On Tue, 2018-05-15 at 21:34 +0300, Andy Shevchenko wrote: > Kernel console is sensitive to any kind of complex work needed to > print > out anything on it. One such case is emergency print during Oops. > > This series proposes to disable runtime PM and DMA operations on 8250 > serial console. > > More detailed explanation why is provided in patch 2. > > The series has been in our internal trees for years already with no > problems observed.
+Cc: Tony. You might have some thoughts / test means for this. > > Andy Shevchenko (3): > console: introduce ->exit() callback > serial: 8250_port: Don't use power management for kernel console > serial: 8250_port: Disable DMA operations for kernel console > > drivers/tty/serial/8250/8250_core.c | 9 +++++++++ > drivers/tty/serial/8250/8250_port.c | 27 ++++++++++++++++++++++----- > include/linux/console.h | 1 + > include/linux/serial_8250.h | 1 + > kernel/printk/printk.c | 3 +++ > 5 files changed, 36 insertions(+), 5 deletions(-) > -- Andy Shevchenko <andriy.shevche...@linux.intel.com> Intel Finland Oy
