Hi,
On 01.07.2016 14:31, Dube, Swaraj wrote:
Hi,
I have been trying to get the UART output but according to the documentation I
need the command 'vbetool' , I have been trying for very long to get this
command installed but it has not been possible so far. Libx86.a is incompatible
it says when I make the vbetool. Then I tried to make libx86 rather than just
downloading but the source codes have errors , I reduced the errors to 2 of
them which are :
lrmi.c:399: Error: operand size mismatch for `out'
lrmi.c:367: Error: operand size mismatch
From here I am unsure of how to solve the problem.
I don't think you want this for serial console. For VGA, yes, but not
for serial.
What you want is either a board with a serial port/serial port header,
or PCI expansion card with serial port on it. Then you just plug a null
modem cable and run minicom or alike on another side. For that part, I
use a Linux laptop. They don't have serial port these days, but any
USB-to-serial converter will do the trick. For a garage style, you can
solder one from a decade old cellular phone data cable. :)
Once you get through this, please post what you see in minicom here.
Setting up VGA console may be easier though. I haven't tried it myself,
but I guess you may just install it from the distro's package manager.
HTH,
Valentine
Regards,
Swaraj Dube.
-----Original Message-----
From: [email protected] [mailto:[email protected]] On
Behalf Of Jan Kiszka
Sent: Thursday, June 30, 2016 5:12 PM
To: Dube, Swaraj <[email protected]>; Valentine Sinitsyn
<[email protected]>; Jailhouse <[email protected]>; Hii, Roland
King Guan <[email protected]>
Subject: Re: The Jailhouse is opening: Kernel Panic - not syncing: hung task:
blocked task
On 2016-06-30 11:05, Dube, Swaraj wrote:
Hi,
While starting jailhouse, the kernel panic messages are no longer appearing as well as
"<task>:<pid> took more than 120 seconds", both of these errors are now gone after I
properly loaded the jailhouse kernel module(jailhouse.ko) now I am getting this error: "rcu_sched detected
stalls on CPUs/tasks", this error keeps coming up again and again and eventually freezes, good thing is
there are no kernel panics but however with this error I think the system has frozen and I need to reboot every
time to start over. One solution I can think of is to disable SMP in the GRUB configuration, I'll try that out
meanwhile you can kindly let me know if you have any suggestions on this matter. I have attached a screenshot
of the error I just described.
As I said before:
Please post the output of the serial console that Jailhouse reports to.
Jan
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Embedded Linux
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С уважением,
Синицын Валентин
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