File corruption when using kernels 2.6.18+

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* File corruption when using kernels 2.6.18+
@ 2007-09-30 15:40 Neil Romig
  2007-09-30 16:29 ` Pekka Enberg
  2007-10-02 22:30 ` Chuck Ebbert
  0 siblings, 2 replies; 15+ messages in thread
From: Neil Romig @ 2007-09-30 15:40 UTC (permalink / raw)
  To: linux-kernel

I am using kernel 2.6.17.14, and would like to use newer versions for the wireless code but I get file corruption with any kernel 
more recent than this. My system uses a SiS645DX chipset (it is a rebadged CLEVO D400E) with 5513 IDE.

I get this corruption with read/writes, i.e using "cp", "dd", when compiling software, writing to CD, etc etc. An example:

cp ../Changelog-2.6.18 .
diff Changelog-2.6.18 ../Changelog-2.6.18

16377c16377
<       LD      .top_vmlinux1
---
 >       LD      .tmp_vmlinux1
23954c23954
< Date:   Mon Jul 1% 04:45:11 2006 -0700
---
 > Date:   Mon Jul 10 04:45:11 2006 -0700
24955c24955
<     This is generally useful, but partacularly helps see if it is the same sector
---
 >     This is generally useful, but particularly helps see if it is the same sector
31879c31879
<     [MMC] sdhci: version bump cdhci
---
 >     [MMC] sdhci: version bump sdhci
42955c42955
<     Replace `he temp makefile hacks with proper CONFIG entries, which are also
---
 >     Replace the temp makefile hacks with proper CONFIG entries, which are also
49050c49050
<       and this task is(already holding:
---
 >       and this task is already holding:
[output clipped]

I would suspect a memory problem but memtest86+ gives no errors despite numerous passes, and I get no errors in older kernels. Does 
anyone have any idea what changed in 2.6.18 to cause such an error?

I have tried some obvious things (see thread on linuxquestions.org: 
http://www.linuxquestions.org/questions/showthread.php?t=578200), but I don't understand enough about the kernel to get any further.

Neil.

^ permalink raw reply	[flat|nested] 15+ messages in thread

* Re: File corruption when using kernels 2.6.18+
  2007-09-30 15:40 File corruption when using kernels 2.6.18+ Neil Romig
@ 2007-09-30 16:29 ` Pekka Enberg
  2007-10-02 21:05   ` Neil Romig
  2007-10-02 22:30 ` Chuck Ebbert
  1 sibling, 1 reply; 15+ messages in thread
From: Pekka Enberg @ 2007-09-30 16:29 UTC (permalink / raw)
  To: Neil Romig; +Cc: linux-kernel

Hi Neil,

On 9/30/07, Neil Romig <neil@romig.demon.co.uk> wrote:
> I would suspect a memory problem but memtest86+ gives no errors despite numerous
> passes, and I get no errors in older kernels. Does anyone have any idea what changed in
> 2.6.18 to cause such an error?

I don't but you can try to isolate the changeset introducing the
corruption with git-bisect:

http://kernel.org/pub/software/scm/git/docs/v1.3.3/howto/isolate-bugs-with-bisect.txt

So, in your case, you do:

<clone Linux mainline git repository>
# git bisect start
# git bisect bad v2.6.18
# git bisect good v2.6.17

then

<recompile and test>
<git bisect [good|bad] depending on results>
<repeat until you've narrowed down the changeset>

Also, please remember to send your .config when reporting bugs as
described in REPORTING-BUGS.

                                         Pekka

^ permalink raw reply	[flat|nested] 15+ messages in thread

* Re: File corruption when using kernels 2.6.18+
  2007-09-30 16:29 ` Pekka Enberg
@ 2007-10-02 21:05   ` Neil Romig
  2007-10-03  5:18     ` Pekka Enberg
  0 siblings, 1 reply; 15+ messages in thread
From: Neil Romig @ 2007-10-02 21:05 UTC (permalink / raw)
  To: Pekka Enberg; +Cc: linux-kernel, hyoshiok

[-- Attachment #1: Type: text/plain, Size: 1373 bytes --]

Pekka Enberg wrote:
> Hi Neil,
> 
> On 9/30/07, Neil Romig <neil@romig.demon.co.uk> wrote:
>> I would suspect a memory problem but memtest86+ gives no errors despite numerous
>> passes, and I get no errors in older kernels. Does anyone have any idea what changed in
>> 2.6.18 to cause such an error?
> 
> I don't but you can try to isolate the changeset introducing the
> corruption with git-bisect:
> 
> http://kernel.org/pub/software/scm/git/docs/v1.3.3/howto/isolate-bugs-with-bisect.txt
> 
> So, in your case, you do:
> 
> <clone Linux mainline git repository>
> # git bisect start
> # git bisect bad v2.6.18
> # git bisect good v2.6.17
> 
> then
> 
> <recompile and test>
> <git bisect [good|bad] depending on results>
> <repeat until you've narrowed down the changeset>
> 
> Also, please remember to send your .config when reporting bugs as
> described in REPORTING-BUGS.
> 
>                                          Pekka
> 
Thanks for your help on this. I have narrowed it down to commit "c22ce143d15eb288543fe9873e1c5ac1c01b69a1 x86: cache pollution aware 
__copy_from_user_ll()". This fits with the errors I'm getting, so now I need to find out if I can safely ignore this patch, or does 
it have to be modified? This is my first Linux bug in many years of simply using it, so I'm a little nervous!

My kernel .config is attached, along with lspci output.

Neil

[-- Attachment #2: config --]
[-- Type: text/plain, Size: 32741 bytes --]

#
# Automatically generated make config: don't edit
# Linux kernel version: 2.6.17
# Tue Oct  2 21:34:37 2007
#
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=y
# CONFIG_IKCONFIG_PROC 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 is not set
CONFIG_KALLSYMS=y
# CONFIG_KALLSYMS_EXTRA_PASS is not set
CONFIG_HOTPLUG=y
CONFIG_PRINTK=y
CONFIG_BUG=y
CONFIG_ELF_CORE=y
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=y
CONFIG_MODULE_UNLOAD=y
# CONFIG_MODULE_FORCE_UNLOAD is not set
# CONFIG_MODVERSIONS is not set
# CONFIG_MODULE_SRCVERSION_ALL is not set
CONFIG_KMOD=y

#
# 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=y
# CONFIG_DEFAULT_AS is not set
# CONFIG_DEFAULT_DEADLINE is not set
CONFIG_DEFAULT_CFQ=y
# CONFIG_DEFAULT_NOOP is not set
CONFIG_DEFAULT_IOSCHED="cfq"

#
# 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 is not set
# CONFIG_MPENTIUMIII is not set
# CONFIG_MPENTIUMM is not set
CONFIG_MPENTIUM4=y
# 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=7
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 is not set
CONFIG_PREEMPT_VOLUNTARY=y
# CONFIG_PREEMPT is not set
# CONFIG_X86_UP_APIC is not set
CONFIG_X86_MCE=y
CONFIG_X86_MCE_NONFATAL=y
# 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_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=y
# CONFIG_EFI is not set
CONFIG_REGPARM=y
# CONFIG_SECCOMP is not set
# CONFIG_HZ_100 is not set
# CONFIG_HZ_250 is not set
CONFIG_HZ_1000=y
CONFIG_HZ=1000
# CONFIG_KEXEC is not set
CONFIG_PHYSICAL_START=0x100000

#
# Power management options (ACPI, APM)
#
CONFIG_PM=y
# CONFIG_PM_LEGACY is not set
# CONFIG_PM_DEBUG is not set
# CONFIG_SOFTWARE_SUSPEND is not set

#
# ACPI (Advanced Configuration and Power Interface) Support
#
CONFIG_ACPI=y
# CONFIG_ACPI_SLEEP is not set
CONFIG_ACPI_AC=y
CONFIG_ACPI_BATTERY=y
CONFIG_ACPI_BUTTON=y
# CONFIG_ACPI_VIDEO is not set
# CONFIG_ACPI_HOTKEY is not set
CONFIG_ACPI_FAN=y
CONFIG_ACPI_PROCESSOR=y
CONFIG_ACPI_THERMAL=y
# CONFIG_ACPI_ASUS is not set
# CONFIG_ACPI_IBM is not set
# CONFIG_ACPI_TOSHIBA is not set
CONFIG_ACPI_BLACKLIST_YEAR=0
# CONFIG_ACPI_DEBUG is not set
CONFIG_ACPI_EC=y
CONFIG_ACPI_POWER=y
CONFIG_ACPI_SYSTEM=y
CONFIG_X86_PM_TIMER=y
# CONFIG_ACPI_CONTAINER is not set

#
# APM (Advanced Power Management) BIOS Support
#
# CONFIG_APM is not set

#
# CPU Frequency scaling
#
CONFIG_CPU_FREQ=y
CONFIG_CPU_FREQ_TABLE=y
# CONFIG_CPU_FREQ_DEBUG is not set
CONFIG_CPU_FREQ_STAT=y
# CONFIG_CPU_FREQ_STAT_DETAILS is not set
CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE=y
# CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE is not set
CONFIG_CPU_FREQ_GOV_PERFORMANCE=y
# CONFIG_CPU_FREQ_GOV_POWERSAVE is not set
CONFIG_CPU_FREQ_GOV_USERSPACE=y
# CONFIG_CPU_FREQ_GOV_ONDEMAND is not set
# CONFIG_CPU_FREQ_GOV_CONSERVATIVE is not set

#
# CPUFreq processor drivers
#
# CONFIG_X86_ACPI_CPUFREQ is not set
# CONFIG_X86_POWERNOW_K6 is not set
# CONFIG_X86_POWERNOW_K7 is not set
# CONFIG_X86_POWERNOW_K8 is not set
# CONFIG_X86_GX_SUSPMOD is not set
# CONFIG_X86_SPEEDSTEP_CENTRINO is not set
# CONFIG_X86_SPEEDSTEP_ICH is not set
# CONFIG_X86_SPEEDSTEP_SMI is not set
CONFIG_X86_P4_CLOCKMOD=y
# CONFIG_X86_CPUFREQ_NFORCE2 is not set
# CONFIG_X86_LONGRUN is not set

#
# shared options
#
CONFIG_X86_SPEEDSTEP_LIB=y

#
# 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_PCI_MMCONFIG=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=y

