From: Andi Kleen <ak@linux.intel.com>
To: Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>
Cc: pmladek@suse.com, kexec@lists.infradead.org,
linux-kernel@vger.kernel.org, rostedt@goodmis.org,
sergey.senozhatsky@gmail.com, akpm@linux-foundation.org,
Dave Young <dyoung@redhat.com>
Subject: Re: [PATCH] print kdump kernel loaded status in stack dump
Date: Fri, 19 Jan 2018 08:16:04 -0800 [thread overview]
Message-ID: <20180119161604.GH7844@tassilo.jf.intel.com> (raw)
In-Reply-To: <20180119054538.GA484@jagdpanzerIV>
On Fri, Jan 19, 2018 at 02:45:38PM +0900, Sergey Senozhatsky wrote:
> On (01/18/18 10:02), Andi Kleen wrote:
> > Dave Young <dyoung@redhat.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.
>
> true. I even ended up having a console_reflush_on_panic() function. it
> simply re-prints with a delay [so I can at least read the oops] logbuf
> entries every once in a while, staring with the first oops_in_progress
> record.
It would be better to make scrollback work even after panic (e.g. with a polled
keyboard driver)
-Andi
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WARNING: multiple messages have this Message-ID (diff)
From: Andi Kleen <ak@linux.intel.com>
To: Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>
Cc: Dave Young <dyoung@redhat.com>,
pmladek@suse.com, sergey.senozhatsky@gmail.com,
rostedt@goodmis.org, linux-kernel@vger.kernel.org,
akpm@linux-foundation.org, kexec@lists.infradead.org
Subject: Re: [PATCH] print kdump kernel loaded status in stack dump
Date: Fri, 19 Jan 2018 08:16:04 -0800 [thread overview]
Message-ID: <20180119161604.GH7844@tassilo.jf.intel.com> (raw)
In-Reply-To: <20180119054538.GA484@jagdpanzerIV>
On Fri, Jan 19, 2018 at 02:45:38PM +0900, Sergey Senozhatsky wrote:
> On (01/18/18 10:02), Andi Kleen wrote:
> > Dave Young <dyoung@redhat.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.
>
> true. I even ended up having a console_reflush_on_panic() function. it
> simply re-prints with a delay [so I can at least read the oops] logbuf
> entries every once in a while, staring with the first oops_in_progress
> record.
It would be better to make scrollback work even after panic (e.g. with a polled
keyboard driver)
-Andi
next prev parent reply other threads:[~2018-01-19 16:16 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-17 4:50 [PATCH] print kdump kernel loaded status in stack dump Dave Young
2018-01-17 4:50 ` Dave Young
2018-01-17 8:57 ` Petr Mladek
2018-01-17 8:57 ` Petr Mladek
2018-01-17 12:32 ` Dave Young
2018-01-17 12:32 ` Dave Young
2018-01-17 13:42 ` Petr Mladek
2018-01-17 13:42 ` Petr Mladek
2018-01-17 15:48 ` Steven Rostedt
2018-01-17 15:48 ` Steven Rostedt
2018-01-18 1:57 ` Dave Young
2018-01-18 1:57 ` Dave Young
2018-01-18 18:02 ` Andi Kleen
2018-01-18 18:02 ` Andi Kleen
2018-01-18 18:57 ` Steven Rostedt
2018-01-18 18:57 ` Steven Rostedt
2018-01-19 4:47 ` Dave Young
2018-01-19 4:47 ` Dave Young
2018-01-19 13:06 ` Petr Tesarik
2018-01-26 7:37 ` Dave Young
2018-01-26 7:37 ` Dave Young
2018-01-26 12:17 ` Petr Mladek
2018-01-26 12:17 ` Petr Mladek
2018-01-27 3:57 ` Dave Young
2018-01-27 3:57 ` Dave Young
2018-01-19 5:45 ` Sergey Senozhatsky
2018-01-19 5:45 ` Sergey Senozhatsky
2018-01-19 8:16 ` Dave Young
2018-01-19 8:16 ` Dave Young
2018-01-19 8:28 ` Sergey Senozhatsky
2018-01-19 8:28 ` Sergey Senozhatsky
2018-01-19 8:42 ` Dave Young
2018-01-19 8:42 ` Dave Young
2018-01-19 9:46 ` Sergey Senozhatsky
2018-01-19 9:46 ` Sergey Senozhatsky
2018-01-19 8:32 ` Sergey Senozhatsky
2018-01-19 8:32 ` Sergey Senozhatsky
2018-01-19 16:16 ` Andi Kleen [this message]
2018-01-19 16:16 ` Andi Kleen
2018-01-19 16:51 ` Petr Tesarik
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