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    SubjectRe: [PATCH] SCSI midlayer power management
    Hi!

    > > Some hosts will continuously DMA to memory iirc.. I remember having a
    > > problem with 53c8xx on some macs when transitionning from MacOS to Linux
    > > because of that.
    >
    > I think you're thinking of the scripts engine? on pre 53c875 chips,
    > yes, this is true. The on-board processor is executing instructions
    > from host memory. However, this is read only in quiescent (waiting for
    > host connect or target reconnect) mode, so shouldn't be a problem for
    > suspend. On the 875 and later, we host the scripts in on-chip memory so
    > they shouldn't be troubling main memory when idling.

    Even read-only access could hurt.... That DMA engine is going to get
    very unhappy if we change data from under it, right?


    Pavel
    --
    People were complaining that M$ turns users into beta-testers...
    ...jr ghea gurz vagb qrirybcref, naq gurl frrz gb yvxr vg gung jnl!
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