linux-kernel - Re: [PATCH] print kdump kernel loaded status in stack dump

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Message-ID: <20180118135704.62d0f79f@gandalf.local.home>
Date:   Thu, 18 Jan 2018 13:57:04 -0500
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Andi Kleen <ak@...ux.intel.com>
Cc:     Dave Young <dyoung@...hat.com>, pmladek@...e.com,
        sergey.senozhatsky@...il.com, linux-kernel@...r.kernel.org,
        akpm@...ux-foundation.org, kexec@...ts.infradead.org
Subject: Re: [PATCH] print kdump kernel loaded status in stack dump

On Thu, 18 Jan 2018 10:02:17 -0800
Andi Kleen <ak@...ux.intel.com> wrote:

> Dave Young <dyoung@...hat.com> writes:
> >  		printk("%sHardware name: %s\n",
> >  		       log_lvl, dump_stack_arch_desc_str);
> > +	if (kexec_crash_loaded())
> > +		printk("%skdump kernel loaded\n", log_lvl);  
> 
> Oops/warnings are getting longer and longer, often scrolling away
> from the screen, and if the kernel crashes backscroll does not work
> anymore, so precious information is lost.
> 
> Can you merge it with some other line?
> 
> Just a [KDUMP] or so somewhere should be good enough.

Or perhaps we should add it as a TAINT. Not all taints are bad.

-- Steve