-Original Message-
From: Randy Dunlap [mailto:randy.dun...@oracle.com]
Sent: Thursday, December 02, 2010 1:54 AM
To: Xin, Xiaohui
Cc: net...@vger.kernel.org; kvm@vger.kernel.org; linux-ker...@vger.kernel.org;
m...@redhat.com; mi...@elte.hu; da...@davemloft.net;
herb
-Original Message-
From: kvm-ow...@vger.kernel.org [mailto:kvm-ow...@vger.kernel.org] On Behalf
Of Xin,
Xiaohui
Sent: Thursday, November 11, 2010 4:28 PM
To: David Miller
Cc: net...@vger.kernel.org; kvm@vger.kernel.org; linux-ker...@vger.kernel.org;
m...@redhat.com; mi...@elte.hu; herb
-Original Message-
From: David Miller [mailto:da...@davemloft.net]
Sent: Thursday, November 11, 2010 1:47 AM
To: Xin, Xiaohui
Cc: net...@vger.kernel.org; kvm@vger.kernel.org; linux-ker...@vger.kernel.org;
m...@redhat.com; mi...@elte.hu; herb...@gondor.apana.org.au;
jd...@linux.intel.com
-Original Message-
From: Eric Dumazet [mailto:eric.duma...@gmail.com]
Sent: Monday, November 08, 2010 4:25 PM
To: Xin, Xiaohui
Cc: net...@vger.kernel.org; kvm@vger.kernel.org; linux-ker...@vger.kernel.org;
m...@redhat.com; mi...@elte.hu; da...@davemloft.net;
herb...@gondor.apana.org.au
I have addressed this issue in v14 patch set.
Thanks
Xiaohui
-Original Message-
From: David Miller [mailto:da...@davemloft.net]
Sent: Saturday, October 30, 2010 4:29 AM
To: Xin, Xiaohui
Cc: net...@vger.kernel.org; kvm@vger.kernel.org; linux-ker...@vger.kernel.org;
m...@redhat.com; mi
-Original Message-
From: David Miller [mailto:da...@davemloft.net]
Sent: Tuesday, October 19, 2010 11:24 PM
To: Xin, Xiaohui
Cc: net...@vger.kernel.org; kvm@vger.kernel.org; linux-ker...@vger.kernel.org;
m...@redhat.com; mi...@elte.hu; herb...@gondor.apana.org.au;
jd...@linux.intel.com
-Original Message-
From: Michael S. Tsirkin [mailto:m...@redhat.com]
Sent: Sunday, October 03, 2010 9:13 PM
To: Xin, Xiaohui
Cc: net...@vger.kernel.org; kvm@vger.kernel.org; linux-ker...@vger.kernel.org;
mi...@elte.hu; da...@davemloft.net; herb...@gondor.hengli.com.au;
jd
-Original Message-
From: David Miller [mailto:da...@davemloft.net]
Sent: Friday, October 01, 2010 3:15 PM
To: Xin, Xiaohui
Cc: net...@vger.kernel.org; kvm@vger.kernel.org; linux-ker...@vger.kernel.org;
m...@redhat.com; mi...@elte.hu; herb...@gondor.apana.org.au;
jd...@linux.intel.com
-Original Message-
From: Eric Dumazet [mailto:eric.duma...@gmail.com]
Sent: Thursday, September 30, 2010 10:22 PM
To: Xin, Xiaohui
Cc: net...@vger.kernel.org; kvm@vger.kernel.org; linux-ker...@vger.kernel.org;
m...@redhat.com; mi...@elte.hu; da...@davemloft.net;
herb
-Original Message-
From: Eric Dumazet [mailto:eric.duma...@gmail.com]
Sent: Monday, October 11, 2010 11:42 PM
To: David Miller
Cc: Xin, Xiaohui; net...@vger.kernel.org; kvm@vger.kernel.org;
linux-ker...@vger.kernel.org; m...@redhat.com; mi...@elte.hu;
herb...@gondor.apana.org.au; jd
Will be on leave during 10/01 ~ 10/07, and slow or no response to the comments.
