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Date: Tue, 14 May 2013 13:55:06 +0200
From: Paolo Bonzini <pbonzini@redhat.com>
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Subject: Re: [Qemu-devel] [Bug 1179731] [NEW] is networking broken on
	windows hosts?
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Cc: Bug 1179731 <1179731@bugs.launchpad.net>, TeLeMan <geleman@gmail.com>, qemu-devel <qemu-devel@nongnu.org>, Fabien Chouteau <chouteau@adacore.com>, Stefan Hajnoczi <stefanha@gmail.com>

Il 14/05/2013 13:48, Paolo Bonzini ha scritto:
> Il 14/05/2013 13:39, TeLeMan ha scritto:
>> On Tue, May 14, 2013 at 6:46 PM, Paolo Bonzini <pbonzini@redhat.com> wrote:
>>> Il 14/05/2013 12:24, TeLeMan ha scritto:
>>>> On Tue, May 14, 2013 at 3:51 PM, Stefan Hajnoczi <stefanha@gmail.com> wrote:
>>>>> On Tue, May 14, 2013 at 12:02:24AM -0000, therock247uk wrote:
>>>>>> just wondering as i just compiled the latest git and qemu goes into none
>>>>>> responding mode when i try to do any networking stuff on guests (both
>>>>>> linux and windows)
>>>>>
>>>>> Works for me on qemu.git/master on Linux:
>>>>>
>>>>>   $ git rev-parse HEAD
>>>>>   b087143b4d010451208264b7c841436aafe1cbb1
>>>>>   $ x86_64-softmmu/qemu-system-x86_64 -m 1024 -enable-kvm -cpu host \
>>>>>           -drive if=virtio,cache=none,file=test.img
>>>>>
>>>>> Please include more information, like the QEMU command-line and commit
>>>>> ID.
>>>>>
>>>>> Stefan
>>>>>
>>>>
>>>> This regression occurs on the Windows host. SLIRP hangs in sorecvfrom().
>>>
>>> Can you bisect it?
>>>
>>> Paolo
>>>
>> The first break is the commit
>> 5e3bc735d93dd23f074b5116fd11e1ad8cd4962f. But it need more packets
>> than HEAD to reproduce this regression.
> 
> Please check if this partial revert of that commit fixes it:

Yeah, this should work...  WSAEventSelect is edge-triggered and the
event will not be signaled if the socket handler does not consume all
the data in the socket buffer.

Paolo