#
# Networking
#
CONFIG_NET=y

#
# Networking options
#
# CONFIG_NETDEBUG is not set
CONFIG_PACKET=y
# CONFIG_PACKET_MMAP is not set
CONFIG_UNIX=y
CONFIG_XFRM=y
# CONFIG_XFRM_USER is not set
# CONFIG_NET_KEY is not set
CONFIG_INET=y
# CONFIG_IP_MULTICAST is not set
# CONFIG_IP_ADVANCED_ROUTER is not set
CONFIG_IP_FIB_HASH=y
# CONFIG_IP_PNP is not set
# CONFIG_NET_IPIP is not set
# CONFIG_NET_IPGRE 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_XFRM_MODE_TRANSPORT=y
CONFIG_INET_XFRM_MODE_TUNNEL=y
# CONFIG_INET_DIAG is not set
# CONFIG_TCP_CONG_ADVANCED is not set
CONFIG_TCP_CONG_BIC=y
CONFIG_IPV6=y
# CONFIG_IPV6_PRIVACY is not set
# CONFIG_IPV6_ROUTER_PREF is not set
# CONFIG_INET6_AH is not set
# CONFIG_INET6_ESP is not set
# CONFIG_INET6_IPCOMP is not set
# CONFIG_INET6_XFRM_TUNNEL is not set
# CONFIG_INET6_TUNNEL is not set
CONFIG_INET6_XFRM_MODE_TRANSPORT=y
CONFIG_INET6_XFRM_MODE_TUNNEL=y
# CONFIG_IPV6_TUNNEL is not set
# CONFIG_NETWORK_SECMARK 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=y
CONFIG_ATM_CLIP=y
# CONFIG_ATM_CLIP_NO_ICMP is not set
# CONFIG_ATM_LANE is not set
# CONFIG_ATM_BR2684 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=y
CONFIG_FW_LOADER=m
# CONFIG_SYS_HYPERVISOR 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
#
CONFIG_PNP=y
# CONFIG_PNP_DEBUG is not set

#
# Protocols
#
CONFIG_PNPACPI=y

#
# Block devices
#
CONFIG_BLK_DEV_FD=y
# 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=y
# CONFIG_BLK_DEV_CRYPTOLOOP is not set
# CONFIG_BLK_DEV_NBD is not set
# CONFIG_BLK_DEV_SX8 is not set
# CONFIG_BLK_DEV_UB 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 is not set
CONFIG_BLK_DEV_IDECD=y
# CONFIG_BLK_DEV_IDETAPE is not set
# CONFIG_BLK_DEV_IDEFLOPPY is not set
# CONFIG_BLK_DEV_IDESCSI 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_IDEPNP is not set
CONFIG_BLK_DEV_IDEPCI=y
CONFIG_IDEPCI_SHARE_IRQ=y
# 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 is not set
# 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=y
# CONFIG_BLK_DEV_SLC90E66 is not set
# CONFIG_BLK_DEV_TRM290 is not set
# CONFIG_BLK_DEV_VIA82CXXX is not set
# 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=y
CONFIG_SCSI_PROC_FS=y

#
# SCSI support type (disk, tape, CD-ROM)
#
CONFIG_BLK_DEV_SD=y
# CONFIG_CHR_DEV_ST is not set
# CONFIG_CHR_DEV_OSST is not set
# CONFIG_BLK_DEV_SR is not set
CONFIG_CHR_DEV_SG=y
# CONFIG_CHR_DEV_SCH 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 Transport Attributes
#
# CONFIG_SCSI_SPI_ATTRS is not set
# CONFIG_SCSI_FC_ATTRS is not set
# CONFIG_SCSI_ISCSI_ATTRS is not set
# CONFIG_SCSI_SAS_ATTRS is not set

#
# SCSI low-level drivers
#
# CONFIG_ISCSI_TCP is not set
# CONFIG_BLK_DEV_3W_XXXX_RAID is not set
# CONFIG_SCSI_3W_9XXX is not set
# CONFIG_SCSI_ACARD is not set
# CONFIG_SCSI_AACRAID is not set
# CONFIG_SCSI_AIC7XXX is not set
# CONFIG_SCSI_AIC7XXX_OLD is not set
# CONFIG_SCSI_AIC79XX is not set
# CONFIG_SCSI_DPT_I2O is not set
# CONFIG_SCSI_ADVANSYS is not set
# CONFIG_MEGARAID_NEWGEN is not set
# CONFIG_MEGARAID_LEGACY is not set
# CONFIG_MEGARAID_SAS is not set
# CONFIG_SCSI_SATA is not set
# CONFIG_SCSI_HPTIOP is not set
# CONFIG_SCSI_BUSLOGIC is not set
# CONFIG_SCSI_DMX3191D is not set
# CONFIG_SCSI_EATA is not set
# CONFIG_SCSI_FUTURE_DOMAIN is not set
# CONFIG_SCSI_GDTH is not set
# CONFIG_SCSI_IPS is not set
# CONFIG_SCSI_INITIO is not set
# CONFIG_SCSI_INIA100 is not set
# CONFIG_SCSI_SYM53C8XX_2 is not set
# CONFIG_SCSI_IPR is not set
# CONFIG_SCSI_QLOGIC_1280 is not set
# CONFIG_SCSI_QLA_FC is not set
# CONFIG_SCSI_LPFC is not set
# CONFIG_SCSI_DC395x is not set
# CONFIG_SCSI_DC390T is not set
# CONFIG_SCSI_NSP32 is not set
# CONFIG_SCSI_DEBUG is not set

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

#
# Fusion MPT device support
#
# CONFIG_FUSION is not set
# CONFIG_FUSION_SPI is not set
# CONFIG_FUSION_FC is not set
# CONFIG_FUSION_SAS 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=y
# CONFIG_DUMMY is not set
# CONFIG_BONDING is not set
# CONFIG_EQUALIZER is not set
# CONFIG_TUN is not set
# CONFIG_NET_SB1000 is not set

#
# ARCnet devices
#
# CONFIG_ARCNET 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=m
# CONFIG_8139TOO_PIO is not set
# 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 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_MYRI10GE is not set

#
# Token Ring devices
#
# CONFIG_TR is not set

#
# Wireless LAN (non-hamradio)
#
# CONFIG_NET_RADIO is not set

#
# Wan interfaces
#
# CONFIG_WAN is not set

#
# ATM drivers
#
# CONFIG_ATM_DUMMY is not set
# CONFIG_ATM_TCP is not set
# CONFIG_ATM_LANAI is not set
# CONFIG_ATM_ENI is not set
# CONFIG_ATM_FIRESTREAM is not set
# CONFIG_ATM_ZATM is not set
# CONFIG_ATM_NICSTAR is not set
# CONFIG_ATM_IDT77252 is not set
# CONFIG_ATM_AMBASSADOR is not set
# CONFIG_ATM_HORIZON is not set
# CONFIG_ATM_IA is not set
# CONFIG_ATM_FORE200E_MAYBE is not set
# CONFIG_ATM_HE is not set
# CONFIG_FDDI is not set
# CONFIG_HIPPI is not set
CONFIG_PPP=y
# CONFIG_PPP_MULTILINK is not set
# CONFIG_PPP_FILTER is not set
CONFIG_PPP_ASYNC=y
# CONFIG_PPP_SYNC_TTY is not set
CONFIG_PPP_DEFLATE=y
CONFIG_PPP_BSDCOMP=y
# CONFIG_PPP_MPPE is not set
# CONFIG_PPPOE is not set
CONFIG_PPPOATM=y
# CONFIG_SLIP is not set
# CONFIG_NET_FC 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=1280
CONFIG_INPUT_MOUSEDEV_SCREEN_Y=1024
# CONFIG_INPUT_JOYDEV is not set
# CONFIG_INPUT_TSDEV is not set
CONFIG_INPUT_EVDEV=y
# 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 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=y
# CONFIG_COMPUTONE is not set
# CONFIG_ROCKETPORT is not set
# CONFIG_CYCLADES is not set
# CONFIG_DIGIEPCA is not set
# CONFIG_MOXA_INTELLIO is not set
# CONFIG_MOXA_SMARTIO is not set
# CONFIG_ISI is not set
# CONFIG_SYNCLINK is not set
# CONFIG_SYNCLINKMP is not set
# CONFIG_SYNCLINK_GT is not set
CONFIG_N_HDLC=y
# CONFIG_RISCOM8 is not set
# CONFIG_SPECIALIX is not set
# CONFIG_SX is not set
# CONFIG_RIO is not set
# CONFIG_STALDRV is not set

#
# Serial drivers
#
CONFIG_SERIAL_8250=y
# CONFIG_SERIAL_8250_CONSOLE is not set
CONFIG_SERIAL_8250_PCI=y
CONFIG_SERIAL_8250_PNP=y
CONFIG_SERIAL_8250_NR_UARTS=4
CONFIG_SERIAL_8250_RUNTIME_UARTS=4
# CONFIG_SERIAL_8250_EXTENDED is not set

#
# Non-8250 serial port support
#
CONFIG_SERIAL_CORE=y
# 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=y
CONFIG_RTC=y
# 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_HPET 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=y
# CONFIG_I2C_CHARDEV is not set

#
# I2C Algorithms
#
CONFIG_I2C_ALGOBIT=y
# CONFIG_I2C_ALGOPCF is not set
# CONFIG_I2C_ALGOPCA is not set

#
# I2C Hardware Bus support
#
# CONFIG_I2C_ALI1535 is not set
# CONFIG_I2C_ALI1563 is not set
# CONFIG_I2C_ALI15X3 is not set
# CONFIG_I2C_AMD756 is not set
# CONFIG_I2C_AMD8111 is not set
# CONFIG_I2C_I801 is not set
# CONFIG_I2C_I810 is not set
# CONFIG_I2C_PIIX4 is not set
# CONFIG_I2C_NFORCE2 is not set
# CONFIG_I2C_OCORES is not set
# CONFIG_I2C_PARPORT_LIGHT is not set
# CONFIG_I2C_PROSAVAGE is not set
# CONFIG_I2C_SAVAGE4 is not set
# CONFIG_SCx200_ACB is not set
# CONFIG_I2C_SIS5595 is not set
# CONFIG_I2C_SIS630 is not set
# CONFIG_I2C_SIS96X is not set
# CONFIG_I2C_STUB is not set
# CONFIG_I2C_VIA is not set
# CONFIG_I2C_VIAPRO is not set
# CONFIG_I2C_VOODOO3 is not set
# CONFIG_I2C_PCA_ISA is not set