Thanks
Xiaohui
-Original Message-
From: netdev-ow...@vger.kernel.org [mailto:netdev-ow...@vger.kernel.org] On
Behalf Of
xiaohui@intel.com
Sent: Thursday, September 30, 2010 10:04 PM
To:
-Original Message-
From: Ben Hutchings [mailto:bhutchi...@solarflare.com]
Sent: Tuesday, September 28, 2010 5:24 AM
To: Xin, Xiaohui
Cc: net...@vger.kernel.org; kvm@vger.kernel.org; linux-ker...@vger.kernel.org;
mi...@elte.hu; da...@davemloft.net; herb...@gondor.hengli.com.au;
jd
Thanks, I will move this in order next version.
Thanks
Xiaohui
-Original Message-
From: Ben Hutchings [mailto:bhutchi...@solarflare.com]
Sent: Monday, September 27, 2010 9:57 PM
To: Xin, Xiaohui
Cc: net...@vger.kernel.org; kvm@vger.kernel.org; linux-ker...@vger.kernel.org;
mi...@elte.hu
Ok, I will comment it above the structure.
Thanks
Xiaohui
-Original Message-
From: Ben Hutchings [mailto:bhutchi...@solarflare.com]
Sent: Monday, September 27, 2010 9:43 PM
To: Xin, Xiaohui
Cc: net...@vger.kernel.org; kvm@vger.kernel.org; linux-ker...@vger.kernel.org;
mi...@elte.hu; da
-Original Message-
From: linux-kernel-ow...@vger.kernel.org
[mailto:linux-kernel-ow...@vger.kernel.org] On
Behalf Of Xin, Xiaohui
Sent: Monday, September 27, 2010 8:45 AM
To: Michael S. Tsirkin
Cc: net...@vger.kernel.org; kvm@vger.kernel.org; linux-ker...@vger.kernel.org;
mi...@elte.hu
From: Michael S. Tsirkin [mailto:m...@redhat.com]
Sent: Sunday, September 26, 2010 7:50 PM
To: Xin, Xiaohui
Cc: net...@vger.kernel.org; kvm@vger.kernel.org; linux-ker...@vger.kernel.org;
mi...@elte.hu; da...@davemloft.net; herb...@gondor.hengli.com.au;
jd...@linux.intel.com
Subject: Re: [RFC PATCH
From: Michael S. Tsirkin [mailto:m...@redhat.com]
Sent: Monday, September 27, 2010 1:02 AM
To: Xin, Xiaohui
Cc: net...@vger.kernel.org; kvm@vger.kernel.org; linux-ker...@vger.kernel.org;
mi...@elte.hu; da...@davemloft.net; herb...@gondor.hengli.com.au;
jd...@linux.intel.com
Subject: Re: [PATCH v11
-Original Message-
From: Michael S. Tsirkin [mailto:m...@redhat.com]
Sent: Wednesday, September 22, 2010 7:55 PM
To: Xin, Xiaohui
Cc: net...@vger.kernel.org; kvm@vger.kernel.org; linux-ker...@vger.kernel.org;
mi...@elte.hu; da...@davemloft.net; herb...@gondor.hengli.com.au;
jd
-Original Message-
From: Michael S. Tsirkin [mailto:m...@redhat.com]
Sent: Tuesday, September 21, 2010 9:14 PM
To: Xin, Xiaohui
Cc: net...@vger.kernel.org; kvm@vger.kernel.org; linux-ker...@vger.kernel.org;
mi...@elte.hu; da...@davemloft.net; herb...@gondor.hengli.com.au;
jd
From: Michael S. Tsirkin [mailto:m...@redhat.com]
Sent: Monday, September 20, 2010 7:37 PM
To: Xin, Xiaohui
Cc: net...@vger.kernel.org; kvm@vger.kernel.org; linux-ker...@vger.kernel.org;
mi...@elte.hu; da...@davemloft.net; herb...@gondor.hengli.com.au;
jd...@linux.intel.com
Subject: Re: [RFC PATCH
From: Michael S. Tsirkin [mailto:m...@redhat.com]
Sent: Wednesday, September 15, 2010 5:59 PM
To: Xin, Xiaohui
Cc: Shirley Ma; Arnd Bergmann; Avi Kivity; David Miller;
net...@vger.kernel.org;
kvm@vger.kernel.org; linux-ker...@vger.kernel.org
Subject: Re: [RFC PATCH 2/2] macvtap: TX zero copy
