>I've also been running my iBook with interrupts unmasked for many months >without problems. > >Is it possible to get UDMA66 working on the iBook? My version of the kernel >configures the drive for UDMA33. I did try forcing it to UDMA66 using hdparm, >and it utterly toasted the filesystem ;( I doubt it makes a major difference >to the performance, but it'd be nice to get it working. > >Ben -- is it just accurate timings for the chipset that are required to get >UDMA66 working? Do you need access to the iBook hardware or would it be >possible to gather them with the assistance of an iBook owner?
Don't touch the timings. ide-pmac will setup proper timings depending on the drive and the controller revision. If you think someting is wrong, then send me what dmesg says along with a tarball of your /proc/device-tree On the other hand, it's perfectly safe (and recommended) to enable unmasking of irqs. I doubt 32 bits IOs will have any effect (I'm not sure it's properly supported by the HW; but you shouldn't care with DMA anyway). Ben. -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
