Messages in this thread | | | From | Bernhard Walle <> | Subject | Always print panic message on current console | Date | Sat, 10 Oct 2009 22:51:05 +0200 |
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The kernel offers with TIOCL_GETKMSGREDIRECT ioctl() the possibility to redirect the kernel messages to a specific console.
However, since it's not possible to switch to the kernel message console after a panic(), it would be nice if the kernel would print the panic message on the current console.
As suggested by Andrew, this patch series adds a new interface to access the global kmsg_redirect variable by a function to be able to use it in code where CONFIG_VT_CONSOLE is not set (kernel/panic.c).
The patch series makes kmsg_redirect a static variable and all kernel code outside of vt.c accesses that variable by the vt_set_kmsg_redirect() and vt_get_kmsg_redirect() functions.
Signed-off-by: Bernhard Walle <bernhard@bwalle.de>
--- drivers/char/vt.c | 41 ++++++++++++++++++++++++++++++++++++++++- include/linux/tty.h | 2 -- include/linux/vt.h | 18 ++++++++++++++++++ kernel/panic.c | 4 ++++ kernel/power/console.c | 8 ++++---- 5 files changed, 66 insertions(+), 7 deletions(-)
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