> polling for media change which involves reading maybe a few tens of > bytes. The overhead of doing those using PIO wouldn't be too much more > than the cost of writing CDBs out. It would help more if we can cut > down the number of commands used for testing media changed event (on my > to do list). Actually the overhead is foul on some laptops as the command byte write wakes up the controller, which then whirrs away for a bit recovering its status before deciding to give us an answer. > Does module parameter / sysfs node sound good enough to you? You mean like the existing "dma" one we already have which lets you turn on/off atapi DMA and could be extended with another bit so we went from 1 - disk 2 - cd 4 - cf to 1 - disk 2 - cd (basic commands) 4 - cf 8 - cd (all) (The idea being that its ordered so troubleshooting almost always comes down to 1,3 - or 1,3,7 with this). So we have 99.9% of this As to the sysfs node for per device setup that makes sense as does fixing the support to allow users to force a mode of their choice, and putting in the geometry fields. 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