#
# Miscellaneous I2C Chip support
#
# CONFIG_SENSORS_DS1337 is not set
# CONFIG_SENSORS_DS1374 is not set
# CONFIG_SENSORS_EEPROM is not set
# CONFIG_SENSORS_PCF8574 is not set
# CONFIG_SENSORS_PCA9539 is not set
# CONFIG_SENSORS_PCF8591 is not set
# CONFIG_SENSORS_MAX6875 is not set
# CONFIG_I2C_DEBUG_CORE is not set
# CONFIG_I2C_DEBUG_ALGO is not set
# CONFIG_I2C_DEBUG_BUS is not set
# CONFIG_I2C_DEBUG_CHIP 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
# CONFIG_USB_DABUSB is not set

#
# Graphics support
#
CONFIG_FB=y
# CONFIG_FB_CFB_FILLRECT is not set
# CONFIG_FB_CFB_COPYAREA is not set
# CONFIG_FB_CFB_IMAGEBLIT is not set
# CONFIG_FB_MACMODES is not set
CONFIG_FB_FIRMWARE_EDID=y
CONFIG_FB_MODE_HELPERS=y
# CONFIG_FB_TILEBLITTING is not set
# CONFIG_FB_CIRRUS is not set
# CONFIG_FB_PM2 is not set
# CONFIG_FB_CYBER2000 is not set
# CONFIG_FB_ARC is not set
# CONFIG_FB_ASILIANT is not set
# CONFIG_FB_IMSTT is not set
# CONFIG_FB_VGA16 is not set
# CONFIG_FB_VESA is not set
CONFIG_VIDEO_SELECT=y
# CONFIG_FB_HGA is not set
# CONFIG_FB_S1D13XXX is not set
# CONFIG_FB_NVIDIA is not set
# CONFIG_FB_RIVA is not set
# CONFIG_FB_I810 is not set
# CONFIG_FB_INTEL is not set
# CONFIG_FB_MATROX is not set
# CONFIG_FB_RADEON is not set
# CONFIG_FB_ATY128 is not set
# CONFIG_FB_ATY is not set
# CONFIG_FB_SAVAGE is not set
# CONFIG_FB_SIS is not set
# CONFIG_FB_NEOMAGIC is not set
# CONFIG_FB_KYRO is not set
# CONFIG_FB_3DFX is not set
# CONFIG_FB_VOODOO1 is not set
# CONFIG_FB_CYBLA is not set
# CONFIG_FB_TRIDENT is not set
# CONFIG_FB_GEODE is not set
# CONFIG_FB_VIRTUAL is not set

#
# Console display driver support
#
CONFIG_VGA_CONSOLE=y
# CONFIG_VGACON_SOFT_SCROLLBACK is not set
CONFIG_DUMMY_CONSOLE=y
# CONFIG_FRAMEBUFFER_CONSOLE is not set

#
# Logo configuration
#
# CONFIG_LOGO is not set
# CONFIG_BACKLIGHT_LCD_SUPPORT is not set

#
# Sound
#
CONFIG_SOUND=y

#
# Advanced Linux Sound Architecture
#
CONFIG_SND=y
CONFIG_SND_TIMER=y
CONFIG_SND_PCM=y
CONFIG_SND_SEQUENCER=y
# CONFIG_SND_SEQ_DUMMY is not set
CONFIG_SND_OSSEMUL=y
CONFIG_SND_MIXER_OSS=y
CONFIG_SND_PCM_OSS=y
CONFIG_SND_PCM_OSS_PLUGINS=y
CONFIG_SND_SEQUENCER_OSS=y
CONFIG_SND_RTCTIMER=y
CONFIG_SND_SEQ_RTCTIMER_DEFAULT=y
# CONFIG_SND_DYNAMIC_MINORS is not set
# CONFIG_SND_SUPPORT_OLD_API is not set
# CONFIG_SND_VERBOSE_PROCFS is not set
# CONFIG_SND_VERBOSE_PRINTK is not set
# CONFIG_SND_DEBUG is not set

#
# Generic devices
#
CONFIG_SND_AC97_CODEC=y
CONFIG_SND_AC97_BUS=y
# CONFIG_SND_DUMMY is not set
# CONFIG_SND_VIRMIDI is not set
# CONFIG_SND_MTPAV is not set
# CONFIG_SND_SERIAL_U16550 is not set
# CONFIG_SND_MPU401 is not set

#
# PCI devices
#
# CONFIG_SND_AD1889 is not set
# CONFIG_SND_ALS300 is not set
# CONFIG_SND_ALS4000 is not set
# CONFIG_SND_ALI5451 is not set
# CONFIG_SND_ATIIXP is not set
# CONFIG_SND_ATIIXP_MODEM is not set
# CONFIG_SND_AU8810 is not set
# CONFIG_SND_AU8820 is not set
# CONFIG_SND_AU8830 is not set
# CONFIG_SND_AZT3328 is not set
# CONFIG_SND_BT87X is not set
# CONFIG_SND_CA0106 is not set
# CONFIG_SND_CMIPCI is not set
# CONFIG_SND_CS4281 is not set
# CONFIG_SND_CS46XX is not set
# CONFIG_SND_CS5535AUDIO is not set
# CONFIG_SND_EMU10K1 is not set
# CONFIG_SND_EMU10K1X is not set
# CONFIG_SND_ENS1370 is not set
# CONFIG_SND_ENS1371 is not set
# CONFIG_SND_ES1938 is not set
# CONFIG_SND_ES1968 is not set
# CONFIG_SND_FM801 is not set
# CONFIG_SND_HDA_INTEL is not set
# CONFIG_SND_HDSP is not set
# CONFIG_SND_HDSPM is not set
# CONFIG_SND_ICE1712 is not set
# CONFIG_SND_ICE1724 is not set
CONFIG_SND_INTEL8X0=y
# CONFIG_SND_INTEL8X0M is not set
# CONFIG_SND_KORG1212 is not set
# CONFIG_SND_MAESTRO3 is not set
# CONFIG_SND_MIXART is not set
# CONFIG_SND_NM256 is not set
# CONFIG_SND_PCXHR is not set
# CONFIG_SND_RIPTIDE is not set
# CONFIG_SND_RME32 is not set
# CONFIG_SND_RME96 is not set
# CONFIG_SND_RME9652 is not set
# CONFIG_SND_SONICVIBES is not set
# CONFIG_SND_TRIDENT is not set
# CONFIG_SND_VIA82XX is not set
# CONFIG_SND_VIA82XX_MODEM is not set
# CONFIG_SND_VX222 is not set
# CONFIG_SND_YMFPCI is not set

#
# USB devices
#
# CONFIG_SND_USB_AUDIO is not set
# CONFIG_SND_USB_USX2Y is not set

#
# Open Sound System
#
# CONFIG_SOUND_PRIME 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=y
# CONFIG_USB_DEBUG is not set

#
# Miscellaneous USB options
#
CONFIG_USB_DEVICEFS=y
# CONFIG_USB_BANDWIDTH is not set
# CONFIG_USB_DYNAMIC_MINORS is not set
# CONFIG_USB_SUSPEND is not set
# CONFIG_USB_OTG is not set

#
# USB Host Controller Drivers
#
CONFIG_USB_EHCI_HCD=y
# CONFIG_USB_EHCI_SPLIT_ISO is not set
# CONFIG_USB_EHCI_ROOT_HUB_TT is not set
# CONFIG_USB_EHCI_TT_NEWSCHED is not set
# CONFIG_USB_ISP116X_HCD is not set
CONFIG_USB_OHCI_HCD=y
# CONFIG_USB_OHCI_BIG_ENDIAN is not set
CONFIG_USB_OHCI_LITTLE_ENDIAN=y
# CONFIG_USB_UHCI_HCD is not set
# CONFIG_USB_SL811_HCD is not set

#
# USB Device Class drivers
#
# CONFIG_USB_ACM is not set
CONFIG_USB_PRINTER=m

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

#
# may also be needed; see USB_STORAGE Help for more information
#
CONFIG_USB_STORAGE=y
# CONFIG_USB_STORAGE_DEBUG is not set
# CONFIG_USB_STORAGE_DATAFAB is not set
# CONFIG_USB_STORAGE_FREECOM is not set
# CONFIG_USB_STORAGE_ISD200 is not set
# CONFIG_USB_STORAGE_DPCM is not set
# CONFIG_USB_STORAGE_USBAT is not set
# CONFIG_USB_STORAGE_SDDR09 is not set
# CONFIG_USB_STORAGE_SDDR55 is not set
# CONFIG_USB_STORAGE_JUMPSHOT is not set
# CONFIG_USB_STORAGE_ALAUDA is not set
# CONFIG_USB_LIBUSUAL is not set

#
# USB Input Devices
#
# CONFIG_USB_HID is not set

#
# USB HID Boot Protocol drivers
#
# CONFIG_USB_KBD is not set
# CONFIG_USB_MOUSE is not set
# CONFIG_USB_AIPTEK is not set
# CONFIG_USB_WACOM is not set
# CONFIG_USB_ACECAD is not set
# CONFIG_USB_KBTAB is not set
# CONFIG_USB_POWERMATE is not set
# CONFIG_USB_TOUCHSCREEN is not set
# CONFIG_USB_YEALINK is not set
# CONFIG_USB_XPAD is not set
# CONFIG_USB_ATI_REMOTE is not set
# CONFIG_USB_ATI_REMOTE2 is not set
# CONFIG_USB_KEYSPAN_REMOTE is not set
# CONFIG_USB_APPLETOUCH is not set

#
# USB Imaging devices
#
# CONFIG_USB_MDC800 is not set
# CONFIG_USB_MICROTEK is not set

#
# USB Network Adapters
#
# CONFIG_USB_CATC is not set
# CONFIG_USB_KAWETH is not set
# CONFIG_USB_PEGASUS is not set
# CONFIG_USB_RTL8150 is not set
# CONFIG_USB_USBNET is not set
# CONFIG_USB_MON is not set

#
# USB port drivers
#

#
# USB Serial Converter support
#
# CONFIG_USB_SERIAL is not set

#
# USB Miscellaneous drivers
#
# CONFIG_USB_EMI62 is not set
# CONFIG_USB_EMI26 is not set
# CONFIG_USB_AUERSWALD is not set
# CONFIG_USB_RIO500 is not set
# CONFIG_USB_LEGOTOWER is not set
# CONFIG_USB_LCD is not set
# CONFIG_USB_LED is not set
# CONFIG_USB_CY7C63 is not set
# CONFIG_USB_CYTHERM is not set
# CONFIG_USB_PHIDGETKIT is not set
# CONFIG_USB_PHIDGETSERVO is not set
# CONFIG_USB_IDMOUSE is not set
# CONFIG_USB_APPLEDISPLAY is not set
# CONFIG_USB_SISUSBVGA is not set
# CONFIG_USB_LD is not set
# CONFIG_USB_TEST is not set

