From: Paolo Bonzini <pbonzini@redhat.com>
To: Stefan Berger <stefanb@linux.vnet.ibm.com>
Cc: "qemu-devel@nongnu.org" <qemu-devel@nongnu.org>,
"H. Peter Anvin" <hpa@zytor.com>
Subject: Re: [Qemu-devel] virtio-rng and fd passing
Date: Fri, 01 Mar 2013 21:41:29 +0100 [thread overview]
Message-ID: <51311279.8040804@redhat.com> (raw)
In-Reply-To: <51310BD6.20708@linux.vnet.ibm.com>
Il 01/03/2013 21:13, Stefan Berger ha scritto:
> On 03/01/2013 02:37 PM, H. Peter Anvin wrote:
>> On 02/28/2013 04:36 PM, Eric Blake wrote:
>>> Stefan Berger and I discovered on IRC that virtio-rng is unable to
>>> support fd passing. We attempted:
>>>
>>> qemu-system-x86_64 ... -add-fd
>>> set=4,fd=34,opaque=RDONLY:/dev/urandom
>> ^^^^^^^^^^^^
>>> -object rng-random,id=rng0,filename=/dev/fdset/4 -device
>>> virtio-rng-pci,rng=rng0,bus=pci.0,addr=0x6
>>>
>> Unrelated, but you really, really, really don't want to pass
>> /dev/urandom there, use /dev/random.
>
> From what I am reading about /dev/random is that it will start blocking
> once not enough entropy is available anymore.
Yes, and the purpose of virtio-rng is not to provide fancy random
numbers. It's to provide actual entropy.
Paolo
next prev parent reply other threads:[~2013-03-01 20:41 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <512FF819.7050505@redhat.com>
2013-03-01 9:51 ` [Qemu-devel] virtio-rng and fd passing Paolo Bonzini
2013-03-04 4:29 ` Amit Shah
2013-03-06 6:20 ` Amit Shah
2013-03-01 19:37 ` H. Peter Anvin
2013-03-01 20:13 ` Stefan Berger
2013-03-01 20:15 ` H. Peter Anvin
2013-03-01 20:41 ` Paolo Bonzini [this message]
2013-03-01 20:04 ` Anthony Liguori
2013-03-01 20:34 ` Stefan Berger
2013-03-01 21:08 ` Anthony Liguori
2013-03-01 21:13 ` Eric Blake
2013-03-01 23:05 ` Anthony Liguori
2013-03-01 23:14 ` Eric Blake
2013-03-01 23:59 ` Anthony Liguori
2013-03-02 0:29 ` Eric Blake
2013-03-02 3:13 ` Anthony Liguori
2013-03-02 12:23 ` Paolo Bonzini
2013-03-03 21:05 ` Anthony Liguori
2013-03-04 21:57 ` Eric Blake
2013-03-04 22:24 ` Anthony Liguori
2013-03-04 22:35 ` Eric Blake
2013-03-05 4:44 ` H. Peter Anvin
2013-03-04 21:54 ` Eric Blake
2013-03-02 0:34 ` Stefan Berger
2013-03-02 3:17 ` Anthony Liguori
2013-03-02 3:34 ` Stefan Berger
2013-03-03 21:06 ` Anthony Liguori
2013-03-04 15:27 ` Corey Bryant
2013-03-04 10:29 ` Daniel P. Berrange
2013-03-04 15:55 ` Corey Bryant
2013-03-01 22:59 ` Peter Krempa
2013-03-01 23:14 ` Anthony Liguori
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