> When you say "old IDE", can you expand on this one for me. I'm trying to > learn as I go along. This is the old Linux IDE driver with support of an > Intel PIIX module? If I understand it correctly, why would RedHat then drivers/ide is the old IDE driver which is pretty much for parallel ATA (big cables) not serial ATA. > update the PIIX module to support later versions of the Intel chipsets, if > this can't work properly with the older version of the kernel? The bug only shows up on the Mac in specific cases so nobody discovered it before then. > Yes, as far as I can tell 5.x doesn't do it either. I guess I have to > wait for CentOS 6, or go with a distribution like Ubuntu that uses a more > up to date kernel as a start. Any distro which tracks recent kernels should work fine so Ubuntu, Fedora etc. Centos/RHEL/etc backport minimal fixes to old kernels to keep maximum stability. The Intel chipset bug might get fixed in an update in future. but I couldn't say. > > You need to use the current IRQ clearing logic for both drivers - the old > > logic only clears the ata status register on PIO events, the newer one > > clears both the ata and DMA status to work around the Intel funny. > > And I guess it wouldn't be easy for me to make these changes, especially > without much kernel hacking knowledge? It's not that big from what I remember, I don't know if Jeff has the relevant patch to hand ? > > [By a strict reading of the spec the Intel behaviour does appear allowed, > > although I hope Intel didn't intend it ...] > > Has anyone tried to contact Intel to see their response? I've not pursued it - even if it wasn't intentional it won't get fixed so we need to support it and now do. Alan -- 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
