Messages in this thread Patch in this message | | | Date | Sat, 27 Jan 2018 12:11:29 +0800 | From | Dave Young <> | Subject | [PATCH V2] print kdump kernel loaded status in stack dump |
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It is useful to print kdump kernel loaded status in dump_stack() especially when panic happens so that we can differenciate kdump kernel early hang and a normal panic in a bug report.
Signed-off-by: Dave Young <dyoung@redhat.com> --- [v1 -> v2] merge the status in other line as Andi Kleen suggested kernel/printk/printk.c | 3 +++ --- kernel/printk/printk.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)
--- linux-x86.orig/kernel/printk/printk.c +++ linux-x86/kernel/printk/printk.c @@ -48,6 +48,7 @@ #include <linux/sched/clock.h> #include <linux/sched/debug.h> #include <linux/sched/task_stack.h> +#include <linux/kexec.h> #include <linux/uaccess.h> #include <asm/sections.h> @@ -3118,9 +3119,11 @@ void __init dump_stack_set_arch_desc(con */ void dump_stack_print_info(const char *log_lvl) { - printk("%sCPU: %d PID: %d Comm: %.20s %s %s %.*s\n", + printk("%sCPU: %d PID: %d Comm: %.20s %s%s %s %.*s\n", log_lvl, raw_smp_processor_id(), current->pid, current->comm, - print_tainted(), init_utsname()->release, + kexec_crash_loaded() ? "Kdump: loaded " : "", + print_tainted(), + init_utsname()->release, (int)strcspn(init_utsname()->version, " "), init_utsname()->version);
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