From: Julien Grall <julien.grall@linaro.org>
To: manish jaggi <manishjaggi.oss@gmail.com>,
stefano.stabellini@citrix.com, xen-devel@lists.xenproject.org,
Vijay Kilari <vijay.kilari@gmail.com>,
manish.jaggi@caviumnetworks.com
Subject: Re: How to display dom0 kernel printk on hvc0
Date: Thu, 07 Aug 2014 15:05:37 +0100 [thread overview]
Message-ID: <53E387B1.3050300@linaro.org> (raw)
In-Reply-To: <CAAiw7Jng4EpmUaJrSu1Go8ffEnkAUU6Mqk63rQFENTwuPEryGw@mail.gmail.com>
Hello,
On 08/07/2014 09:23 AM, manish jaggi wrote:
> I am debugging a kernel crash when I start xencommons. If I add prints
> in kernel the prints are only visible in dmesg and not on dom0 console.
> This makes it difficult to view kernel printks at the time of crash.
>
> I tried xen_raw_printks but the print only comes when you press a key,
> so while a crash is happening you cannot press a key.
>
> Is there a way to enable printks on hvc0
every printk in the kernel should be printed in hvc if you pass
console=hvc0 on the kernel command line.
You may also have to add ignore_loglevel
Regards,
--
Julien Grall
prev parent reply other threads:[~2014-08-07 14:05 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-08-07 8:23 How to display dom0 kernel printk on hvc0 manish jaggi
2014-08-07 12:44 ` Stefano Stabellini
2014-08-07 13:01 ` manish jaggi
2014-08-07 14:36 ` Stefano Stabellini
2014-08-07 14:52 ` Julien Grall
2014-08-07 15:01 ` David Vrabel
2014-08-07 15:43 ` manish jaggi
2014-08-07 14:05 ` Julien Grall [this message]
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