From: "Michael S. Tsirkin" <mst@redhat.com>
To: Gregory Haskins <gregory.haskins@gmail.com>
Cc: Avi Kivity <avi@redhat.com>,
"Ira W. Snyder" <iws@ovro.caltech.edu>,
netdev@vger.kernel.org,
virtualization@lists.linux-foundation.org, kvm@vger.kernel.org,
linux-kernel@vger.kernel.org, mingo@elte.hu, linux-mm@kvack.org,
akpm@linux-foundation.org, hpa@zytor.com,
Rusty Russell <rusty@rustcorp.com.au>,
s.hetze@linux-ag.com, alacrityvm-devel@lists.sourceforge.net
Subject: Re: [PATCHv5 3/3] vhost_net: a kernel-level virtio server
Date: Thu, 17 Sep 2009 06:57:17 +0300 [thread overview]
Message-ID: <20090917035717.GB3088@redhat.com> (raw)
In-Reply-To: <4AB0F1EF.5050102@gmail.com>
On Wed, Sep 16, 2009 at 10:10:55AM -0400, Gregory Haskins wrote:
> > There is no role reversal.
>
> So if I have virtio-blk driver running on the x86 and vhost-blk device
> running on the ppc board, I can use the ppc board as a block-device.
> What if I really wanted to go the other way?
It seems ppc is the only one that can initiate DMA to an arbitrary
address, so you can't do this really, or you can by tunneling each
request back to ppc, or doing an extra data copy, but it's unlikely to
work well.
The limitation comes from hardware, not from the API we use.
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next prev parent reply other threads:[~2009-09-17 3:57 UTC|newest]
Thread overview: 83+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <cover.1251388414.git.mst@redhat.com>
2009-08-27 16:06 ` [PATCHv5 1/3] mm: export use_mm/unuse_mm to modules Michael S. Tsirkin
2009-08-28 15:31 ` Gregory Haskins
2009-08-27 16:07 ` [PATCHv5 2/3] mm: reduce atomic use on use_mm fast path Michael S. Tsirkin
2009-08-27 16:07 ` [PATCHv5 3/3] vhost_net: a kernel-level virtio server Michael S. Tsirkin
2009-09-03 18:39 ` Ira W. Snyder
2009-09-07 10:15 ` Michael S. Tsirkin
2009-09-08 17:20 ` Ira W. Snyder
2009-09-08 20:14 ` Michael S. Tsirkin
2009-09-11 15:17 ` Xin, Xiaohui
2009-09-13 5:46 ` Michael S. Tsirkin
2009-09-14 5:57 ` Xin, Xiaohui
2009-09-14 7:05 ` Michael S. Tsirkin
2009-09-11 16:00 ` Gregory Haskins
2009-09-11 16:14 ` Gregory Haskins
2009-09-13 12:01 ` Michael S. Tsirkin
2009-09-14 16:08 ` Gregory Haskins
2009-09-14 16:47 ` Michael S. Tsirkin
2009-09-14 19:14 ` Gregory Haskins
2009-09-15 12:35 ` Avi Kivity
2009-09-15 13:03 ` Gregory Haskins
2009-09-15 13:25 ` Avi Kivity
2009-09-15 13:50 ` Gregory Haskins
2009-09-15 14:28 ` Michael S. Tsirkin
2009-09-15 15:03 ` Avi Kivity
2009-09-15 20:08 ` Gregory Haskins
2009-09-15 20:40 ` Michael S. Tsirkin
2009-09-15 20:43 ` Gregory Haskins
2009-09-15 21:25 ` Michael S. Tsirkin
2009-09-15 21:39 ` Gregory Haskins
2009-09-15 21:38 ` Michael S. Tsirkin
2009-09-15 21:55 ` Gregory Haskins
2009-09-16 14:57 ` Arnd Bergmann
2009-09-16 15:13 ` Michael S. Tsirkin
2009-09-16 15:22 ` Arnd Bergmann
2009-09-16 16:08 ` Michael S. Tsirkin
2009-09-16 8:23 ` Avi Kivity
2009-09-16 11:44 ` Gregory Haskins
2009-09-16 13:05 ` Avi Kivity
2009-09-16 14:10 ` Gregory Haskins
2009-09-16 15:59 ` Avi Kivity
2009-09-16 19:22 ` Gregory Haskins
2009-09-16 21:00 ` Avi Kivity
2009-09-17 3:11 ` Gregory Haskins
2009-09-17 7:49 ` Avi Kivity
2009-09-17 14:16 ` Javier Guerra
2009-09-21 21:43 ` Ira W. Snyder
2009-09-22 9:43 ` Avi Kivity
2009-09-22 15:25 ` Ira W. Snyder
2009-09-22 15:56 ` Avi Kivity
2009-09-23 14:26 ` Gregory Haskins
2009-09-23 14:37 ` Avi Kivity
2009-09-23 15:10 ` Gregory Haskins
2009-09-23 17:58 ` Gregory Haskins
2009-09-23 19:37 ` Avi Kivity
2009-09-23 21:15 ` Gregory Haskins
2009-09-24 7:18 ` Avi Kivity
2009-09-24 18:03 ` Gregory Haskins
2009-09-25 8:22 ` Avi Kivity
2009-09-25 21:32 ` Gregory Haskins
2009-09-27 9:43 ` Avi Kivity
2009-09-30 20:04 ` Gregory Haskins
2009-10-01 8:34 ` Avi Kivity
2009-10-01 9:28 ` Michael S. Tsirkin
2009-10-01 19:24 ` Gregory Haskins
2009-10-03 10:00 ` Avi Kivity
2009-09-24 19:27 ` Ira W. Snyder
2009-09-25 7:43 ` Avi Kivity
2009-09-24 8:03 ` Avi Kivity
2009-09-24 18:04 ` Gregory Haskins
2009-09-17 3:57 ` Michael S. Tsirkin [this message]
2009-09-17 4:13 ` Gregory Haskins
2009-09-15 12:32 ` Avi Kivity
2009-09-14 16:53 ` Michael S. Tsirkin
2009-09-14 19:28 ` Gregory Haskins
2009-09-25 17:01 ` Ira W. Snyder
2009-09-27 7:43 ` Michael S. Tsirkin
[not found] <E88DD564E9DC5446A76B2B47C3BCCA150219600F9B@pdsmsx503.ccr.corp.intel.com>
2009-08-31 11:42 ` Xin, Xiaohui
2009-08-31 15:23 ` Arnd Bergmann
2009-09-01 14:58 ` Xin, Xiaohui
2009-08-31 17:52 ` Avi Kivity
2009-08-31 21:56 ` Anthony Liguori
2009-09-01 15:37 ` Xin, Xiaohui
2009-09-01 5:04 ` Xin, Xiaohui
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