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The limited Ram and processing power and not too fast ATA-controller (slow virtual ram) will destroy those joys. But the board was never intended for that kind of useage.
We are still looking for developers to work on DMA support for the libata driver and to fix up the BestComm support (with Grant and Sylvain).
I have done some research on how best to implement the DMA driver, and it relies on some fairly simple functionality in libata (overriding the qc_issue/qc_defer etc. functions) but unfortunately we cannot access the BestComm tasks loaded by firmware as the current Linux support trashes them.
The same goes for Efika audio which would perform much better if it used the built-in firmware task.
If anyone's up for having a go at this, I'm here to help, unfortunately I just do not have the time (or resources) to really sit and compile for 10 hours to get a kernel then reboot and reboot with new versions of the code from a USB stick and run filesystem tesst to see if it really works :(