supposed to slow the 
> console down.  It actually looks that it speeds things up, albeit at higher 
> CPU cost, by buffering screen updates.
> 
> This maybe hardware related.  This machine has an onboard VIA/S3 UniChrome 
> chip, so I am thinking the CPU is dumping too fast for the chip to sync.
> 

That's what I thought too. But adding delays to the screen accessors is not
the correct fix. The screen buffer accessors, scr_readw() and scr_writew()
make assumptions that are not correct in all cases, that the screenbuffer
is either in system RAM or video RAM, never in both. (vgacon's screenbuffer
is video RAM while the rest of the console drivers have it in system RAM.
But you can have vgacon and fbcon compiled at the same time, for example, and
this basically screws up the screen accessors, especially in non-x86 archs.)

So a revamp of vgacon may be necessary, by placing the screen buffer in
system RAM. This will entail a lot of work, so the revamp will take some
time.

>> If the system hang disappears, remove the line
>>
>>     while (i--);
> 
> Hangs again.

I was hoping that's it's the memcpy() that's buggy when the source/destination
is video RAM.  That would be an easy fix, but it seems I'm out of luck here.

> 
>>> BTW, is there any chance to patch your savagefb to support VIA/S3
>>> UniChrome?
>> If someone posts a patch to lkml or fbdev-devel, why not?  But a separate
>> driver is probably better as the 2 are very different.
> 
> VIA has a separate driver, couldn't this be merged with mainline?

Sure, as long as it's GPL-compatible, properly written, and correctly
Signed-off.

Tony

Re: CONFIG_VGACON_SOFT_SCROLLBACK crashes 2.6.17

[Al Boldi]

Antonino A. Daplas wrote:
>
> (vgacon's screenbuffer is video RAM while the rest of the console drivers
> have it in system RAM. But you can have vgacon and fbcon compiled at the
> same time, for example, and this basically screws up the screen accessors,
> especially in non-x86 archs.)
>
> So a revamp of vgacon may be necessary, by placing the screen buffer in
> system RAM. This will entail a lot of work, so the revamp will take some
> time.

Thanks for looking into this.

> > VIA has a separate driver, couldn't this be merged with mainline?
>
> Sure, as long as it's GPL-compatible, properly written, and correctly
> Signed-off.

Attached below is their license.  Is it GPL-compatible?

Thanks!

--
Al

---
/*
 * Copyright 1998-2006 VIA Technologies, Inc. All Rights Reserved.
 * Copyright 2001-2006 S3 Graphics, Inc. All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sub license,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHOR(S) OR COPYRIGHT HOLDER(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 */

(... and at the end of viafbdev.c it says this ...)

#if LINUX_VERSION_CODE > KERNEL_VERSION(2,4,9)
    MODULE_LICENSE("GPL");
#endif

Re: CONFIG_VGACON_SOFT_SCROLLBACK crashes 2.6.17

[Antonino A. Daplas]

Al Boldi wrote:
> Antonino A. Daplas wrote:
>> (vgacon's screenbuffer is video RAM while the rest of the console drivers
>> have it in system RAM. But you can have vgacon and fbcon compiled at the
>> same time, for example, and this basically screws up the screen accessors,
>> especially in non-x86 archs.)
>>
>> So a revamp of vgacon may be necessary, by placing the screen buffer in
>> system RAM. This will entail a lot of work, so the revamp will take some
>> time.
> 
> Thanks for looking into this.
> 
>>> VIA has a separate driver, couldn't this be merged with mainline?
>> Sure, as long as it's GPL-compatible, properly written, and correctly
>> Signed-off.
> 
> Attached below is their license.  Is it GPL-compatible?

The license text is MIT. A note from the author explicitly stating GPL
compatibility or dual-licensing the code is much better. 

Also, I prefer that the author of the code himself submit it for inclusion.

Tony

Re: CONFIG_VGACON_SOFT_SCROLLBACK crashes 2.6.17

[Randy.Dunlap]

On Thu, 22 Jun 2006 20:36:45 +0300 Al Boldi wrote:

> Antonino A. Daplas wrote:
> > Al Boldi wrote:
> > > Antonino A. Daplas wrote:
> > >> Al Boldi wrote:
> > >>> Enabling CONFIG_VGACON_SOFT_SCROLLBACK causes random fatal system
> > >>> freezes.
> > >>>
> > >>> Especially, ping 10.1 -A easily causes a complete system hang during
> > >>> scroll.
> > >>>
> > >>> Is there an easy way to fix this, other than disabling the option?
> > >>
> > >> I can't duplicate your problem. Did it ever work before?
> > >
> > > This option did not exist before 2.6.17.
> >
> > I meant if you tried any of the -rc kernels.
> 
> If -rc's were additive, I would probably use them.  But they are not :(

How big is that problem?  You can use ketchup
(http://www.selenic.com/ketchup/wiki/) or
http://www.xenotime.net/linux/scripts/grab-kernel-rc
to automate that.

---
~Randy

Re: CONFIG_VGACON_SOFT_SCROLLBACK crashes 2.6.17

[Al Boldi]

Randy.Dunlap wrote:
> > > I meant if you tried any of the -rc kernels.
> >
> > If -rc's were additive, I would probably use them.  But they are not :(
>
> How big is that problem?  You can use ketchup
> (http://www.selenic.com/ketchup/wiki/) or
> http://www.xenotime.net/linux/scripts/grab-kernel-rc
> to automate that.

Does that script also improve dial-up bps :)

Thanks!

--
Al