#
# USB DSL modem support
#
CONFIG_USB_ATM=m
CONFIG_USB_SPEEDTOUCH=m
# CONFIG_USB_CXACRU is not set
# CONFIG_USB_UEAGLEATM is not set
# CONFIG_USB_XUSBATM is not set

#
# 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

#
# DMA Engine support
#
# CONFIG_DMA_ENGINE is not set

#
# DMA Clients
#

#
# DMA Devices
#

#
# File systems
#
CONFIG_EXT2_FS=y
# CONFIG_EXT2_FS_XATTR is not set
# CONFIG_EXT2_FS_XIP is not set
# CONFIG_EXT3_FS 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=y
CONFIG_INOTIFY_USER=y
# 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=y
CONFIG_JOLIET=y
# CONFIG_ZISOFS is not set
CONFIG_UDF_FS=y
CONFIG_UDF_NLS=y

#
# DOS/FAT/NT Filesystems
#
CONFIG_FAT_FS=y
# CONFIG_MSDOS_FS is not set
CONFIG_VFAT_FS=y
CONFIG_FAT_DEFAULT_CODEPAGE=850
CONFIG_FAT_DEFAULT_IOCHARSET="iso8859-1"
CONFIG_NTFS_FS=y
# CONFIG_NTFS_DEBUG is not set
# CONFIG_NTFS_RW is not set

#
# Pseudo filesystems
#
CONFIG_PROC_FS=y
CONFIG_PROC_KCORE=y
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=y
CONFIG_NLS_DEFAULT="iso8859-1"
CONFIG_NLS_CODEPAGE_437=y
# CONFIG_NLS_CODEPAGE_737 is not set
# CONFIG_NLS_CODEPAGE_775 is not set
CONFIG_NLS_CODEPAGE_850=y
# 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_936 is not set
# CONFIG_NLS_CODEPAGE_950 is not set
# CONFIG_NLS_CODEPAGE_932 is not set
# CONFIG_NLS_CODEPAGE_949 is not set
# CONFIG_NLS_CODEPAGE_874 is not set
# CONFIG_NLS_ISO8859_8 is not set
# CONFIG_NLS_CODEPAGE_1250 is not set
# CONFIG_NLS_CODEPAGE_1251 is not set
# CONFIG_NLS_ASCII is not set
CONFIG_NLS_ISO8859_1=y
# CONFIG_NLS_ISO8859_2 is not set
# 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_9 is not set
# CONFIG_NLS_ISO8859_13 is not set
# CONFIG_NLS_ISO8859_14 is not set
CONFIG_NLS_ISO8859_15=y
# CONFIG_NLS_KOI8_R is not set
# CONFIG_NLS_KOI8_U is not set
CONFIG_NLS_UTF8=y

#
# Instrumentation Support
#
# CONFIG_PROFILING is not set
# CONFIG_KPROBES 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=y
# CONFIG_DEBUG_FS is not set
# CONFIG_UNWIND_INFO is not set
CONFIG_EARLY_PRINTK=y
CONFIG_STACK_BACKTRACE_COLS=2
CONFIG_DOUBLEFAULT=y

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

#
# Cryptographic options
#
CONFIG_CRYPTO=y
# CONFIG_CRYPTO_HMAC is not set
# CONFIG_CRYPTO_NULL is not set
# CONFIG_CRYPTO_MD4 is not set
# CONFIG_CRYPTO_MD5 is not set
# CONFIG_CRYPTO_SHA1 is not set
# CONFIG_CRYPTO_SHA256 is not set
# CONFIG_CRYPTO_SHA512 is not set
# CONFIG_CRYPTO_WP512 is not set
# CONFIG_CRYPTO_TGR192 is not set
# CONFIG_CRYPTO_DES is not set
# CONFIG_CRYPTO_BLOWFISH is not set
# CONFIG_CRYPTO_TWOFISH is not set
# CONFIG_CRYPTO_SERPENT is not set
CONFIG_CRYPTO_AES=y
# CONFIG_CRYPTO_AES_586 is not set
# CONFIG_CRYPTO_CAST5 is not set
# CONFIG_CRYPTO_CAST6 is not set
# CONFIG_CRYPTO_TEA is not set
CONFIG_CRYPTO_ARC4=y
# CONFIG_CRYPTO_KHAZAD is not set
# CONFIG_CRYPTO_ANUBIS is not set
# CONFIG_CRYPTO_DEFLATE is not set
CONFIG_CRYPTO_MICHAEL_MIC=y
# CONFIG_CRYPTO_CRC32C is not set
# CONFIG_CRYPTO_TEST is not set

#
# Hardware crypto devices
#
# CONFIG_CRYPTO_DEV_PADLOCK is not set

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

[-- Attachment #3: lspci --]
[-- Type: text/plain, Size: 4403 bytes --]

00:00.0 Host bridge: Silicon Integrated Systems [SiS] SiS645DX Host & Memory & AGP Controller (rev 01)
	Subsystem: CLEVO/KAPOK Computer: Unknown device 0403
	Flags: bus master, medium devsel, latency 64
	Memory at e8000000 (32-bit, non-prefetchable) [size=64M]
	Capabilities: [c0] AGP version 2.0

00:01.0 PCI bridge: Silicon Integrated Systems [SiS] 5591/5592 AGP (prog-if 00 [Normal decode])
	Flags: bus master, fast devsel, latency 99
	Bus: primary=00, secondary=01, subordinate=01, sec-latency=68
	I/O behind bridge: 00009000-00009fff
	Memory behind bridge: ec100000-ec1fffff
	Prefetchable memory behind bridge: f0000000-f7ffffff

00:02.0 ISA bridge: Silicon Integrated Systems [SiS] SiS962 [MuTIOL Media IO] (rev 14)
	Flags: bus master, medium devsel, latency 0

00:02.1 SMBus: Silicon Integrated Systems [SiS]: Unknown device 0016
	Flags: medium devsel
	I/O ports at 8100 [size=32]

00:02.3 FireWire (IEEE 1394): Silicon Integrated Systems [SiS] FireWire Controller (prog-if 10 [OHCI])
	Subsystem: CLEVO/KAPOK Computer: Unknown device 0403
	Flags: bus master, medium devsel, latency 64, IRQ 9
	Memory at ec000000 (32-bit, non-prefetchable) [size=4K]
	Expansion ROM at 34000000 [disabled] [size=128K]
	Capabilities: [64] Power Management version 2

00:02.5 IDE interface: Silicon Integrated Systems [SiS] 5513 [IDE] (prog-if 80 [Master])
	Subsystem: CLEVO/KAPOK Computer: Unknown device 0403
	Flags: bus master, medium devsel, latency 128, IRQ 11
	I/O ports at 1000 [size=16]

00:02.7 Multimedia audio controller: Silicon Integrated Systems [SiS] SiS7012 PCI Audio Accelerator (rev a0)
	Subsystem: CLEVO/KAPOK Computer: Unknown device 0403
	Flags: bus master, medium devsel, latency 173, IRQ 5
	I/O ports at 1400 [size=256]
	I/O ports at 1080 [size=128]
	Capabilities: [48] Power Management version 2

00:03.0 USB Controller: Silicon Integrated Systems [SiS] 7001 (rev 0f) (prog-if 10 [OHCI])
	Subsystem: CLEVO/KAPOK Computer: Unknown device 0403
	Flags: bus master, medium devsel, latency 64, IRQ 11
	Memory at ec001000 (32-bit, non-prefetchable) [size=4K]
	Capabilities: [dc] Power Management version 2

00:03.1 USB Controller: Silicon Integrated Systems [SiS] 7001 (rev 0f) (prog-if 10 [OHCI])
	Subsystem: CLEVO/KAPOK Computer: Unknown device 0403
	Flags: bus master, medium devsel, latency 64, IRQ 9
	Memory at ec002000 (32-bit, non-prefetchable) [size=4K]
	Capabilities: [dc] Power Management version 2

00:03.2 USB Controller: Silicon Integrated Systems [SiS] 7001 (rev 0f) (prog-if 10 [OHCI])
	Subsystem: CLEVO/KAPOK Computer: Unknown device 0403
	Flags: bus master, medium devsel, latency 64, IRQ 9
	Memory at ec003000 (32-bit, non-prefetchable) [size=4K]
	Capabilities: [dc] Power Management version 2

00:03.3 USB Controller: Silicon Integrated Systems [SiS] SiS7002 USB 2.0 (prog-if 20 [EHCI])
	Subsystem: CLEVO/KAPOK Computer: Unknown device 0403
	Flags: bus master, medium devsel, latency 64, IRQ 9
	Memory at ec004000 (32-bit, non-prefetchable) [size=4K]
	Capabilities: [50] Power Management version 2

00:0a.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+ (rev 10)
	Subsystem: CLEVO/KAPOK Computer: Unknown device 0400
	Flags: bus master, medium devsel, latency 64, IRQ 11
	I/O ports at 1800 [size=256]
	Memory at ec005000 (32-bit, non-prefetchable) [size=256]
	Capabilities: [50] Power Management version 2

00:0c.0 CardBus bridge: ENE Technology Inc CB1410 Cardbus Controller
	Subsystem: CLEVO/KAPOK Computer: Unknown device 0403
	Flags: bus master, medium devsel, latency 64, IRQ 5
	Memory at 34020000 (32-bit, non-prefetchable) [size=4K]
	Bus: primary=00, secondary=02, subordinate=05, sec-latency=176
	Memory window 0: 30000000-31fff000 (prefetchable)
	Memory window 1: 32000000-33fff000 (prefetchable)
	I/O window 0: 00001c00-00001cff
	I/O window 1: 00002000-000020ff
	16-bit legacy interface ports at 0001

01:00.0 VGA compatible controller: ATI Technologies Inc Radeon R250 Lf [Radeon Mobility 9000] (rev 01) (prog-if 00 [VGA])
	Subsystem: CLEVO/KAPOK Computer: Unknown device 0403
	Flags: bus master, stepping, fast Back2Back, 66Mhz, medium devsel, latency 66, IRQ 11
	Memory at f0000000 (32-bit, prefetchable) [size=128M]
	I/O ports at 9000 [size=256]
	Memory at ec100000 (32-bit, non-prefetchable) [size=64K]
	Expansion ROM at ec120000 [disabled] [size=128K]
	Capabilities: [58] AGP version 2.0
	Capabilities: [50] Power Management version 2


^ permalink raw reply	[flat|nested] 15+ messages in thread

* Re: File corruption when using kernels 2.6.18+
  2007-10-02 21:05   ` Neil Romig
@ 2007-10-03  5:18     ` Pekka Enberg
  2007-10-03 18:42       ` Neil Romig
  0 siblings, 1 reply; 15+ messages in thread
From: Pekka Enberg @ 2007-10-03  5:18 UTC (permalink / raw)
  To: Neil Romig; +Cc: linux-kernel, hyoshiok

Hi Neil,

On 10/3/07, Neil Romig <neil@romig.demon.co.uk> wrote:
> Thanks for your help on this. I have narrowed it down to commit
> "c22ce143d15eb288543fe9873e1c5ac1c01b69a1 x86: cache pollution aware
> __copy_from_user_ll()". This fits with the errors I'm getting, so now I need
> to find out if I can safely ignore this patch, or does it have to be modified?
> This is my first Linux bug in many years of simply using it, so I'm a little
> nervous!

Just to make sure, if you disable CONFIG_X86_INTEL_USERCOPY, the
corruption goes away?

^ permalink raw reply	[flat|nested] 15+ messages in thread

* Re: File corruption when using kernels 2.6.18+
  2007-10-03  5:18     ` Pekka Enberg
@ 2007-10-03 18:42       ` Neil Romig
  2007-10-03 18:48         ` Pekka Enberg
  0 siblings, 1 reply; 15+ messages in thread
From: Neil Romig @ 2007-10-03 18:42 UTC (permalink / raw)
  To: Pekka Enberg; +Cc: linux-kernel, hyoshiok

Pekka Enberg wrote:
> Hi Neil,
> 
> On 10/3/07, Neil Romig <neil@romig.demon.co.uk> wrote:
>> Thanks for your help on this. I have narrowed it down to commit
>> "c22ce143d15eb288543fe9873e1c5ac1c01b69a1 x86: cache pollution aware
>> __copy_from_user_ll()". This fits with the errors I'm getting, so now I need
>> to find out if I can safely ignore this patch, or does it have to be modified?
>> This is my first Linux bug in many years of simply using it, so I'm a little
>> nervous!
> 
> Just to make sure, if you disable CONFIG_X86_INTEL_USERCOPY, the
> corruption goes away?
> 
It took some fiddling to disable (edit arch/i386/Kconfig.cpu) but that has fixed it. Many thanks!

Does this need to be reported as a bug? Or should the kernel config scripts be changed to enable this option to be easily turned off?

Neil.

^ permalink raw reply	[flat|nested] 15+ messages in thread

* Re: File corruption when using kernels 2.6.18+
  2007-10-03 18:42       ` Neil Romig
@ 2007-10-03 18:48         ` Pekka Enberg
  2007-10-03 19:22           ` Linus Torvalds
  0 siblings, 1 reply; 15+ messages in thread
From: Pekka Enberg @ 2007-10-03 18:48 UTC (permalink / raw)
  To: Neil Romig; +Cc: linux-kernel, hyoshiok, Andrew Morton, Linus Torvalds

Hi Neil,

On 10/3/07, Neil Romig <neil@romig.demon.co.uk> wrote:
> > > Thanks for your help on this. I have narrowed it down to commit
> > > "c22ce143d15eb288543fe9873e1c5ac1c01b69a1 x86: cache pollution aware
> > > __copy_from_user_ll()". This fits with the errors I'm getting, so now I need
> > > to find out if I can safely ignore this patch, or does it have to be modified?
> > > This is my first Linux bug in many years of simply using it, so I'm a little
> > > nervous!

A some point in time, I wrote:
> > Just to make sure, if you disable CONFIG_X86_INTEL_USERCOPY, the
> > corruption goes away?

On 10/3/07, Neil Romig <neil@romig.demon.co.uk> wrote:
> It took some fiddling to disable (edit arch/i386/Kconfig.cpu) but that has fixed it.
> Many thanks!
>
> Does this need to be reported as a bug? Or should the kernel config scripts be
> changed to enable this option to be easily turned off?

Looks like a bug to me. Can we have your /proc/cpuinfo too?

                              Pekka

^ permalink raw reply	[flat|nested] 15+ messages in thread

* Re: File corruption when using kernels 2.6.18+
  2007-10-03 18:48         ` Pekka Enberg
@ 2007-10-03 19:22           ` Linus Torvalds
  2007-10-03 19:35             ` Pekka Enberg
  0 siblings, 1 reply; 15+ messages in thread
From: Linus Torvalds @ 2007-10-03 19:22 UTC (permalink / raw)
  To: Pekka Enberg; +Cc: Neil Romig, linux-kernel, hyoshiok, Andrew Morton

On Wed, 3 Oct 2007, Pekka Enberg wrote:

> Hi Neil,
> 
> On 10/3/07, Neil Romig <neil@romig.demon.co.uk> wrote:
> > > > Thanks for your help on this. I have narrowed it down to commit
> > > > "c22ce143d15eb288543fe9873e1c5ac1c01b69a1 x86: cache pollution aware
> > > > __copy_from_user_ll()". This fits with the errors I'm getting, so now I need
> > > > to find out if I can safely ignore this patch, or does it have to be modified?
> > > > This is my first Linux bug in many years of simply using it, so I'm a little
> > > > nervous!
> 
> A some point in time, I wrote:
> > > Just to make sure, if you disable CONFIG_X86_INTEL_USERCOPY, the
> > > corruption goes away?
> 
> On 10/3/07, Neil Romig <neil@romig.demon.co.uk> wrote:
> > It took some fiddling to disable (edit arch/i386/Kconfig.cpu) but that has fixed it.
> > Many thanks!
> >
> > Does this need to be reported as a bug? Or should the kernel config scripts be
> > changed to enable this option to be easily turned off?
> 
> Looks like a bug to me. Can we have your /proc/cpuinfo too?

I doubt it's a CPU bug. It's more likely a chipset or motherboard bug 
around the CPU. The patterns for the original "cp" corruption that Neil 
posted seem to be:

	   File offset		correct		corrupt
	 decimal      hex
	======== ========
	  642470 0009cda6	'm' 0x6D	'o' 0x6f
	  972198 000ed5a6	'i' 0x69	'a' 0x61
	 1243686 0012fa26	's' 0x73	'c' 0x63
	 1676846 0019962e	't' 0x74	'`' 0x64
	 1907974 001d1d06	' ' 0x20	'(' 0x28
	...

and since it's apparently about using the uncached accesses, it's 
interesting that the low three bits are identical in all those corruptions 
(they also seem to be single-bit errors in the actual byte-value, although 
the bit is not the same). If the external bus is 64 bits (?), that would 
say that it's one particular byte lane that is dodgy.

I would bet that the reason the intel-optimized memcpy triggers this is 
that the non-temporal stores just means that you go out directly on the 
bus, and it probably just shows a weakness in the chipset or bus that 
doesn't show with the normal cacheline accesses.

			Linus

^ permalink raw reply	[flat|nested] 15+ messages in thread

* Re: File corruption when using kernels 2.6.18+
  2007-10-03 19:22           ` Linus Torvalds
@ 2007-10-03 19:35             ` Pekka Enberg
  2007-10-03 19:54               ` Linus Torvalds
  2007-10-03 20:30               ` Alan Cox
  0 siblings, 2 replies; 15+ messages in thread
From: Pekka Enberg @ 2007-10-03 19:35 UTC (permalink / raw)
  To: Linus Torvalds; +Cc: Neil Romig, linux-kernel, hyoshiok, Andrew Morton

Hi Linus,

On 10/3/07, Linus Torvalds <torvalds@linux-foundation.org> wrote:
> I would bet that the reason the intel-optimized memcpy triggers this is
> that the non-temporal stores just means that you go out directly on the
> bus, and it probably just shows a weakness in the chipset or bus that
> doesn't show with the normal cacheline accesses.

But that should show up with memtest too, no?

                             Pekka

^ permalink raw reply	[flat|nested] 15+ messages in thread

* Re: File corruption when using kernels 2.6.18+
  2007-10-03 19:35             ` Pekka Enberg
@ 2007-10-03 19:54               ` Linus Torvalds
  2007-10-04  1:11                 ` Hiro Yoshioka
  2007-10-03 20:30               ` Alan Cox
  1 sibling, 1 reply; 15+ messages in thread
From: Linus Torvalds @ 2007-10-03 19:54 UTC (permalink / raw)
  To: Pekka Enberg; +Cc: Neil Romig, linux-kernel, hyoshiok, Andrew Morton

On Wed, 3 Oct 2007, Pekka Enberg wrote:
> 
> On 10/3/07, Linus Torvalds <torvalds@linux-foundation.org> wrote:
> > I would bet that the reason the intel-optimized memcpy triggers this is
> > that the non-temporal stores just means that you go out directly on the
> > bus, and it probably just shows a weakness in the chipset or bus that
> > doesn't show with the normal cacheline accesses.
> 
> But that should show up with memtest too, no?

Not unless memtest uses non-temporal stores with the same (or similar) 
access patterns.

The thing is, the CPU cache hides a *lot* of activity from the chipset, 
and changes the access patterns radically. 

With normal cached accesses, you'd normally see just the "fill cacheline" 
and "write out cacheline" pattern. With movnt, you'd see non-cacheline 
accesses to memory. If the chipset was tested under mostly normal loads, 
the movnt cases have been getting a lot less coverage.

Now, I do agree that it certainly *can* be a CPU bug too.  I doubt it, 
though. 

I'd check the power supply (brownouts cause random corruption, and it 
might have a "peak power pattern" thing to it), and it's worth re-seating 
any DIMM's etc. And it's definitely worth going into the BIOS setup screen 
and making sure that nothing is even close to debatable (ie take RAM 
timings down to non-aggressive levels, make sure bus frequencies and 
multipliers are not even close to borderline, etc etc).

