From: Rusty Russell <rusty@rustcorp.com.au>
To: Anthony Liguori <aliguori@us.ibm.com>,
"Michael S. Tsirkin" <mst@redhat.com>,
Paolo Bonzini <pbonzini@redhat.com>
Cc: Stefan Hajnoczi <stefanha@gmail.com>,
qemu-devel@nongnu.org, Stefan Hajnoczi <stefanha@redhat.com>
Subject: Re: [Qemu-devel] [PATCHv2] virtio: verify that all outstanding buffers are flushed
Date: Fri, 14 Dec 2012 11:36:30 +1030 [thread overview]
Message-ID: <8738z94f3d.fsf@rustcorp.com.au> (raw)
In-Reply-To: <87bodzrm4z.fsf@codemonkey.ws>
Anthony Liguori <aliguori@us.ibm.com> writes:
> Yes, take a look at the series I sent out that scrubs all of this to
> just send the index and the addresses of the element.
>
> We technically should save the addresses and sizes too. It makes it a
> heck of a lot safer then re-reading guest memory since we do some
> validation on the size of the sg elements.
Not really.
The guest puts the descriptors in the ring and leaves them there until
the device acks. If it changes them once they're exposed but before
they're acked, it can get either before or after version, and always
could.
Cheers,
Rusty.
next prev parent reply other threads:[~2012-12-14 3:51 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-12 10:51 [Qemu-devel] [PATCHv2] virtio: verify that all outstanding buffers are flushed Michael S. Tsirkin
2012-12-12 13:50 ` Stefan Hajnoczi
2012-12-12 14:01 ` Paolo Bonzini
2012-12-12 14:30 ` Michael S. Tsirkin
2012-12-12 14:36 ` Paolo Bonzini
2012-12-12 14:47 ` Michael S. Tsirkin
2012-12-12 15:01 ` Paolo Bonzini
2012-12-12 15:25 ` Michael S. Tsirkin
2012-12-12 15:52 ` Paolo Bonzini
2012-12-12 16:37 ` Michael S. Tsirkin
2012-12-12 16:51 ` Paolo Bonzini
2012-12-12 17:14 ` Michael S. Tsirkin
2012-12-12 17:39 ` Paolo Bonzini
2012-12-12 19:23 ` Michael S. Tsirkin
2012-12-12 21:00 ` Paolo Bonzini
2012-12-12 21:19 ` Michael S. Tsirkin
2012-12-12 21:33 ` Anthony Liguori
2012-12-12 21:51 ` Michael S. Tsirkin
2012-12-14 1:06 ` Rusty Russell [this message]
2012-12-14 7:51 ` Paolo Bonzini
2012-12-16 20:36 ` Anthony Liguori
2012-12-13 7:39 ` Paolo Bonzini
2012-12-13 10:48 ` Kevin Wolf
2012-12-16 16:14 ` Michael S. Tsirkin
2012-12-12 14:26 ` Michael S. Tsirkin
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