Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
Subject: Re: [PATCH 0/2] printk: replace ringbuffer
To:     Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>,
        John Ogness <john.ogness@linutronix.de>
Cc:     Petr Mladek <pmladek@suse.com>,
        Peter Zijlstra <peterz@infradead.org>,
        Sergey Senozhatsky <sergey.senozhatsky@gmail.com>,
        Steven Rostedt <rostedt@goodmis.org>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Andrea Parri <parri.andrea@gmail.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        kexec@lists.infradead.org, linux-kernel@vger.kernel.org
References: <20200128161948.8524-1-john.ogness@linutronix.de>
 <dc4ca9b5-d2a2-03af-c186-204a3aad2399@redhat.com>
 <20200205044848.GH41358@google.com> <20200205050204.GI41358@google.com>
 <88827ae2-7af5-347b-29fb-cffb94350f8f@redhat.com>
 <20200205063640.GJ41358@google.com>
From:   lijiang <lijiang@redhat.com>
Message-ID: <05bdb038-46dc-2939-60e5-7fda2877fa2e@redhat.com>
Date:   Wed, 5 Feb 2020 17:36:41 +0800
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101
 Thunderbird/52.9.1
MIME-Version: 1.0
In-Reply-To: <20200205063640.GJ41358@google.com>
Content-Type: text/plain; charset=windows-1252
Content-Language: en-US
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

> On (20/02/05 13:38), lijiang wrote:
>>> On (20/02/05 13:48), Sergey Senozhatsky wrote:
>>>> On (20/02/05 12:25), lijiang wrote:
> 
> [..]
> 
>>>>
>>>> So there is a General protection fault. That's the type of a problem that
>>>> kills the boot for me as well (different backtrace, tho).
>>>
>>> Do you have CONFIG_RELOCATABLE and CONFIG_RANDOMIZE_BASE (KASLR) enabled?
>>>
>>
>> Yes. These two options are enabled.
>>
>> CONFIG_RELOCATABLE=y
>> CONFIG_RANDOMIZE_BASE=y
> 
> So KASLR kills the boot for me. So does KASAN.
> 
For my side, after adding the option 'nokaslr' to kernel command line, I still have the
previously mentioned problem, finally, kernel failed to boot.

Thanks.

> John, do you see any of these problems on your test machine?
> 
> 	-ss
>