Commit 097114aa authored Jan 27, 2018 by Dave Young Committed by Petr Mladek Feb 08, 2018

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>

parent ab486bc9

kernel/printk/printk.c

+5 −2

Original line number	Diff line number	Diff line
		@@ -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);

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