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    SubjectRe: Hard locks under high interrupt load?
    This box is running Fedora Core 1 and so, yes, it's running a userspace 
    balance daemon (Redhat's).

    I'll try out the noirqbalance option and get back to the list on that one.

    Zwane Mwaikambo wrote:

    >On Fri, 27 Feb 2004, Dan Creswell wrote:
    >
    >
    >
    >>I'm having zero success in getting 2.6.3 stable under interrupt load. I
    >>can kill my machine in a variety of fashions all of which appear, to my
    >>naive eye, related to interrupt load:
    >>
    >>(1) LAN traffic via E1000 card (X is not running)
    >>(2) Running X for more than a few minutes - starting up a couple of
    >>applications whilst performing some disk-based activity (such as a
    >>compile) usually seems to do the trick.
    >>
    >>(2) is worth a little more examination. I have an NVIDIA card (I can
    >>hear you all groan) *but* I get the same results with the XFree driver
    >>*or* the proprietary NVIDIA driver.
    >>
    >>Disabling IO-APIC usage seems to resolve the problem.
    >>
    >>
    >
    >Does the 'noirqbalance' kernel parameter also serve as a workaround? Are
    >you using any userspace irq balancers?
    >
    >
    >
    >>Machine is a dual Xeon, Tyan S2665 (E7505 chipset) with an MPT-Fusion
    >>SCSI controller.
    >>
    >>2.4.26-pre1 and various other 2.4 kernels give me no problems at all. I
    >>really want to switch my machines over to 2.6 but I can't whilst this
    >>problem persists.
    >>
    >>
    >
    >
    >

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