Messages in this thread | | | Date | Thu, 12 Aug 2004 15:14:57 +0200 | From | Pavel Machek <> | Subject | Re: [PATCH] SCSI midlayer power management |
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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! - 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/
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