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From: Paolo Bonzini <pbonzini@redhat.com>
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Date: Fri, 24 Mar 2017 12:48:38 +0100
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Subject: Re: [Qemu-devel] qemu-system-s390x tests/boot-serial-test
 intermittent failure
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To: Christian Borntraeger <borntraeger@de.ibm.com>, Peter Maydell <peter.maydell@linaro.org>, QEMU Developers <qemu-devel@nongnu.org>
Cc: Cornelia Huck <cornelia.huck@de.ibm.com>, Thomas Huth <thuth@redhat.com>, =?UTF-8?Q?Alex_Benn=c3=a9e?= <alex.bennee@linaro.org>, Alexander Graf <agraf@suse.de>, Richard Henderson <rth@twiddle.net>



On 24/03/2017 12:11, Christian Borntraeger wrote:
> One idea. Maybe qemu exits before the other side is ready.
> Does reverting
> 
> commit 864111f422babcf8ce837fb47f7f9e1948446f22
> Author:     Christian Borntraeger <borntraeger@de.ibm.com>
> AuthorDate: Tue Oct 18 09:29:54 2016 +0200
> Commit:     Paolo Bonzini <pbonzini@redhat.com>
> CommitDate: Wed Nov 2 09:28:56 2016 +0100
> 
>     vl: exit qemu on guest panic if -no-shutdown is not set
> 
> help?

Didn't test, but this:

> If yes, does 
> diff --git a/tests/boot-serial-test.c b/tests/boot-serial-test.c
> index 57edf6a..11f48b0 100644
> --- a/tests/boot-serial-test.c
> +++ b/tests/boot-serial-test.c
> @@ -79,8 +79,8 @@ static void test_machine(const void *data)
>      g_assert(fd != -1);
>  
>      args = g_strdup_printf("-M %s,accel=tcg -chardev file,id=serial0,path=%s"
> -                           " -serial chardev:serial0 %s", test->machine,
> -                           tmpname, test->extra);
> +                           " -no-shutdown -serial chardev:serial0 %s",
> +                           test->machine, tmpname, test->extra);
>  
>      qtest_start(args);
>      unlink(tmpname);
> 
> also help?

seems to help (survives about 1 minute, while usually it fails in a few
seconds).

Paolo