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    SubjectRe: High CPU usage (up to server hang) under heavy I/O load
    Tom Sightler wrote:

    >On Fri, 2004-08-13 at 11:46, Sylvain COUTANT wrote:
    >During heavy writes to the drives attached to the PERC4/Di the system
    >becomes practically unusable. I've been wanting to try the 'megaraid2'
    >driver to see if this gets rid of the issue but I haven't been able to
    >try that yet.
    Can confirm same symptoms. But I can say that megaraid2 driver gets rid
    of this slowdown
    (during heavy writing). Only problem you can't use dellmgr or megamon
    with this driver it seems.

    >We have some older systems with PERC2/DC cards which also use the
    >'megaraid' driver but they don't seem to experience this issue so I'm a
    >little suspicious that perhaps this driver simply doesn't work that well
    >with the newer megaraid-like controllers.
    It's PERC3/QC here.


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