>>>>> "Dallas" == Dallas Clement <dallas.a.clement@xxxxxxxxx> writes: Dallas> Hi Mark. I have three different controllers on this Dallas> motherboard. A Marvell 9485 controls 8 of the disks. And an Dallas> Intel Cougar Point controls the 4 remaining disks. What type of PCIe slots are the controllers in? And how fast are the controllers/drives? Are they SATA1/2/3 drives? >> If you're spinning in IO loops then it could be a driver issue. Dallas> It sure is looking like that. I will try to profile the Dallas> kernel threads today and maybe use blktrace as Phil Dallas> recommended to see what is going on there. what kernel aer you running? Dallas> This is pretty sad that 12 single threaded fio jobs can bring Dallas> this system to its knees. I think it might be better to lower the queue depth, you might be just blowing out the controller caches... hard to know. -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
