Mark Lord wrote: ..
For the first time ever, I can now *heavily* mix PIO commands with NCQ/non-NCQ DMA commands, to drives on an attached PM (well, two attached PMs even), and the thing doesn't croak. Woo-hoo!
.. Here is the simple torture test I'm using for this. It might be fun for others to try something similar on the other LLDs which have PMP support: 1. QuadCore CPU, with 4GB of RAM (lots of simultaneous threads). 2. In one window, do this (lots of overlapping PIO commands): while ( true ) ; do for d in /dev/sd? ; do bash -c "hdparm -C $d &" ; done ; sleep 0.1 ; done 3. In a second window, do this (lots of overlapping DMA/NCQ reads): while (true) ; do for d in /dev/sd? ; do bash -c "hdparm -t $d &" ; done ; sleep 6 ; done Or something like that. Cheers -- 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
