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Re: [Qemu-devel] [Bug 1653063] [NEW] qemu-system-arm hangs with -icount


From: Andrew Jones
Subject: Re: [Qemu-devel] [Bug 1653063] [NEW] qemu-system-arm hangs with -icount and -nodefaults
Date: Thu, 29 Dec 2016 11:04:20 +0100
User-agent: Mutt/1.6.0.1 (2016-04-01)

On Thu, Dec 29, 2016 at 08:02:16AM -0000, Hansni Bu wrote:
> Public bug reported:
...
> https://bugs.launchpad.net/bugs/1653063
...
>   After console prints the message below:
>   "Uncompressing 
> Linux..........................................................................
>  done, booting the kernel."
>   there's no further action noticed.
> 
>   If "-icount" is not set, namely run as:
>   qemu-system-arm -M integratorcp -kernel arm-test/zImage.integrator -initrd 
> arm-test/arm_root.img -nographic -nodefaults -chardev stdio,mux=on,id=char0 
> -serial chardev:char0 --append "console=ttyAMA0"
> 
>   or if "-nodefaults" is not set, namely run as:
>   qemu-system-arm -M integratorcp -kernel arm-test/zImage.integrator -initrd 
> arm-test/arm_root.img -nographic -icount 1 --append "console=ttyAMA0"
> 
>   The Linux boot procedure can finish successfully.

Hi Hansni,

The fact things work when you remove -nodefaults is a sign that with it
your single cpu may just not be getting scheduled again. Does the patch
from Alex Bennée here[*] help?

drew

[*] https://lists.gnu.org/archive/html/qemu-devel/2016-11/msg01743.html



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