On Fri, 22 Jun 2007 11:01:09 -0400 Mark Lord <liml@xxxxxx> wrote: > Alan Cox wrote: > > Allow > > > > libata.pata_dma=0 > > > > to disable DMA (default is 1) > > > > SATA is unaffected as disabling DMA for SATA makes no sense at all. > > > > Signed-off-by: Alan Cox <alan@xxxxxxxxxx> > > Alan, > > Should we really be piling up like this on global boot/module options > rather than run-time flags on individual channels/devices ? > > I can imagine systems with internal notebook drives that want dma=1, > plus Cardbus CF devices that require dma=0. > > With a single global flag, how does one do that? We need proper tuning as well but there is huge value (with distro hat on especially) in a single "try this to get it installed and then we can debug it" button. Same with the old IDE. Trying to guide users through selecting specific channels/devices is going to be painful. I want something that I can tell people to get them 'off the ground' and work with them to sort the rest. One possibility I did consider was it being a set of bit flags Default 0x7 0x01 - Disk DMA 0x02 - CF DMA 0x04 - ATAPI DMA then you'd tell folks "try 0" and "try 1" to get them up and going and most would be blissfully unaware of the details of bitflags but still happy Jeff - any preference. - 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
