Alan Cox wrote: > This is useful when debugging, handling problem systems, or for > distributions just to get the system installed so it can be sorted > out later. > > This is a bit smarter than the old IDE one and lets you do > > libata.pata_dma=0 Disable all PATA DMA like old IDE > libata.pata_dma=1 Disk DMA only > libata.pata_dma=2 ATAPI DMA only > libata.pata_dma=4 CF DMA only > > (or combinations thereof - 0,1,3 being the useful ones I suspect) > > (I've split CF as it seems to be a seperate case of pain and suffering > different to the others and caused by assorted PIO wired adapters etc) > > SATA is not affected - for one its not clear it makes sense to disable > DMA for SATA if even always possible, for two we've seen no failure > evidence to justify needing to support this kind of hammer on SATA. > > Signed-off-by: Alan Cox <alan@xxxxxxxxxx> Acked-by: Tejun Heo <htejun@xxxxxxxxx> -- tejun - To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
