On Thu, Dec 21, 2023 at 07:09:53PM +0530, Sreenath Vijayan wrote: > When terminal is unresponsive, one cannot use dmesg to view kernel > ring buffer messages. Also, syslog services may be disabled, > to check them after a reboot, especially on embedded systems. > In this scenario, dump the kernel ring buffer messages via sysrq > by pressing sysrq+D. > > Signed-off-by: Sreenath Vijayan <sreenath.vijayan@xxxxxxxx> > Signed-off-by: Shimoyashiki Taichi <taichi.shimoyashiki@xxxxxxxx> > --- > Documentation/admin-guide/sysrq.rst | 2 ++ > drivers/tty/sysrq.c | 43 ++++++++++++++++++++++++++++- > 2 files changed, 44 insertions(+), 1 deletion(-) > > diff --git a/Documentation/admin-guide/sysrq.rst b/Documentation/admin-guide/sysrq.rst > index 2f2e5bd440f9..464c4e138b9d 100644 > --- a/Documentation/admin-guide/sysrq.rst > +++ b/Documentation/admin-guide/sysrq.rst > @@ -161,6 +161,8 @@ Command Function > will be printed to your console. (``0``, for example would make > it so that only emergency messages like PANICs or OOPSes would > make it to your console.) > + > +``D`` Dump the kernel ring buffer > =========== =================================================================== Nit, this doesn't line up anymore :(
