Felipe Tonello wrote: > DSP (read sensors and read/send MIDI) <- UART -> SOC (imx6) <- USB > MIDI GADGET -> HOST > > When the throughput from the DSP is high, thus causing the throughput > on the USB to be high as well, I get a Kernel Panic saying to increase > the coherent_pool. I've used some crazy sizes like 1M, 4M and even 8M. > Obviously when I increase, it takes longer to crash but it still > crashes. This sounds like a memory leak in your USB host controller's driver (whatever it is). The USB MIDI driver uses URB_NO_TRANSFER_DMA_MAP with bulk transfers, and continually resubmits the same URBs. Both might be somewhat unusual. Regards, Clemens -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
