From mboxrd@z Thu Jan  1 00:00:00 1970
From: manish jaggi <manishjaggi.oss@gmail.com>
Subject: How to display dom0 kernel printk on hvc0
Date: Thu, 7 Aug 2014 13:53:37 +0530
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Hi Stefano,

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
OR
is there a way to dump __logbuf of linux from xen shell.

-Regards
Manish

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<div dir=3D"ltr"><div>Hi Stefano,<br></div><div><br></div><div>I am debuggi=
ng a kernel crash when I start xencommons. If I add prints in kernel the pr=
ints are only visible in dmesg and not on dom0 console. This makes it diffi=
cult to view kernel printks at the time of crash.</div>
<div><br></div><div>I tried xen_raw_printks but the print only comes when y=
ou press a key, so while a crash is happening you cannot press a key.</div>=
<div><br></div><div>Is there a way to enable printks on hvc0=C2=A0</div><di=
v>
OR</div><div>is there a way to dump __logbuf of linux from xen shell.</div>=
<div><br></div><div>-Regards</div><div>Manish</div></div>

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