From: Michael S. Tsirkin [mailto:m...@redhat.com]
Sent: Wednesday, September 15, 2010 7:28 PM
To: Xin, Xiaohui
Cc: net...@vger.kernel.org; kvm@vger.kernel.org; linux-ker...@vger.kernel.org;
mi...@elte.hu; da...@davemloft.net; herb...@gondor.hengli.com.au;
jd...@linux.intel.com
Subject: Re: [RFC
From: Shirley Ma [mailto:mashi...@us.ibm.com]
Sent: Tuesday, September 14, 2010 11:05 PM
To: Avi Kivity
Cc: David Miller; a...@arndb.de; m...@redhat.com; Xin, Xiaohui;
net...@vger.kernel.org;
kvm@vger.kernel.org; linux-ker...@vger.kernel.org
Subject: Re: [RFC PATCH 2/2] macvtap: TX zero copy
From: Arnd Bergmann [mailto:a...@arndb.de]
Sent: Tuesday, September 14, 2010 11:21 PM
To: Shirley Ma
Cc: Avi Kivity; David Miller; m...@redhat.com; Xin, Xiaohui;
net...@vger.kernel.org;
kvm@vger.kernel.org; linux-ker...@vger.kernel.org
Subject: Re: [RFC PATCH 2/2] macvtap: TX zero copy between
From: Michael S. Tsirkin [mailto:m...@redhat.com]
Sent: Wednesday, September 15, 2010 12:30 AM
To: Shirley Ma
Cc: Arnd Bergmann; Avi Kivity; Xin, Xiaohui; David Miller;
net...@vger.kernel.org;
kvm@vger.kernel.org; linux-ker...@vger.kernel.org
Subject: Re: [RFC PATCH 2/2] macvtap: TX zero copy
From: Shirley Ma [mailto:mashi...@us.ibm.com]
Sent: Wednesday, September 15, 2010 10:41 AM
To: Xin, Xiaohui
Cc: Avi Kivity; David Miller; a...@arndb.de; m...@redhat.com;
net...@vger.kernel.org;
kvm@vger.kernel.org; linux-ker...@vger.kernel.org
Subject: RE: [RFC PATCH 2/2] macvtap: TX zero copy
Herbert,
Any comments on the modifications of the net core and driver side of this patch?
Thanks
Xiaohui
-Original Message-
From: linux-kernel-ow...@vger.kernel.org
[mailto:linux-kernel-ow...@vger.kernel.org] On
Behalf Of xiaohui@intel.com
Sent: Saturday, September 11, 2010 5:53 PM
From: Michael S. Tsirkin [mailto:m...@redhat.com]
Sent: Sunday, September 12, 2010 9:37 PM
To: Xin, Xiaohui
Cc: net...@vger.kernel.org; kvm@vger.kernel.org; linux-ker...@vger.kernel.org;
mi...@elte.hu; da...@davemloft.net; herb...@gondor.hengli.com.au;
jd...@linux.intel.com
Subject: Re: [RFC PATCH
Playing with rlimit on data path, transparently to the application in this way
looks strange to me, I suspect this has unexpected security implications.
Further, applications may have other uses for locked memory
besides mpassthru - you should not just take it because it's there.
Can we have an
+
+ if (ctor-lock_pages + count lock_limit npages) {
+ printk(KERN_INFO exceed the locked memory rlimit.);
+ return NULL;
+ }
+
+ info = kmem_cache_zalloc(ext_page_info_cache, GFP_KERNEL);
You seem to fill in all memory, why zalloc? this is data path ...
Ok,
Michael,
Sorry to reply the mail late.
So - does this driver help reduce service demand signifiantly?
I'm looking at the performance now.
Some comments from looking at the code:
On Fri, Aug 06, 2010 at 05:23:41PM +0800, xiaohui@intel.com wrote:
+static struct page_info
Herbert,
The v8 patches are modified mostly based on your comments about
napi_gro_frags interface. How do you think about the patches about
net core system part?
We know currently there are some comments about the mp device,
such as to support zero-copy for tun/tap and macvtap. Since there
isn't
-Original Message-
From: Shirley Ma [mailto:mashi...@us.ibm.com]
Sent: Friday, July 30, 2010 6:31 AM
To: Xin, Xiaohui
Cc: net...@vger.kernel.org; kvm@vger.kernel.org; linux-ker...@vger.kernel.org;
m...@redhat.com; mi...@elte.hu; da...@davemloft.net;
herb...@gondor.apana.org.au;
jd
Hello Xiaohui,
On Thu, 2010-07-29 at 19:14 +0800, xiaohui@intel.com wrote:
The idea is simple, just to pin the guest VM user space and then
let host NIC driver has the chance to directly DMA to it.
The patches are based on vhost-net backend driver. We add a device
which provides proto_ops
-Original Message-
From: Herbert Xu [mailto:herb...@gondor.apana.org.au]
Sent: Sunday, June 27, 2010 2:15 PM
To: Dong, Eddie
Cc: Xin, Xiaohui; Stephen Hemminger; net...@vger.kernel.org;
kvm@vger.kernel.org;
linux-ker...@vger.kernel.org; m...@redhat.com; mi...@elte.hu;
da...@davemloft.net
]
Sent: Thursday, June 24, 2010 6:09 PM
To: Dong, Eddie
Cc: Xin, Xiaohui; Stephen Hemminger; net...@vger.kernel.org;
kvm@vger.kernel.org;
linux-ker...@vger.kernel.org; m...@redhat.com; mi...@elte.hu;
da...@davemloft.net;
jd...@linux.intel.com
Subject: Re: [RFC PATCH v7 01/19] Add a new structure
-Original Message-
From: Herbert Xu [mailto:herb...@gondor.apana.org.au]
Sent: Friday, June 18, 2010 1:59 PM
To: Xin, Xiaohui
Cc: Stephen Hemminger; net...@vger.kernel.org; kvm@vger.kernel.org;
linux-ker...@vger.kernel.org; m...@redhat.com; mi...@elte.hu;
da...@davemloft.net;
jd
-Original Message-
From: netdev-ow...@vger.kernel.org [mailto:netdev-ow...@vger.kernel.org] On
Behalf Of
Xin, Xiaohui
Sent: Saturday, June 12, 2010 5:31 PM
To: Herbert Xu
Cc: Stephen Hemminger; net...@vger.kernel.org; kvm@vger.kernel.org;
linux-ker...@vger.kernel.org; m...@redhat.com; mi
-Original Message-
From: Herbert Xu [mailto:herb...@gondor.apana.org.au]
Sent: Friday, June 11, 2010 1:21 PM
To: Xin, Xiaohui
Cc: Stephen Hemminger; net...@vger.kernel.org; kvm@vger.kernel.org;
linux-ker...@vger.kernel.org; m...@redhat.com; mi...@elte.hu;
da...@davemloft.net;
jd
-Original Message-
From: Eric Dumazet [mailto:eric.duma...@gmail.com]
Sent: Saturday, June 05, 2010 10:56 PM
To: Xin, Xiaohui
Cc: net...@vger.kernel.org; kvm@vger.kernel.org; linux-ker...@vger.kernel.org;
m...@redhat.com; mi...@elte.hu; da...@davemloft.net;
herb...@gondor.apana.org.au;
jd
-Original Message-
From: Eric Dumazet [mailto:eric.duma...@gmail.com]
Sent: Saturday, June 05, 2010 10:53 PM
To: Xin, Xiaohui
Cc: net...@vger.kernel.org; kvm@vger.kernel.org; linux-ker...@vger.kernel.org;
m...@redhat.com; mi...@elte.hu; da...@davemloft.net;
herb...@gondor.apana.org.au;
jd
-Original Message-
From: Stephen Hemminger [mailto:shemmin...@vyatta.com]
Sent: Monday, June 07, 2010 7:14 AM
To: Xin, Xiaohui
Cc: net...@vger.kernel.org; kvm@vger.kernel.org; linux-ker...@vger.kernel.org;
m...@redhat.com; mi...@elte.hu; da...@davemloft.net;
herb...@gondor.apana.org.au
-Original Message-
From: kvm-ow...@vger.kernel.org [mailto:kvm-ow...@vger.kernel.org] On Behalf
Of Andi
Kleen
Sent: Monday, June 07, 2010 3:51 PM
To: Stephen Hemminger
Cc: Xin, Xiaohui; net...@vger.kernel.org; kvm@vger.kernel.org;
linux-ker...@vger.kernel.org; m...@redhat.com; mi
-Original Message-
From: Mitchell Erblich [mailto:erbli...@earthlink.net]
Sent: Monday, June 07, 2010 4:17 PM
To: Andi Kleen
Cc: Stephen Hemminger; Xin, Xiaohui; net...@vger.kernel.org;
kvm@vger.kernel.org;
linux-ker...@vger.kernel.org; m...@redhat.com; mi...@elte.hu;
