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    SubjectRe: [2.6.7-mm4] Network regression?
    Pulled from another thread, have you tried this:

    sysctl -w net.ipv4.tcp_default_win_scale=0


    Phy
    --- Stefano Rivoir <s.rivoir@gts.it> wrote:
    >
    > Hi all,
    >
    > as probably discussed in another thread (or maybe
    > related to it?),
    > 2.6.7-mm4 shows here a massive drop in network
    > performances, while
    > vanilla 2.6.7 runs just fine.
    >
    > I'm behind a ~150 KBytes/sec ADSL, and with 2.6.7 I
    > can download at full
    > speed, while with -mm4 I can't go over 18/19 Kb/sec.
    >
    > Note that I'm just apt-getting from
    > http://http.us.debian.org, but even
    > downloading from kernel.org does the same.
    >
    > Am I missing something I should be aware of?
    >
    > Here attached, .config and lspci -v.
    >
    > Bye
    >
    > --
    > Stefano RIVOIR
    >
    > > #
    > # Automatically generated make config: don't edit
    > #
    > CONFIG_X86=y
    > CONFIG_MMU=y
    > CONFIG_UID16=y
    > CONFIG_GENERIC_ISA_DMA=y
    >
    > #
    > # Code maturity level options
    > #
    > CONFIG_EXPERIMENTAL=y
    > # CONFIG_CLEAN_COMPILE is not set
    > # CONFIG_STANDALONE is not set
    > CONFIG_BROKEN=y
    > CONFIG_BROKEN_ON_SMP=y
    >
    > #
    > # General setup
    > #
    > CONFIG_SWAP=y
    > CONFIG_SYSVIPC=y
    > CONFIG_POSIX_MQUEUE=y
    > CONFIG_BSD_PROCESS_ACCT=y
    > CONFIG_SYSCTL=y
    > # CONFIG_AUDIT is not set
    > CONFIG_LOG_BUF_SHIFT=15
    > CONFIG_HOTPLUG=y
    > # CONFIG_IKCONFIG is not set
    > # CONFIG_EMBEDDED is not set
    > CONFIG_KALLSYMS=y
    > # CONFIG_KALLSYMS_ALL is not set
    > CONFIG_FUTEX=y
    > CONFIG_EPOLL=y
    > CONFIG_IOSCHED_NOOP=y
    > CONFIG_IOSCHED_AS=y
    > CONFIG_IOSCHED_DEADLINE=y
    > CONFIG_IOSCHED_CFQ=y
    > # CONFIG_CC_OPTIMIZE_FOR_SIZE is not set
    >
    > #
    > # Loadable module support
    > #
    > CONFIG_MODULES=y
    > CONFIG_MODULE_UNLOAD=y
    > # CONFIG_MODULE_FORCE_UNLOAD is not set
    > CONFIG_OBSOLETE_MODPARM=y
    > # CONFIG_MODVERSIONS is not set
    > CONFIG_KMOD=y
    >
    > #
    > # Processor type and features
    > #
    > 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_MWINCHIPC6 is not set
    > # CONFIG_MWINCHIP2 is not set
    > # CONFIG_MWINCHIP3D 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_X86_WP_WORKS_OK=y
    > CONFIG_X86_INVLPG=y
    > CONFIG_X86_BSWAP=y
    > CONFIG_X86_POPAD_OK=y
    > CONFIG_X86_GOOD_APIC=y
    > CONFIG_X86_INTEL_USERCOPY=y
    > CONFIG_X86_USE_PPRO_CHECKSUM=y
    > # CONFIG_HPET_TIMER is not set
    > # CONFIG_HPET_EMULATE_RTC is not set
    > # CONFIG_SMP is not set
    > CONFIG_PREEMPT=y
    > # CONFIG_X86_UP_APIC is not set
    > CONFIG_X86_TSC=y
    > # CONFIG_X86_MCE is not set
    > # CONFIG_TOSHIBA is not set
    > # CONFIG_I8K 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_NOHIGHMEM=y
    > # CONFIG_HIGHMEM4G is not set
    > # CONFIG_HIGHMEM64G is not set
    > # CONFIG_MATH_EMULATION is not set
    > CONFIG_MTRR=y
    > # CONFIG_EFI is not set
    > CONFIG_HAVE_DEC_LOCK=y
    > CONFIG_REGPARM=y
    >
    > #
    > # Power management options (ACPI, APM)
    > #
    > # CONFIG_PM is not set
    >
    > #
    > # ACPI (Advanced Configuration and Power Interface)
    > Support
    > #
    > CONFIG_ACPI=y
    > CONFIG_ACPI_BOOT=y
    > CONFIG_ACPI_INTERPRETER=y
    > CONFIG_ACPI_AC=m
    > CONFIG_ACPI_BATTERY=m
    > CONFIG_ACPI_BUTTON=m
    > CONFIG_ACPI_FAN=m
    > CONFIG_ACPI_PROCESSOR=m
    > CONFIG_ACPI_THERMAL=m
    > CONFIG_ACPI_ASUS=m
    > CONFIG_ACPI_TOSHIBA=m
    > # CONFIG_ACPI_DEBUG is not set
    > CONFIG_ACPI_BUS=y
    > CONFIG_ACPI_EC=y
