Messages in this thread | | | Subject | Re: PATCH: Fix broken PIO with libata | From | Alan Cox <> | Date | Tue, 16 May 2006 16:53:11 +0100 |
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On Maw, 2006-05-16 at 11:33 -0400, Kevin Radloff wrote: > However, I still have a problem with pata_pcmcia (that I actually > experienced also with the ide-cs driver) where sustained reading or > writing to the CF card spikes the CPU with nearly 100% system time.
That is normal. The PCMCIA devices don't support DMA. As a result of this the processor has to fetch each byte itself over the ISA speed PCMCIA bus link.
Alan
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