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Date: Thu, 29 Sep 2011 19:41:33 +0200
From: Jan Kiszka <jan.kiszka@siemens.com>
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Subject: Re: [Qemu-devel] [PATCH 3/3] Delayed IP packets
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To: Amit Shah <amit.shah@redhat.com>
Cc: Anthony Liguori <aliguori@us.ibm.com>, qemu-devel <qemu-devel@nongnu.org>, Fabien Chouteau <chouteau@adacore.com>

On 2011-09-29 18:06, Amit Shah wrote:
> On (Wed) 03 Aug 2011 [13:24:22], Jan Kiszka wrote:
>> From: Fabien Chouteau <chouteau@adacore.com>
>>
>> In the current implementation, if Slirp tries to send an IP packet to a client
>> with an unknown hardware address, the packet is simply dropped and an ARP
>> request is sent (if_encap in slirp/slirp.c).
>>
>> With this patch, Slirp will send the ARP request, re-queue the packet and try
>> to send it later. The packet is dropped after one second if the ARP reply is
>> not received.
> 
> This patch causes a segfault when guests wake up from hibernate.
> 
> Recipe:
> 1. Start guest with -net user -net nic,model=virtio
> 2. (guest) ping 10.0.2.2
> 3. (guest) echo "disk" > /sys/power/state
> 4. Re-start guest with same command line
> 5. Ping has stopped receiving replies.
> 6. Kill that ping process and start a new one.  qemu segfaults.

Can't reproduce, I'm not getting stable hibernation here even without
any network configured.

Could you check if the recent pull request [1] changes the picture for you?

Thanks,
Jan

[1] http://thread.gmane.org/gmane.comp.emulators.qemu/118992

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