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    SubjectRe: [PATCH 1/8] Restructuring hpet timer generic clock interfaces
    Date
    Hi;

    07 May 2007 Pts tarihinde, Venki Pallipadi şunları yazmıştı:
    > i386 HPET changes.
    >
    > Patchset does the following changes to HPET support:
    > * Add HPET force detect to ICH chipsets, and detect the
    > presence of HPET through PCI quirk.
    > * Enable HPET timer to function in standard interrupt delivery mode,
    > against the current legacy replacement mode
    > * Enable HPET as a PER CPU time event, which will help in laptops that
    > supports C3 and hence has unreliable LAPIC timer.
    >
    > The changes enable processors to stay in idle longer, by increasing the
    > average time spend in an idle state per call, by more than twice, on
    > my dual core laptop. It reduces the number of interrupts on a totally
    > idle system, compared to when I use PIT.

    My machine (SONY VAIO FS-215B) just hangs/freezes (no oops, no MAGIC_SYSRQ)
    after writing "ACPI: Power Button (CM) [PWRB]" on screen

    ...
    Machine check exception polling timer started.
    apm: BIOS version 1.2 Flags 0x03 (Driver version 1.16ac)
    audit: initializing netlink socket (disabled)
    audit(1178591695.734:1): initialized
    highmem bounce pool size: 64 pages
    VFS: Disk quotas dquot_6.5.1
    Dquot-cache hash table entries: 1024 (order 0, 4096 bytes)
    io scheduler noop registered
    io scheduler anticipatory registered
    io scheduler deadline registered
    io scheduler cfq registered (default)
    ACPI: AC Adapter [ADP1] (on-line)
    ACPI: Battery Slot [BAT0] (battery present)
    input: Power Button (FF) as /class/input/input0
    ACPI: Power Button (FF) [PWRF]
    input: Lid Switch as /class/input/input1
    ACPI: Lid Switch [LID0]
    input: Power Button (CM) as /class/input/input2
    ACPI: Power Button (CM) [PWRB]

    Normal boot sequence continues with following;

    ACPI: CPU0 (power states: C1[C1] C2[C2])
    ACPI: Processor [CPU0] (supports 8 throttling states)
    ACPI Exception (processor_core-0783): AE_NOT_FOUND, Processor Device is not
    present [20070126]
    ACPI: Thermal Zone [THRM] (98 C)
    isapnp: Scanning for PnP cards...
    Time: acpi_pm clocksource has been installed.
    isapnp: No Plug & Play device found
    Real Time Clock Driver v1.12ac
    Serial: 8250/16550 driver $Revision: 1.90 $ 4 ports, IRQ sharing enabled
    Clocksource tsc unstable (delta = -490158796 ns)
    floppy0: no floppy controllers found
    RAMDISK driver initialized: 16 RAM disks of 16384K size 1024 blocksize
    loop: loaded (max 8 devices)
    ...

    System boots fine with hpet=disable and by the way, i tried the first version
    of this patchset without a problem (if i remembered correctly, it was just
    force detects the hpet but only enables for x86_64)

    zangetsu ~ # lspci
    00:00.0 Host bridge: Intel Corporation Mobile 915GM/PM/GMS/910GML Express
    Processor to DRAM Controller (rev 03)
    00:02.0 VGA compatible controller: Intel Corporation Mobile 915GM/GMS/910GML
    Express Graphics Controller (rev 03)
    00:02.1 Display controller: Intel Corporation Mobile 915GM/GMS/910GML Express
    Graphics Controller (rev 03)
    00:1b.0 Audio device: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family)
    High Definition Audio Controller (rev 03)
    00:1d.0 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family)
    USB UHCI #1 (rev 03)
    00:1d.1 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family)
    USB UHCI #2 (rev 03)
    00:1d.2 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family)
    USB UHCI #3 (rev 03)
    00:1d.3 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family)
    USB UHCI #4 (rev 03)
    00:1d.7 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family)
    USB2 EHCI Controller (rev 03)
    00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev d3)
    00:1f.0 ISA bridge: Intel Corporation 82801FBM (ICH6M) LPC Interface Bridge
    (rev 03)
    00:1f.1 IDE interface: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family)
    IDE Controller (rev 03)
    00:1f.3 SMBus: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) SMBus
    Controller (rev 03)
    06:03.0 CardBus bridge: Texas Instruments PCI7420 CardBus Controller
    06:03.2 FireWire (IEEE 1394): Texas Instruments PCI7x20 1394a-2000 OHCI
    Two-Port PHY/Link-Layer Controller
    06:03.3 Mass storage controller: Texas Instruments PCI7420/7620 Combo CardBus,
    1394a-2000 OHCI and SD/MS-Pro Controller
    06:04.0 Network controller: Intel Corporation PRO/Wireless 2200BG Network
    Connection (rev 05)
    06:08.0 Ethernet controller: Intel Corporation 82562ET/EZ/GT/GZ - PRO/100 VE
    (LOM) Ethernet Controller Mobile (rev 03)

    Cheers
    --
    S.Çağlar Onur <caglar@pardus.org.tr>
    http://cekirdek.pardus.org.tr/~caglar/

    Linux is like living in a teepee. No Windows, no Gates and an Apache in house!
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