> Function reset_buffer_flags() also invoked during the > ioctl(...,TCFLSH,..). At the time of request we can have full buffers > and throttled driver too. If we don't unthrottle driver, we can get > forever throttled driver, because after request, we will have > empty buffers and throttled driver and there is no place to unthrottle driver. > It simple reproduce with "pty" pair then one side sleep on tty->write_wait, > and other side do ioctl(...,TCFLSH,..). Then there is no place to do writers > wake up.
So instead of revertng it why not just fix it ? Just add an argument to the reset_buffer_flags function to indicate if unthrottling is permitted. Alan -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