			Linus

^ permalink raw reply	[flat|nested] 15+ messages in thread

* Re: File corruption when using kernels 2.6.18+
  2007-10-03 19:54               ` Linus Torvalds
@ 2007-10-04  1:11                 ` Hiro Yoshioka
  0 siblings, 0 replies; 15+ messages in thread
From: Hiro Yoshioka @ 2007-10-04  1:11 UTC (permalink / raw)
  To: torvalds; +Cc: penberg, neil, linux-kernel, akpm, hyoshiok

Hi,

From: Linus Torvalds <torvalds@linux-foundation.org>
> On Wed, 3 Oct 2007, Pekka Enberg wrote:
> > 
> > On 10/3/07, Linus Torvalds <torvalds@linux-foundation.org> wrote:
> > > I would bet that the reason the intel-optimized memcpy triggers this is
> > > that the non-temporal stores just means that you go out directly on the
> > > bus, and it probably just shows a weakness in the chipset or bus that
> > > doesn't show with the normal cacheline accesses.
> > 
> > But that should show up with memtest too, no?
> 
> Not unless memtest uses non-temporal stores with the same (or similar) 
> access patterns.
> 
> The thing is, the CPU cache hides a *lot* of activity from the chipset, 
> and changes the access patterns radically. 
> 
> With normal cached accesses, you'd normally see just the "fill cacheline" 
> and "write out cacheline" pattern. With movnt, you'd see non-cacheline 
> accesses to memory. If the chipset was tested under mostly normal loads, 
> the movnt cases have been getting a lot less coverage.

I'm not so sure whether it is chipset's bug or not.

The movnt does have the WC (write combining) semantics and
bypass the hardware cache to store the data.

http://www.intel.com/products/processor/manuals/index.htm

Intel 64 and IA-32 Architectures Software Developer's Manual
Volume 1: Basic Architecture

Intel 64 and IA-32 Architectures Software Developer's Manual
Volume 3A: System Programming Guide

Thanks in advance,
  Hiro

^ permalink raw reply	[flat|nested] 15+ messages in thread

* Re: File corruption when using kernels 2.6.18+
  2007-10-03 19:35             ` Pekka Enberg
  2007-10-03 19:54               ` Linus Torvalds
@ 2007-10-03 20:30               ` Alan Cox
  2007-10-04 18:34                 ` Neil Romig
  1 sibling, 1 reply; 15+ messages in thread
From: Alan Cox @ 2007-10-03 20:30 UTC (permalink / raw)
  To: Pekka Enberg
  Cc: Linus Torvalds, Neil Romig, linux-kernel, hyoshiok, Andrew Morton

On Wed, 3 Oct 2007 22:35:24 +0300
"Pekka Enberg" <penberg@cs.helsinki.fi> wrote:

> Hi Linus,
> 
> On 10/3/07, Linus Torvalds <torvalds@linux-foundation.org> wrote:
> > I would bet that the reason the intel-optimized memcpy triggers this is
> > that the non-temporal stores just means that you go out directly on the
> > bus, and it probably just shows a weakness in the chipset or bus that
> > doesn't show with the normal cacheline accesses.
> 
> But that should show up with memtest too, no?

Not neccessarily. The old VIA memory copying bug only showed up with
prefetching and mmx store patterns. That was a hardware flaw that took
extreme memory utilisation to show up - so it does occur but thats not to
say it is the cause

Alan

^ permalink raw reply	[flat|nested] 15+ messages in thread

* Re: File corruption when using kernels 2.6.18+
  2007-10-03 20:30               ` Alan Cox
@ 2007-10-04 18:34                 ` Neil Romig
  0 siblings, 0 replies; 15+ messages in thread
From: Neil Romig @ 2007-10-04 18:34 UTC (permalink / raw)
  To: Alan Cox
  Cc: Pekka Enberg, Linus Torvalds, linux-kernel, hyoshiok,
	Andrew Morton

[-- Attachment #1: Type: text/plain, Size: 1189 bytes --]

Alan Cox wrote:
> On Wed, 3 Oct 2007 22:35:24 +0300
> "Pekka Enberg" <penberg@cs.helsinki.fi> wrote:
> 
>> Hi Linus,
>>
>> On 10/3/07, Linus Torvalds <torvalds@linux-foundation.org> wrote:
>>> I would bet that the reason the intel-optimized memcpy triggers this is
>>> that the non-temporal stores just means that you go out directly on the
>>> bus, and it probably just shows a weakness in the chipset or bus that
>>> doesn't show with the normal cacheline accesses.
>> But that should show up with memtest too, no?
> 
> Not neccessarily. The old VIA memory copying bug only showed up with
> prefetching and mmx store patterns. That was a hardware flaw that took
> extreme memory utilisation to show up - so it does occur but thats not to
> say it is the cause
> 
> Alan
> 
This is way out of my depth, but I have re-seated my 2x256MB DDR single sided DIMMS and checked my BIOS, though the Phoenix BIOS in 
my rebadged CLEVO D400E doesn't allow any tampering with timings, and recompiled with the USERCOPY enabled but still get the bit 
corruption.
Since I seem to be alone in getting this effect perhaps my machine is dodgy? I've attached my dmesg output if that's of any help.

Neil.



[-- Attachment #2: dmesg.txt --]
[-- Type: text/plain, Size: 12060 bytes --]

