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Can anyone tell me what the following kernel parameter does, or let me know where I can find out? Code: pci=nomsi Thanks....
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  1. #1
    Linux Guru smolloy's Avatar
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    Explanation of kernel parameter


    Can anyone tell me what the following kernel parameter does, or let me know where I can find out?
    Code:
    pci=nomsi
    Thanks.
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  2. #2
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    Hi smolloy,

    I found these:

    Code:
    +               msi             [MSI] If the PCI_MSI kernel config parameter is
    +                               enabled, this kernel boot option can be used to
    +                               enable the use of MSI interrupts system-wide.
                    nomsi           [MSI] If the PCI_MSI kernel config parameter is
                                    enabled, this kernel boot option can be used to
                                    disable the use of MSI interrupts system-wide.
    at Re: Make "pci=nomsi" the default on 2.6.20 kernels?

    and

    ¨MSI, Message Signaled Interrupts, uses in-band pci memory space message to raise interrupt, instead of conventional out-band pci INTx pin.¨
    at
    How does MSI/MSI-X work - MSI part? : Charlie Chen's Weblog

    Hope this helps.

  3. #3
    Linux Guru smolloy's Avatar
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    Thanks pavlo_7

    I came across it while trying to fix a big in alsa, but I'm not sure if it works yet.
    Registered Linux user #388328 || Registered LFS user #15880
    AMD 64 X2 4600+ :: 2X1GB DDR2 800 :: GeForce 9400 GT 512MB :: ASUS M2N32 Deluxe :: 4X250GB SATAII
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