Emeric, >From your usbmon trace, I can find that your TX is extremely slow:
It may take several seconds to complete one packet with 1514bytes. Could you run upstream kernel(3.4 or 3.5-rcX) first to see if the hardware of your smsc95xx NIC is OK? And you'd better to test a usb storage transfer on the omap4 ehci host. I guess the hardware of smsc95xx may be bad. Thanks, -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/709245 Title: ARM SMP scheduler performance bug To manage notifications about this bug go to: https://bugs.launchpad.net/linaro-ubuntu/+bug/709245/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs