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Date: Thu, 29 Dec 2011 14:39:22 +0100
From: =?ISO-8859-1?Q?Andreas_F=E4rber?= <afaerber@suse.de>
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Subject: Re: [Qemu-devel] [PATCHv2] Fix virtio-console failure on
 unconnected pty
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To: Amit Shah <amit.shah@redhat.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>, "qemu-devel@nongnu.org" <qemu-devel@nongnu.org>, Alexander Graf <agraf@suse.de>

Am 29.12.2011 14:27, schrieb Amit Shah:
> On (Thu) 29 Dec 2011 [13:47:43], Christian Borntraeger wrote:
>> From: Christian Borntraeger <borntraeger@de.ibm.com>
>>    =20
>> when I tried qemu with -virtio-console pty the guest hangs and attachi=
ng on /dev/pts/<x> does
>> not return anything if the attachement is too late.

"attachment", while you're at it.

Andreas

>> Turns out that the console is already throttled and the guest is heavi=
ly spinning but get_buf
>> never returns the buffer. There seems to be no way for the console to =
unthrottle the port.
>=20
> It doesn't really get throttled, since the throttling
> enabling/disabling isn't yet done in QEMU.  What happens is that the
> chardev buffer gets filled up and qemu_chr_fe_write() doesn't return
> -- send_all() keeps spinning.
>=20
> I'll adjust the commit log message and submit.
>=20
> Thanks.
>=20
> 		Amit

--=20
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