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Re: [Qemu-devel] [PATCHv2] Fix virtio-console failure on unconnected pty
From: |
Alexander Graf |
Subject: |
Re: [Qemu-devel] [PATCHv2] Fix virtio-console failure on unconnected pty |
Date: |
Mon, 2 Jan 2012 17:55:06 +0100 |
On 02.01.2012, at 16:41, Christian Borntraeger wrote:
> On 02/01/12 16:34, Alexander Graf wrote:
>>>> if (ret == -EAGAIN || (ret >= 0 && ret < buf_size)) {
>>>> virtio_serial_throttle_port(port, true);
>>>
>>> Ah; I see what's happening. pty_chr_write() returns 0 if a client
>>> isn't yet connected.
>>>
>>> This is different from the buggy tcp_chr_write() code, which just
>>> returns 'len', i.e. a successful write. And since I've only tested
>>> with tcp/unix sockets, I couldn't see why throttling could get
>>> enabled.
>>
>> So what's the conclusion then? :)
>
> My conclusion is that with my patch virtio-console on a pty works, without
> it doesnt. :-)
> I think Amit said that he is going to apply the patch.
Ah, alright then :)
Alex