da...@davemloft.net
-Original Message-
From: Herbert Xu [mailto:herb...@gondor.apana.org.au]
Sent: Tuesday, June 08, 2010 1:28 PM
To: Stephen Hemminger
Cc: Xin, Xiaohui; net...@vger.kernel.org; kvm@vger.kernel.org;
linux-ker...@vger.kernel.org; m...@redhat.com; mi...@elte.hu;
da...@davemloft.net;
jd
-Original Message-
From: kvm-ow...@vger.kernel.org [mailto:kvm-ow...@vger.kernel.org] On Behalf Of
Michael S. Tsirkin
Sent: Thursday, May 27, 2010 4:20 PM
To: Xin, Xiaohui
Cc: net...@vger.kernel.org; kvm@vger.kernel.org; linux-ker...@vger.kernel.org;
Herbert
Xu
Subject: Re: issue about
Michael,
I'm now looking into the vhost mergeable buffer, and I tried to use it to
support PS mode with zero-copy. And I found an issue there that I have to
modify the guest virito-net driver.
When guest virtio-net driver submits mergeable buffers, it submits multiple
pages outside. In
Michael,
Sorry, somehow I missed this mail. :-(
Here, we have ever considered 2 ways to utilize the page constructor
API to dispense the user buffers.
One: Modify __alloc_skb() function a bit, it can only allocate a
structure of sk_buff, and the data pointer is pointing to a
The idea is simple, just to pin the guest VM user space and then let
host NIC driver has the chance to directly DMA to it.
Isn't it much easier to map the RX ring of the network device into the
guest's address space, have DMA map calls translate guest addresses to
physical/DMA addresses
+static int dev_is_mpassthru(struct net_device *dev)
bool return value should be better here.
--
Regards，
Changli Gao(xiao...@gmail.com)
Thanks, would fix that.
Thanks
Xiaohui
--
To unsubscribe from this list: send the line unsubscribe kvm in
the body of a message to
Michael,
Sorry, it's based on the suggestion to hook an iocb completion callback
to handle the iocb list in vhost-net.
Thanks
Xiaohui
-Original Message-
From: Xin, Xiaohui
Sent: Thursday, April 22, 2010 4:24 PM
To: m...@redhat.com
Cc: a...@arndb.de; net...@vger.kernel.org; kvm
Michael,
Yes, I think this packet split mode probably maps well to mergeable buffer
support. Note that
1. Not all devices support large packets in this way, others might map
to indirect buffers better
Do the indirect buffers accord to deal with the skb-frag_list?
So we have to figure out
Michael,
The idea is simple, just to pin the guest VM user space and then
let host NIC driver has the chance to directly DMA to it.
The patches are based on vhost-net backend driver. We add a device
which provides proto_ops as sendmsg/recvmsg to vhost-net to
send/recv directly to/from
Michael,
What we have not done yet:
packet split support
What does this mean, exactly?
We can support 1500MTU, but for jumbo frame, since vhost driver before
don't
support mergeable buffer, we cannot try it for multiple sg.
I do not see why, vhost currently supports 64K buffers with
Arnd,
From: Xin Xiaohui xiaohui@intel.com
Add a device to utilize the vhost-net backend driver for
copy-less data transfer between guest FE and host NIC.
It pins the guest user space to the host memory and
provides proto_ops as sendmsg/recvmsg to vhost-net.
Sorry for taking so long
Michael,
The idea is simple, just to pin the guest VM user space and then
let host NIC driver has the chance to directly DMA to it.
The patches are based on vhost-net backend driver. We add a device
which provides proto_ops as sendmsg/recvmsg to vhost-net to
send/recv directly to/from the
Sridhar,
The idea is simple, just to pin the guest VM user space and then
let host NIC driver has the chance to directly DMA to it.
