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    SubjectRe: Serial ATA (SATA) for Linux status report
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    Date
    On Thu, 2004-01-15 at 02:41, Jeff Garzik wrote:
    > I'm pretty sure the "excessive interrupts" issue was successfully
    > tracked down by Jon Burgess (thanks!). He found this post describing an
    > ICH5 hardware issue,
    > http://www.mail-archive.com/freebsd-stable@freebsd.org/msg58421.html
    >
    > and he also submitted the attached patch.
    >
    > I've been meaning to rewrite his patch to isolate it more to ata_piix,
    > but in the meantime maybe folks could test this?
    >

    I have an Asus P4C800-E Deluxe, with two drivers on the ICH5 sata
    controllers. It is a 3Ghz cpu using HT.

    I use the normal PIIX ide drivers for the pata channels, and libata for
    the sata ones. I also use the vector based interrupts. Kernel is
    2.6.1-bk4.

    Anyhow, I do not think the interrupt count is _that_ high, as it shares
    with usb and network and I cannot complain of problems with cdrom, etc,
    but I decided to try the patch anyhow. It have some interesting results
    though. First, network stops responding after a few minutes of uptime
    (especially easy to reproduce if you have heavy network traffic), then
    for some reason you cannot start a new program/login/etc, but those
    running seems Ok, and lastly X becomes totally unresponsive (although
    alt-sysrq-b still do work).

    --
    # cat /proc/interrupts
    CPU0 CPU1
    0: 29703539 29690292 IO-APIC-edge timer
    2: 0 0 XT-PIC cascade
    8: 2 0 IO-APIC-edge rtc
    9: 0 0 IO-APIC-level acpi
    14: 564 210 IO-APIC-edge ide0
    15: 1 0 IO-APIC-edge ide1
    169: 1049180 1055746 IO-APIC-level libata, uhci_hcd, eth0
    177: 39519 37904 IO-APIC-level Intel ICH5
    185: 2521873 2494269 IO-APIC-level uhci_hcd, uhci_hcd, nvidia
    193: 0 0 IO-APIC-level uhci_hcd
    201: 0 0 IO-APIC-level ehci_hcd
    NMI: 0 0
    LOC: 59387583 59387287
    ERR: 0
    MIS: 0
    --

    --
    Martin Schlemmer
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