Linux version 2.6.22.9 (root@romig) (gcc version 3.4.3) #1 Wed Oct 3 19:14:10 BST 2007
BIOS-provided physical RAM map:
 BIOS-e820: 0000000000000000 - 000000000009f400 (usable)
 BIOS-e820: 000000000009f400 - 00000000000a0000 (reserved)
 BIOS-e820: 00000000000d0000 - 00000000000d8000 (reserved)
 BIOS-e820: 00000000000e4000 - 0000000000100000 (reserved)
 BIOS-e820: 0000000000100000 - 000000001fdf0000 (usable)
 BIOS-e820: 000000001fdf0000 - 000000001fdfb000 (ACPI data)
 BIOS-e820: 000000001fdfb000 - 000000001fe00000 (ACPI NVS)
 BIOS-e820: 000000001fe00000 - 0000000020000000 (reserved)
 BIOS-e820: 00000000fec00000 - 00000000fec10000 (reserved)
 BIOS-e820: 00000000fee00000 - 00000000fee01000 (reserved)
 BIOS-e820: 00000000fff80000 - 0000000100000000 (reserved)
509MB LOWMEM available.
Entering add_active_range(0, 0, 130544) 0 entries of 256 used
Zone PFN ranges:
  DMA             0 ->     4096
  Normal       4096 ->   130544
early_node_map[1] active PFN ranges
    0:        0 ->   130544
On node 0 totalpages: 130544
  DMA zone: 32 pages used for memmap
  DMA zone: 0 pages reserved
  DMA zone: 4064 pages, LIFO batch:0
  Normal zone: 987 pages used for memmap
  Normal zone: 125461 pages, LIFO batch:31
DMI 2.3 present.
ACPI: RSDP 000F72D0, 0014 (r0 PTLTD )
ACPI: RSDT 1FDF79CA, 0028 (r1 PTLTD    RSDT    6040000  LTP        0)
ACPI: FACP 1FDFAF8C, 0074 (r1 SiS    M650      6040000 PTL     F4240)
ACPI: DSDT 1FDF79F2, 359A (r1 Clevo      650M  6040000 MSFT  100000D)
ACPI: FACS 1FDFBFC0, 0040
ACPI: PM-Timer IO Port: 0x8008
Allocating PCI resources starting at 30000000 (gap: 20000000:dec00000)
Built 1 zonelists.  Total pages: 129525
Kernel command line: root=/dev/sda6 vga=778
Enabling fast FPU save and restore... done.
Enabling unmasked SIMD FPU exception support... done.
Initializing CPU#0
PID hash table entries: 2048 (order: 11, 8192 bytes)
Detected 2666.381 MHz processor.
Console: colour VGA+ 132x43
Dentry cache hash table entries: 65536 (order: 6, 262144 bytes)
Inode-cache hash table entries: 32768 (order: 5, 131072 bytes)
Memory: 514160k/522176k available (1982k kernel code, 7464k reserved, 710k data, 136k init, 0k highmem)
virtual kernel memory layout:
    fixmap  : 0xffff8000 - 0xfffff000   (  28 kB)
    vmalloc : 0xe0800000 - 0xffff6000   ( 503 MB)
    lowmem  : 0xc0000000 - 0xdfdf0000   ( 509 MB)
      .init : 0xc03a4000 - 0xc03c6000   ( 136 kB)
      .data : 0xc02efab4 - 0xc03a168c   ( 710 kB)
      .text : 0xc0100000 - 0xc02efab4   (1982 kB)
Checking if this processor honours the WP bit even in supervisor mode... Ok.
Calibrating delay using timer specific routine.. 5334.34 BogoMIPS (lpj=2667171)
Mount-cache hash table entries: 512
CPU: After generic identify, caps: bfebf9ff 00000000 00000000 00000000 00004400 00000000 00000000
CPU: Trace cache: 12K uops, L1 D cache: 8K
CPU: L2 cache: 512K
CPU: After all inits, caps: bfebf9ff 00000000 00000000 0000b080 00004400 00000000 00000000
Compat vDSO mapped to ffffe000.
CPU: Intel Genuine Intel(R) CPU 2.66GHz stepping 09
Checking 'hlt' instruction... OK.
ACPI: Core revision 20070126
ACPI: setting ELCR to 0800 (from 0a20)
NET: Registered protocol family 16
ACPI: bus type pci registered
PCI: PCI BIOS revision 2.10 entry at 0xfd9c8, last bus=1
PCI: Using configuration type 1
Setting up standard PCI resources
ACPI: Interpreter enabled
ACPI: Using PIC for interrupt routing
ACPI: PCI Root Bridge [PCI0] (0000:00)
PCI: Probing PCI hardware (bus 00)
Enabling SiS 96x SMBus.
ACPI: PCI Interrupt Routing Table [\_SB_.PCI0._PRT]
ACPI: PCI Interrupt Link [LNKA] (IRQs *11)
ACPI: PCI Interrupt Link [LNKB] (IRQs *9)
ACPI: PCI Interrupt Link [LNKC] (IRQs 5) *0, disabled.
ACPI: PCI Interrupt Link [LNKD] (IRQs *11)
ACPI: PCI Interrupt Link [LNKE] (IRQs *11)
ACPI: PCI Interrupt Link [LNKF] (IRQs *9)
ACPI: PCI Interrupt Link [LNKG] (IRQs *9)
ACPI: PCI Interrupt Link [LNKH] (IRQs 9) *0, disabled.
Linux Plug and Play Support v0.97 (c) Adam Belay
pnp: PnP ACPI init
ACPI: bus type pnp registered
pnp: PnP ACPI: found 12 devices
ACPI: ACPI bus type pnp unregistered
SCSI subsystem initialized
libata version 2.21 loaded.
usbcore: registered new interface driver usbfs
usbcore: registered new interface driver hub
usbcore: registered new device driver usb
PCI: Using ACPI for IRQ routing
PCI: If a device doesn't work, try "pci=routeirq".  If it helps, post a report
pnp: 00:04: ioport range 0x8000-0x808f has been reserved
pnp: 00:04: ioport range 0x8090-0x80ff has been reserved
pnp: 00:04: ioport range 0x8100-0x811f has been reserved
pnp: 00:04: ioport range 0x4d0-0x4d1 has been reserved
pnp: 00:04: ioport range 0xfe00-0xfe00 has been reserved
Time: tsc clocksource has been installed.
pnp: 00:04: iomem range 0xd0000-0xd3fff could not be reserved
pnp: 00:04: iomem range 0xd8000-0xdbfff has been reserved
pnp: 00:04: iomem range 0xfec00000-0xfecfffff could not be reserved
pnp: 00:04: iomem range 0xfee00000-0xfeefffff could not be reserved
PCI: Bridge: 0000:00:01.0
  IO window: 9000-9fff
  MEM window: ec100000-ec1fffff
  PREFETCH window: f0000000-f7ffffff
PCI: Bus 2, cardbus bridge: 0000:00:0c.0
  IO window: 00001c00-00001cff
  IO window: 00002000-000020ff
  PREFETCH window: 30000000-33ffffff
  MEM window: 34000000-37ffffff
ACPI: PCI Interrupt Link [LNKC] enabled at IRQ 5
PCI: setting IRQ 5 as level-triggered
ACPI: PCI Interrupt 0000:00:0c.0[A] -> Link [LNKC] -> GSI 5 (level, low) -> IRQ 5
NET: Registered protocol family 2
IP route cache hash table entries: 4096 (order: 2, 16384 bytes)
TCP established hash table entries: 16384 (order: 5, 131072 bytes)
TCP bind hash table entries: 16384 (order: 4, 65536 bytes)
TCP: Hash tables configured (established 16384 bind 16384)
TCP reno registered
NTFS driver 2.1.28 [Flags: R/O].
io scheduler noop registered
io scheduler cfq registered (default)
Boot video device is 0000:01:00.0
ACPI: AC Adapter [ADP0] (on-line)
ACPI: Battery Slot [BAT0] (battery present)
input: Power Button (FF) as /class/input/input0
ACPI: Power Button (FF) [PWRF]
input: Power Button (CM) as /class/input/input1
ACPI: Power Button (CM) [PWRB]
input: Sleep Button (CM) as /class/input/input2
ACPI: Sleep Button (CM) [SLPB]
input: Lid Switch as /class/input/input3
ACPI: Lid Switch [LID]
ACPI: Processor [CPU0] (supports 8 throttling states)
ACPI: Thermal Zone [THM0] (60 C)
Non-volatile memory driver v1.2
8139too Fast Ethernet driver 0.9.28
PCI: Enabling device 0000:00:0a.0 (0000 -> 0003)
ACPI: PCI Interrupt Link [LNKD] enabled at IRQ 11
PCI: setting IRQ 11 as level-triggered
ACPI: PCI Interrupt 0000:00:0a.0[A] -> Link [LNKD] -> GSI 11 (level, low) -> IRQ 11
eth0: RealTek RTL8139 at 0xe080a000, 00:90:f5:24:ff:0b, IRQ 11
eth0:  Identified 8139 chip type 'RTL-8100B/8139D'
pata_sis 0000:00:02.5: version 0.5.1
ACPI: PCI Interrupt Link [LNKA] enabled at IRQ 11
ACPI: PCI Interrupt 0000:00:02.5[A] -> Link [LNKA] -> GSI 11 (level, low) -> IRQ 11
scsi0 : pata_sis
scsi1 : pata_sis
ata1: PATA max UDMA/133 cmd 0x000101f0 ctl 0x000103f6 bmdma 0x00011000 irq 14
ata2: PATA max UDMA/133 cmd 0x00010170 ctl 0x00010376 bmdma 0x00011008 irq 15
ata1.00: ATA-6: FUJITSU MHT2060AT, 009A, max UDMA/100
ata1.00: 117210240 sectors, multi 16: LBA 
ata1.00: configured for UDMA/100
ata2.00: ATAPI: SONY CD-RW/DVD-ROM CRX830E, JYK1, max UDMA/33
ata2.00: configured for UDMA/33
scsi 0:0:0:0: Direct-Access     ATA      FUJITSU MHT2060A 009A PQ: 0 ANSI: 5
sd 0:0:0:0: [sda] 117210240 512-byte hardware sectors (60012 MB)
sd 0:0:0:0: [sda] Write Protect is off
sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00
sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
sd 0:0:0:0: [sda] 117210240 512-byte hardware sectors (60012 MB)
sd 0:0:0:0: [sda] Write Protect is off
sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00
sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
 sda: sda1 sda2 < sda5 sda6 sda7 sda8 sda9 >
sd 0:0:0:0: [sda] Attached SCSI disk
sd 0:0:0:0: Attached scsi generic sg0 type 0
scsi 1:0:0:0: CD-ROM            SONY     CD-RW  CRX830E   JYK1 PQ: 0 ANSI: 5
scsi 1:0:0:0: Attached scsi generic sg1 type 5
PCI: Enabling device 0000:00:03.3 (0000 -> 0002)
ACPI: PCI Interrupt Link [LNKH] enabled at IRQ 9
PCI: setting IRQ 9 as level-triggered
ACPI: PCI Interrupt 0000:00:03.3[D] -> Link [LNKH] -> GSI 9 (level, low) -> IRQ 9
ehci_hcd 0000:00:03.3: EHCI Host Controller
ehci_hcd 0000:00:03.3: new USB bus registered, assigned bus number 1
PCI: cache line size of 128 is not supported by device 0000:00:03.3
ehci_hcd 0000:00:03.3: irq 9, io mem 0xec004000
ehci_hcd 0000:00:03.3: USB 2.0 started, EHCI 1.00, driver 10 Dec 2004
usb usb1: configuration #1 chosen from 1 choice
hub 1-0:1.0: USB hub found
hub 1-0:1.0: 6 ports detected
ohci_hcd: 2006 August 04 USB 1.1 'Open' Host Controller (OHCI) Driver
ACPI: PCI Interrupt Link [LNKE] enabled at IRQ 11
ACPI: PCI Interrupt 0000:00:03.0[A] -> Link [LNKE] -> GSI 11 (level, low) -> IRQ 11
ohci_hcd 0000:00:03.0: OHCI Host Controller
ohci_hcd 0000:00:03.0: new USB bus registered, assigned bus number 2
ohci_hcd 0000:00:03.0: irq 11, io mem 0xec001000
usb usb2: configuration #1 chosen from 1 choice
hub 2-0:1.0: USB hub found
hub 2-0:1.0: 2 ports detected
ACPI: PCI Interrupt Link [LNKF] enabled at IRQ 9
ACPI: PCI Interrupt 0000:00:03.1[B] -> Link [LNKF] -> GSI 9 (level, low) -> IRQ 9
ohci_hcd 0000:00:03.1: OHCI Host Controller
ohci_hcd 0000:00:03.1: new USB bus registered, assigned bus number 3
ohci_hcd 0000:00:03.1: irq 9, io mem 0xec002000
usb 1-2: new high speed USB device using ehci_hcd and address 2
usb usb3: configuration #1 chosen from 1 choice
hub 3-0:1.0: USB hub found
hub 3-0:1.0: 2 ports detected
ACPI: PCI Interrupt Link [LNKG] enabled at IRQ 9
ACPI: PCI Interrupt 0000:00:03.2[C] -> Link [LNKG] -> GSI 9 (level, low) -> IRQ 9
ohci_hcd 0000:00:03.2: OHCI Host Controller
ohci_hcd 0000:00:03.2: new USB bus registered, assigned bus number 4
ohci_hcd 0000:00:03.2: irq 9, io mem 0xec003000
usb 1-2: configuration #1 chosen from 1 choice
usb usb4: configuration #1 chosen from 1 choice
hub 4-0:1.0: USB hub found
hub 4-0:1.0: 2 ports detected
Initializing USB Mass Storage driver...
usb 2-2: new full speed USB device using ohci_hcd and address 2
usb 2-2: configuration #1 chosen from 1 choice
usbcore: registered new interface driver usb-storage
USB Mass Storage support registered.
PNP: PS/2 Controller [PNP0303:KBC,PNP0f13:PS2M] at 0x60,0x64 irq 1,12
i8042.c: Detected active multiplexing controller, rev 1.1.
serio: i8042 KBD port at 0x60,0x64 irq 1
serio: i8042 AUX0 port at 0x60,0x64 irq 12
serio: i8042 AUX1 port at 0x60,0x64 irq 12
serio: i8042 AUX2 port at 0x60,0x64 irq 12
serio: i8042 AUX3 port at 0x60,0x64 irq 12
mice: PS/2 mouse device common for all mice
input: AT Translated Set 2 keyboard as /class/input/input4
Advanced Linux Sound Architecture Driver Version 1.0.14 (Thu May 31 09:03:25 2007 UTC).
PCI: Enabling device 0000:00:02.7 (0000 -> 0001)
ACPI: PCI Interrupt 0000:00:02.7[C] -> Link [LNKC] -> GSI 5 (level, low) -> IRQ 5
input: PS/2 Mouse as /class/input/input5
input: AlpsPS/2 ALPS GlidePoint as /class/input/input6
intel8x0_measure_ac97_clock: measured 50494 usecs
intel8x0: clocking to 48000
ALSA device list:
  #0: SiS SI7012 with ALC200,200P at irq 5
TCP cubic registered
NET: Registered protocol family 1
NET: Registered protocol family 17
ieee80211: 802.11 data/management/control stack, git-1.1.13
ieee80211: Copyright (C) 2004-2005 Intel Corporation <jketreno@linux.intel.com>
ieee80211_crypt: registered algorithm 'NULL'
ieee80211_crypt: registered algorithm 'WEP'
Using IPI Shortcut mode
VFS: Mounted root (ext2 filesystem) readonly.
Freeing unused kernel memory: 136k freed
usb 1-2: reset high speed USB device using ehci_hcd and address 2
zd1211rw 1-2:1.0: firmware version 4725
zd1211rw 1-2:1.0: zd1211b chip 0586:3410 v4810 high 00-13-49 AL2230_RF pa0 g---S
zd1211rw 1-2:1.0: eth1
usbcore: registered new interface driver zd1211rw
Adding 497972k swap on /dev/sda8.  Priority:1 extents:1 across:497972k
NTFS volume version 3.1.
SoftMAC: Open Authentication completed with 00:13:49:a0:1e:f9

^ permalink raw reply	[flat|nested] 15+ messages in thread

* Re: File corruption when using kernels 2.6.18+
  2007-09-30 15:40 File corruption when using kernels 2.6.18+ Neil Romig
  2007-09-30 16:29 ` Pekka Enberg
@ 2007-10-02 22:30 ` Chuck Ebbert
  1 sibling, 0 replies; 15+ messages in thread
From: Chuck Ebbert @ 2007-10-02 22:30 UTC (permalink / raw)
  To: Neil Romig; +Cc: linux-kernel

On 09/30/2007 11:40 AM, Neil Romig wrote:
> I am using kernel 2.6.17.14, and would like to use newer versions for
> the wireless code but I get file corruption with any kernel more recent
> than this. My system uses a SiS645DX chipset (it is a rebadged CLEVO
> D400E) with 5513 IDE.
> 
> I get this corruption with read/writes, i.e using "cp", "dd", when
> compiling software, writing to CD, etc etc. An example:
> 
> cp ../Changelog-2.6.18 .
> diff Changelog-2.6.18 ../Changelog-2.6.18
> 
> 16377c16377
> <       LD      .top_vmlinux1
> ---
>>       LD      .tmp_vmlinux1
> 23954c23954
> < Date:   Mon Jul 1% 04:45:11 2006 -0700
> ---
>> Date:   Mon Jul 10 04:45:11 2006 -0700

Is there some pattern to the corruption, like maybe it occurs once every
N bytes in the file?