    > CONFIG_ACPI_POWER=y
    > CONFIG_ACPI_PCI=y
    > CONFIG_ACPI_SYSTEM=y
    > # CONFIG_X86_PM_TIMER 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_PCI_MMCONFIG=y
    > # CONFIG_PCI_LEGACY_PROC is not set
    > CONFIG_PCI_NAMES=y
    > # CONFIG_ISA is not set
    > # CONFIG_MCA is not set
    > # CONFIG_SCx200 is not set
    >
    > #
    > # PCMCIA/CardBus support
    > #
    > CONFIG_PCMCIA=m
    > # CONFIG_PCMCIA_DEBUG is not set
    > CONFIG_YENTA=m
    > CONFIG_CARDBUS=y
    > CONFIG_I82092=m
    > CONFIG_TCIC=m
    >
    > #
    > # PCI Hotplug Support
    > #
    > # CONFIG_HOTPLUG_PCI is not set
    >
    > #
    > # Executable file formats
    > #
    > CONFIG_BINFMT_ELF=y
    > CONFIG_BINFMT_AOUT=m
    > CONFIG_BINFMT_MISC=m
    >
    > #
    > # Device Drivers
    > #
    >
    > #
    > # Generic Driver Options
    > #
    > # CONFIG_FW_LOADER is not set
    > # CONFIG_DEBUG_DRIVER is not set
    >
    >
    === message truncated ===> 0000:00:00.0 Host bridge:
    Silicon Integrated Systems
    > [SiS] SiS 645xx (rev 03)
    > Subsystem: Asustek Computer, Inc.: Unknown device
    > 1738
    > Flags: bus master, medium devsel, latency 32
    > Memory at e8000000 (32-bit, non-prefetchable)
    > Capabilities: [c0] AGP version 2.0
    >
    > 0000:00:01.0 PCI bridge: Silicon Integrated Systems
    > [SiS] Virtual PCI-to-PCI bridge (AGP) (prog-if 00
    > [Normal decode])
    > Flags: bus master, fast devsel, latency 0
    > Bus: primary=00, secondary=01, subordinate=01,
    > sec-latency=0
    > I/O behind bridge: 0000d000-0000dfff
    > Memory behind bridge: e7800000-e7ffffff
    > Prefetchable memory behind bridge:
    > eff00000-febfffff
    > Expansion ROM at 0000d000 [disabled] [size=4K]
    >
    > 0000:00:02.0 ISA bridge: Silicon Integrated Systems
    > [SiS] SiS963 [MuTIOL Media IO] (rev 14)
    > Flags: bus master, medium devsel, latency 0
    >
    > 0000:00:02.1 SMBus: Silicon Integrated Systems
    > [SiS]: Unknown device 0016
    > Flags: medium devsel, IRQ 11
    > I/O ports at e800 [size=32]
    >
    > 0000:00:02.3 FireWire (IEEE 1394): Silicon
    > Integrated Systems [SiS] FireWire Controller
    > (prog-if 10 [OHCI])
    > Subsystem: Asustek Computer, Inc.: Unknown device
    > 1737
    > Flags: bus master, medium devsel, latency 32, IRQ
    > 11
    > Memory at e7000000 (32-bit, non-prefetchable)
    > Capabilities: [64] Power Management version 2
    >
    > 0000:00:02.5 IDE interface: Silicon Integrated
    > Systems [SiS] 5513 [IDE] (prog-if 80 [Master])
    > Subsystem: Asustek Computer, Inc.: Unknown device
    > 1738
    > Flags: bus master, medium devsel, latency 32
    > I/O ports at b800 [size=16]
    > Capabilities: [58] Power Management version 2
    >
    > 0000:00:02.6 Modem: Silicon Integrated Systems [SiS]
    > AC'97 Modem Controller (rev a0) (prog-if 00
    > [Generic])
    > Subsystem: Asustek Computer, Inc.: Unknown device
    > 1736
    > Flags: medium devsel, IRQ 11
    > I/O ports at b400
    > I/O ports at b000 [size=128]
    > Capabilities: [48] Power Management version 2
    >
    > 0000:00:02.7 Multimedia audio controller: Silicon
    > Integrated Systems [SiS] Sound Controller (rev a0)
    > Subsystem: Asustek Computer, Inc.: Unknown device
    > 1733
    > Flags: bus master, medium devsel, latency 32, IRQ
    > 11
    > I/O ports at a800
    > I/O ports at a400 [size=128]
    > Capabilities: [48] Power Management version 2
    >
    > 0000:00:03.0 USB Controller: Silicon Integrated
    > Systems [SiS] USB 1.0 Controller (rev 0f) (prog-if
    > 10 [OHCI])
    > Subsystem: Asustek Computer, Inc.: Unknown device
    > 1739
    > Flags: bus master, medium devsel, latency 32, IRQ 5
