From mboxrd@z Thu Jan  1 00:00:00 1970
From: Marcelo Tosatti <mtosatti@redhat.com>
Subject: Re: Got bash 'Resource temporarily unavailable' when testing
	linux_s3 (kvm)
Date: Fri, 2 Oct 2009 15:00:16 -0300
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References: <20091002094435.GA322@dhcp-66-70-48.nay.redhat.com>
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Cc: autotest@test.kernel.org, kvm@vger.kernel.org, lmr@redhat.com,
	Chen Cao <kcao@redhat.com>
To: Amos Kong <akong@redhat.com>
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On Fri, Oct 02, 2009 at 05:44:35PM +0800, Amos Kong wrote:
> 
> Anybody can help on linux_s3 (kvm autotest)?
> 
> When running the testcase linux_s3 to test kvm, we constantly got
> 'bash: echo: write error: Resource temporarily unavailable'.
> 
> This testcase can be found at
> autotest/client/tests/kvm/tests/linux_s3.py
> (or autotest/client/tests/kvm/kvm_tests.py in the old version).
> 
> The testing command is:
> 'chvt %s && echo mem > /sys/power/state && chvt %s' % (dst_tty,
> src_tty)
> e.g.
> 'chvt 1 && echo mem > /sys/power/state && chvt 7'
> 
> 
> Is there any chance that the 'echo' command is executed before 'chvt
> 1' took full effect? (Just my wild guess.)
> 
> 
> I'll appreciate your help.

There was a bug in virtio-balloon, fixed in 2.6.30, that prevents proper
suspend-to-RAM.

Can you share dmesg output after the failure?