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| author | Dave Young <dyoung@redhat.com> | 2018-01-27 12:11:29 +0800 |
|---|---|---|
| committer | Petr Mladek <pmladek@suse.com> | 2018-02-08 14:47:25 +0100 |
| commit | 097114aa6eb2aa206c8cf136de77ebffe424234c (patch) | |
| tree | 4edbef479758ff191461e1f5ac218bdbf217bea4 /kernel/printk | |
| parent | ab486bc9a591689f3ac2b6ebc072309371f8f451 (diff) | |
| download | op-kernel-dev-097114aa6eb2aa206c8cf136de77ebffe424234c.zip op-kernel-dev-097114aa6eb2aa206c8cf136de77ebffe424234c.tar.gz | |
print kdump kernel loaded status in stack dump
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.
Link: http://lkml.kernel.org/r/20180127041129.GA29016@dhcp-128-65.nay.redhat.com
To: Steven Rostedt <rostedt@goodmis.org>
To: Andi Kleen <ak@linux.intel.com>
To: kexec@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Cc: akpm@linux-foundation.org
Cc: kexec@lists.infradead.org
Signed-off-by: Dave Young <dyoung@redhat.com>
Reviewed-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Petr Mladek <pmladek@suse.com>
Diffstat (limited to 'kernel/printk')
| -rw-r--r-- | kernel/printk/printk.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c index db4b9b8..fa3de5f 100644 --- a/kernel/printk/printk.c +++ b/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> @@ -3287,9 +3288,11 @@ void __init dump_stack_set_arch_desc(const char *fmt, ...) */ 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); |