    > Memory at e6800000 (32-bit, non-prefetchable)
    > Capabilities: [dc] Power Management version 2
    >
    > 0000:00:03.1 USB Controller: Silicon Integrated
    > Systems [SiS] USB 1.0 Controller (rev 0f) (prog-if
    > 10 [OHCI])
    > Subsystem: Asustek Computer, Inc.: Unknown device
    > 1739
    > Flags: bus master, medium devsel, latency 32, IRQ 5
    > Memory at e6000000 (32-bit, non-prefetchable)
    > Capabilities: [dc] Power Management version 2
    >
    > 0000:00:03.2 USB Controller: Silicon Integrated
    > Systems [SiS] USB 1.0 Controller (rev 0f) (prog-if
    > 10 [OHCI])
    > Subsystem: Asustek Computer, Inc.: Unknown device
    > 1739
    > Flags: bus master, medium devsel, latency 32, IRQ 5
    > Memory at e5800000 (32-bit, non-prefetchable)
    > Capabilities: [dc] Power Management version 2
    >
    > 0000:00:03.3 USB Controller: Silicon Integrated
    > Systems [SiS] USB 2.0 Controller (prog-if 20 [EHCI])
    > Subsystem: Asustek Computer, Inc.: Unknown device
    > 173a
    > Flags: bus master, medium devsel, latency 32, IRQ 5
    > Memory at e5000000 (32-bit, non-prefetchable)
    > Capabilities: [50] Power Management version 2
    >
    > 0000:00:0a.0 CardBus bridge: ENE Technology Inc
    > CB720 Cardbus Controller (rev 01)
    > Subsystem: Asustek Computer, Inc.: Unknown device
    > 1734
    > Flags: bus master, medium devsel, latency 168, IRQ
    > 11
    > Memory at 20000000 (32-bit, non-prefetchable)
    > Bus: primary=00, secondary=02, subordinate=05,
    > sec-latency=176
    > Memory window 0: 20400000-207ff000 (prefetchable)
    > Memory window 1: 20800000-20bff000
    > I/O window 0: 00004000-000040ff
    > I/O window 1: 00004400-000044ff
    > 16-bit legacy interface ports at 0001
    >
    > 0000:00:0a.1 CardBus bridge: ENE Technology Inc
    > CB720 Cardbus Controller (rev 01)
    > Subsystem: Asustek Computer, Inc.: Unknown device
    > 1734
    > Flags: bus master, medium devsel, latency 168, IRQ
    > 11
    > Memory at 20001000 (32-bit, non-prefetchable)
    > Bus: primary=00, secondary=06, subordinate=09,
    > sec-latency=176
    > Memory window 0: 20c00000-20fff000 (prefetchable)
    > Memory window 1: 21000000-213ff000
    > I/O window 0: 00004800-000048ff
    > I/O window 1: 00004c00-00004cff
    > 16-bit legacy interface ports at 0001
    >
    > 0000:00:0a.2 FLASH memory: ENE Technology Inc CB710
    > Memory Card Reader Controller
    > Subsystem: Asustek Computer, Inc.: Unknown device
    > 173b
    > Flags: medium devsel, IRQ 11
    > I/O ports at 9800
    > Capabilities: [a0] Power Management version 2
    >
    > 0000:00:0d.0 Ethernet controller: 3Com Corporation
    > 3c940 10/100/1000Base-T [Marvell] (rev 12)
    > Subsystem: Asustek Computer, Inc.: Unknown device
    > 173c
    > Flags: bus master, 66MHz, medium devsel, latency
    > 32, IRQ 11
    > Memory at e4000000 (32-bit, non-prefetchable)
    > I/O ports at 9400 [size=256]
    > Capabilities: [48] Power Management version 2
    > Capabilities: [50] Vital Product Data
    >
    > 0000:01:00.0 VGA compatible controller: ATI
    > Technologies Inc Radeon R250 Lf [Radeon Mobility
    > 9000 M9] (rev 01) (prog-if 00 [VGA])
    > Subsystem: Asustek Computer, Inc.: Unknown device
    > 1732
    > Flags: bus master, stepping, 66MHz, medium devsel,
    > latency 64, IRQ 11
    > Memory at f0000000 (32-bit, prefetchable)
    > [size=effe0000]
    > I/O ports at d800 [size=256]
    > Memory at e7800000 (32-bit, non-prefetchable)
    > [size=64K]
    > Expansion ROM at 00020000 [disabled]
    > Capabilities: [58] AGP version 2.0
    > Capabilities: [50] Power Management version 2
    >
    >


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