On Wed, 17 Jan 2018 09:24:32 -0800 Shankara Pailoor <sp3485@xxxxxxxxxxxx> wrote: > Hi Greg, > > Sorry for that. Here is the stack trace. C Program below > serial_in drivers/tty/serial/8250/8250.h:111 [inline] > wait_for_xmitr+0x8a/0x1d0 drivers/tty/serial/8250/8250_port.c:2033 > serial8250_console_putchar+0x19/0x50 drivers/tty/serial/8250/8250_port.c:3170 > uart_console_write+0x98/0xc0 drivers/tty/serial/serial_core.c:1858 The console is spinning in polled mode trying to write data to the console port, which it seems has gotten a bit stuck. Could be the hypervisor hits some kind of buffering limit, could be hypervisor interface broke. Either way the console interface is supposed to stall the machine to ensure the bytes always get out and if your serial port jams or gets massively behind then this will happen. Alan -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
