lkml.org 
[lkml]   [2003]   [Nov]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: 2.9test9-mm1 and DAO ATAPI cd-burning corrupt
    Jens Axboe wrote:
    > On Fri, Nov 07 2003, Nick Piggin wrote:
    >
    >>
    >>Jens Axboe wrote:
    >>
    >>
    >>>On Fri, Nov 07 2003, Nick Piggin wrote:
    >>>
    >>>
    >>>>Jens Axboe wrote:
    >>>>
    >>>>
    >>>>
    >>>>>sys time is usually pretty high if that is the case, and it's hovering
    >>>>>around 5% here... Prakash, are you sure that dma is enabled on the
    >>>>>drive? When you see the problem, do a vmstat 1 for 10 seconds so you are
    >>>>>absolutely sure you are sending the info from when the problem occurs.
    >>>>>
    >>>>>
    >>>>
    >>>>Although have a look at the interrupts field in vmstat 1255, 725, 736 ...
    >>>>
    >>>
    >>>Yeah that is pretty high for just doing a burn, maybe something else is
    >>>
    >>
    >>;) you are forgetting 2.6 should give 1000 timer interrupts per second!
    >
    >
    > Heh indeed, maybe because the archs I use are still at 100. Looks
    > suspiciously like it's loosing timer interrupts, which would indeed
    > point to PIO.
    >
    bash-2.05b# hdparm -I /dev/hdc

    /dev/hdc:

    ATAPI CD-ROM, with removable media
    Model Number: LITE-ON LTR-16102B
    Serial Number:
    Firmware Revision: OS0K
    Standards:
    Used: ATAPI for CD-ROMs, SFF-8020i, r2.5
    Supported: CD-ROM ATAPI-2
    Configuration:
    DRQ response: 50us.
    Packet size: 12 bytes
    Capabilities:
    LBA, IORDY(cannot be disabled)
    DMA: mdma0 mdma1 *mdma2
    Cycle time: min=120ns recommended=120ns
    PIO: pio0 pio1 pio2 pio3 pio4
    Cycle time: no flow control=227ns IORDY flow control=120ns

    For me it looks as though multiword dma 2 is being used, isnt it?

    Another question: When doing dmesg, I see this:

    ...
    ACPI: PCI Interrupt Link [APCK] (IRQs 20 21 22)
    ACPI: PCI Interrupt Link [APCS] (IRQs *23)
    ACPI: PCI Interrupt Link [APCL] (IRQs 20 21 22)
    ACPI: PCI Interrupt Link [APCM] (IRQs 20 21 22)
    ACPI: PCI Interrupt Link [AP3C] (IRQs 20 21 22)
    ACPI: PCI Interrupt Link [APCZ] (IRQs 20 21 22)
    Linux Plug and Play Support v0.97 (c) Adam Belay
    SCSI subsystem initialized
    drivers/usb/core/usb.c: registered new driver usbfs
    drivers/usb/core/usb.c: registered new driver hub
    ACPI: PCI Interrupt Link [LSMB] enabled at IRQ 10
    ACPI: PCI Interrupt Link [LUBA] enabled at IRQ 11
    ACPI: PCI Interrupt Link [LUBB] enabled at IRQ 5
    ACPI: PCI Interrupt Link [LUB2] enabled at IRQ 10
    ACPI: PCI Interrupt Link [LMAC] enabled at IRQ 10
    ACPI: PCI Interrupt Link [LAPU] enabled at IRQ 10
    ...

    Is it normal that SCSI subsystem gets init'ed, even though nothing of it
    is activated in the kernel?

    Prakash

    -
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.kernel.org
    More majordomo info at http://vger.kernel.org/majordomo-info.html
    Please read the FAQ at http://www.tux.org/lkml/

    \
     
     \ /
      Last update: 2005-03-22 13:58    [W:0.023 / U:10.352 seconds]
    ©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site