From: "Andreas Färber" <afaerber@suse.de>
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>
Subject: Re: [Qemu-devel] [PATCHv2] Fix virtio-console failure on unconnected pty
Date: Thu, 29 Dec 2011 14:39:22 +0100 [thread overview]
Message-ID: <4EFC6D8A.6080003@suse.de> (raw)
In-Reply-To: <20111229132756.GB4576@amit.redhat.com>
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>
>>
>> when I tried qemu with -virtio-console pty the guest hangs and attaching 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 heavily spinning but get_buf
>> never returns the buffer. There seems to be no way for the console to unthrottle the port.
>
> 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.
>
> I'll adjust the commit log message and submit.
>
> Thanks.
>
> Amit
--
SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg, Germany
GF: Jeff Hawn, Jennifer Guild, Felix Imendörffer; HRB 16746 AG Nürnberg
next prev parent reply other threads:[~2011-12-29 13:40 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-12-15 12:44 [Qemu-devel] [RFC] virtio-console fails on unconnected pty Christian Borntraeger
2011-12-16 9:23 ` Amit Shah
2011-12-29 12:47 ` [Qemu-devel] [PATCHv2] Fix virtio-console failure " Christian Borntraeger
2011-12-29 13:27 ` Amit Shah
2011-12-29 13:39 ` Andreas Färber [this message]
2011-12-29 14:04 ` Amit Shah
2011-12-29 14:16 ` Christian Borntraeger
2011-12-29 14:19 ` Christian Borntraeger
2011-12-29 14:26 ` Amit Shah
2011-12-29 14:32 ` Christian Borntraeger
2011-12-29 14:56 ` Amit Shah
2011-12-29 15:14 ` Christian Borntraeger
2011-12-29 15:14 ` Amit Shah
2012-01-02 15:34 ` Alexander Graf
2012-01-02 15:41 ` Christian Borntraeger
2012-01-02 16:55 ` Alexander Graf
2012-01-03 15:49 ` Amit Shah
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