^ permalink raw reply	[flat|nested] 15+ messages in thread

[parent not found: <fa.VCoGTwbB+qeNlkBJ24MiuXcGSRA@ifi.uio.no>]

[parent not found: <fa.R+FhT6IGmV/dDweUt/MdSeA5YbQ@ifi.uio.no>]

[parent not found: <fa.7MxTIt/ik0uRFN/lMWUasYV/JyE@ifi.uio.no>]

[parent not found: <fa.YJ4uCPzXT5TQElSosyz98cpuMSc@ifi.uio.no>]

[parent not found: <fa.Tp9UUX9EYprQyLg0shgH1YG9DDM@ifi.uio.no>]

[parent not found: <fa.PzpJEEoLXfC+eOQZjTWjdf9vdnE@ifi.uio.no>]

* Re: File corruption when using kernels 2.6.18+
       [not found]         ` <fa.PzpJEEoLXfC+eOQZjTWjdf9vdnE@ifi.uio.no>
@ 2007-10-04  2:59           ` Robert Hancock
  2007-10-04  3:39             ` Linus Torvalds
  0 siblings, 1 reply; 15+ messages in thread
From: Robert Hancock @ 2007-10-04  2:59 UTC (permalink / raw)
  To: Linus Torvalds
  Cc: Pekka Enberg, Neil Romig, linux-kernel, hyoshiok, Andrew Morton

Linus Torvalds wrote:
> 
> On Wed, 3 Oct 2007, Pekka Enberg wrote:
>> On 10/3/07, Linus Torvalds <torvalds@linux-foundation.org> wrote:
>>> I would bet that the reason the intel-optimized memcpy triggers this is
>>> that the non-temporal stores just means that you go out directly on the
>>> bus, and it probably just shows a weakness in the chipset or bus that
>>> doesn't show with the normal cacheline accesses.
>> But that should show up with memtest too, no?
> 
> Not unless memtest uses non-temporal stores with the same (or similar) 
> access patterns.
> 
> The thing is, the CPU cache hides a *lot* of activity from the chipset, 
> and changes the access patterns radically. 
> 
> With normal cached accesses, you'd normally see just the "fill cacheline" 
> and "write out cacheline" pattern. With movnt, you'd see non-cacheline 
> accesses to memory. If the chipset was tested under mostly normal loads, 
> the movnt cases have been getting a lot less coverage.
> 
> Now, I do agree that it certainly *can* be a CPU bug too.  I doubt it, 
> though. 
> 
> I'd check the power supply (brownouts cause random corruption, and it 
> might have a "peak power pattern" thing to it), and it's worth re-seating 
> any DIMM's etc. And it's definitely worth going into the BIOS setup screen 
> and making sure that nothing is even close to debatable (ie take RAM 
> timings down to non-aggressive levels, make sure bus frequencies and 
> multipliers are not even close to borderline, etc etc).

I didn't see what CPU this was, but there was this nasty erratum on some 
Athlon 64/Opteron processors. I was trying to debug a problem someone 
else mentioned a while ago (and which I could duplicate on my system) 
where doing huge memsets in userspace (which glibc uses non-temporal 
stores for) repeatedly would cause a system lockup or crash. Amazingly 
enough after I upgraded the CPU from my old Athlon 64 3500+ to a new X2 
4200+ the problem went away..

At the time I looked into whether this workaround could be applied in 
the kernel if the BIOS failed to, but it seemed that accesses to the MSR 
they mentioned failed, so I don't know what the story is..

from 
http://www.amd.com/us-en/assets/content_type/white_papers_and_tech_docs/25759.pdf 

Erratum 97: 128-Bit Streaming Stores May Cause Coherency Failure
Description: Under a specific set of internal pipeline conditions, stale 
data may be left in the L1 cache when a 128-bit streaming store (MOVNT*) 
to a writeback (WB) memory type misses in the L1 data cache and both L1 
and L2 TLBs.
Potential Effect on System
Memory coherence failures leading to unpredictable operation.
Suggested Workaround
BIOS should set DC_CFG.DIS_CNV_WC_SSO (bit 3 of MSR 0xC001_1022). The 
performance effects of setting this bit are limited to streaming stores 
to the write-combining (WC) memory type, a case expected to rarely occur 
in actual usage. No loss of performance occurs in the general case (WB 
memory type).
This workaround must not be applied to processors prior to revision C0.

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

^ permalink raw reply	[flat|nested] 15+ messages in thread

* Re: File corruption when using kernels 2.6.18+
  2007-10-04  2:59           ` Robert Hancock
@ 2007-10-04  3:39             ` Linus Torvalds
  0 siblings, 0 replies; 15+ messages in thread
From: Linus Torvalds @ 2007-10-04  3:39 UTC (permalink / raw)
  To: Robert Hancock
  Cc: Pekka Enberg, Neil Romig, linux-kernel, hyoshiok, Andrew Morton

On Wed, 3 Oct 2007, Robert Hancock wrote:
> 
> Erratum 97: 128-Bit Streaming Stores May Cause Coherency Failure

The Intel-optimized memcpy doesn't use the SSE registers, just regular 
32-bit integer nontemporal stores (movnti). The reason is that the SSE 
state save is too expensive to be worth it.

So it's not that. Also, considering that it was a single-bit error in all 
the cases I saw, I wouldn't expect it to be a cache coherency problem, 
which I'd expect to corrupt a whole cacheline or possibly at least a whole 
access.

That said, bit corruption can be just about anything. It's certainly not 
impossible that it's a CPU bug.

But my first guess would be slightly dodgy motherboard, possibly coupled 
with a chipset that simply isn't very tolerant to any timing errors. If 
the motherboard traces to the DDR aren't impedance-matched, or if the 
traces don't have the same length, or if the capacitors that are supposed 
to handle spikes in burst current aren't up to snuff, you'll just get 
noisy lines.

And at some point, noisy lines means that you go from reliable operation 
to "oh, that bit didn't make it correctly".

Lowering the front-side bus frequency or altering the memory timings can 
help (ie doing things like running DDR-333 at DDR-266). Making sure that 
your power supply isn't even close to its limits is good. And choosing a 
motherboard and chipsets from a reliable manufacturer is more than a good 
idea.

The reason why it's interesting that the errors seemed to happen in the 
same byte-lane is that I think it's common policy to route data lines on 
the same layer, and matching trace length per group is very important, 
because you do signal clocking per-group, afaik. But on the other hand, 
multiple layers on the board are expensive, so people try to minimize 
them, and maybe you end up routing through a via to another layer - which 
then makes timing and capacitance harder.

Or there aren't ground lines close enough, or the data lines are too close 
to other lines and you get cross-talk etc etc.

No, I've not done board design, and I don't know what I'm talking about, 
but look at the interesting zig-zagging the data (and address) lines often 
do on the board. It often looks totally crazy ("why doesn't that line just 
go straight?"), but the thing is that the groups all need to have the same 
length, but the pins are all at different points, so you can't make the 
lines straight, or some of them would be much shorter than others.

And if something is border-line, it may work all of the time - *until* you 
hit specific patterns that cause lots of lines to wiggle around, and then 
a capacitor won't handle the extra current draw from switching, or 
cross-talk between lines hits you, and what used to work doesn't work any 
more.

I wish we all had ECC memory. That gets rid of a lot of worries.

			Linus

^ permalink raw reply	[flat|nested] 15+ messages in thread

end of thread, other threads:[~2007-10-04 18:33 UTC | newest]

Thread overview: 15+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2007-09-30 15:40 File corruption when using kernels 2.6.18+ Neil Romig
2007-09-30 16:29 ` Pekka Enberg
2007-10-02 21:05   ` Neil Romig
2007-10-03  5:18     ` Pekka Enberg
2007-10-03 18:42       ` Neil Romig
2007-10-03 18:48         ` Pekka Enberg
2007-10-03 19:22           ` Linus Torvalds
2007-10-03 19:35             ` Pekka Enberg
2007-10-03 19:54               ` Linus Torvalds
2007-10-04  1:11                 ` Hiro Yoshioka
2007-10-03 20:30               ` Alan Cox
2007-10-04 18:34                 ` Neil Romig
2007-10-02 22:30 ` Chuck Ebbert
     [not found] <fa.VCoGTwbB+qeNlkBJ24MiuXcGSRA@ifi.uio.no>
     [not found] ` <fa.R+FhT6IGmV/dDweUt/MdSeA5YbQ@ifi.uio.no>
     [not found]   ` <fa.7MxTIt/ik0uRFN/lMWUasYV/JyE@ifi.uio.no>
     [not found]     ` <fa.YJ4uCPzXT5TQElSosyz98cpuMSc@ifi.uio.no>
     [not found]       ` <fa.Tp9UUX9EYprQyLg0shgH1YG9DDM@ifi.uio.no>
     [not found]         ` <fa.PzpJEEoLXfC+eOQZjTWjdf9vdnE@ifi.uio.no>
2007-10-04  2:59           ` Robert Hancock
2007-10-04  3:39             ` Linus Torvalds

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