The patches are based on vhost-net backend driver. We add a device
which provides proto_ops as sendmsg/recvmsg to vhost-net to
send/recv directly to/from the
From: Xin Xiaohui xiaohui@intel.com
The patch let host NIC driver to receive user space skb,
then the driver has chance to directly DMA to guest user
space buffers thru single ethX interface.
We want it to be more generic as a zero copy framework.
Signed-off-by: Xin Xiaohui xiaohui
Michael,
For the write logging, do you have a function in hand that we can
recompute the log? If that, I think I can use it to recompute the
log info when the logging is suddenly enabled.
For the outstanding requests, do you mean all the user buffers have
submitted before the logging
Michael,
Qemu needs a userspace write, is that a synchronous one or
asynchronous one?
It's a synchronous non-blocking write.
Sorry, why the Qemu live migration needs the device have a userspace write?
how does the write operation work? And why a read operation is not cared here?
Thanks
Michael,
For the DOS issue, I'm not sure how much the limit get_user_pages()
can pin is reasonable, should we compute the bindwidth to make it?
There's a ulimit for locked memory. Can we use this, decreasing
the value for rlimit array? We can do this when backend is
enabled and re-increment
Michael,
For the write logging, do you have a function in hand that we can
recompute the log? If that, I think I can use it to recompute the
log info when the logging is suddenly enabled.
For the outstanding requests, do you mean all the user buffers have
submitted before the logging ioctl
The vhost-net backend now only supports synchronous send/recv
operations. The patch provides multiple submits and asynchronous
notifications. This is needed for zero-copy case.
Signed-off-by: Xin Xiaohui xiaohui@intel.com
---
Michael,
Now, I made vhost to alloc/destroy the kiocb
Add a device to utilize the vhost-net backend driver for
copy-less data transfer between guest FE and host NIC.
It pins the guest user space to the host memory and
provides proto_ops as sendmsg/recvmsg to vhost-net.
Signed-off-by: Xin Xiaohui xiaohui@intel.com
Signed-off-by: Zhao Yu yzha
For the write logging, do you have a function in hand that we can
recompute the log? If that, I think I can use it to recompute the
log info when the logging is suddenly enabled.
For the outstanding requests, do you mean all the user buffers have
submitted before the logging ioctl changed?
Michael,
I don't use the kiocb comes from the sendmsg/recvmsg,
since I have embeded the kiocb in page_info structure,
and allocate it when page_info allocated.
So what I suggested was that vhost allocates and tracks the iocbs, and
passes them to your device with sendmsg/ recvmsg calls. This
The vhost-net backend now only supports synchronous send/recv
operations. The patch provides multiple submits and asynchronous
notifications. This is needed for zero-copy case.
Signed-off-by: Xin Xiaohui xiaohui@intel.com
---
Michael,
I don't use the kiocb comes from the sendmsg/recvmsg
+/* The structure to notify the virtqueue for async socket */
+struct vhost_notifier {
+struct list_head list;
+struct vhost_virtqueue *vq;
+int head;
+int size;
+int log;
+void *ctrl;
+void (*dtor)(struct vhost_notifier *);
+};
+
So IMO, this is not the
On Sat, Mar 06, 2010 at 05:38:35PM +0800, xiaohui@intel.com wrote:
The idea is simple, just to pin the guest VM user space and then
let host NIC driver has the chance to directly DMA to it.
The patches are based on vhost-net backend driver. We add a device
which provides proto_ops as
...@vger.kernel.org] On Behalf Of
Xin Xiaohui
Sent: Wednesday, February 10, 2010 7:49 PM
To: net...@vger.kernel.org; kvm@vger.kernel.org; linux-ker...@vger.kernel.org;
mi...@elte.hu; m...@redhat.com; jd...@c2.user-mode-linux.org
Subject: [PATCH 0/3] Provide a zero-copy method on KVM virtio-net.
The idea is simple
The patch let host NIC driver to receive user space skb,
then the driver has chance to directly DMA to guest user
space buffers thru single ethX interface.
Signed-off-by: Xin Xiaohui xiaohui@intel.com
Signed-off-by: Zhao Yu yzha...@gmail.com
Sigend-off-by: Jeff Dike jd...@c2.user-mode
Add a device to utilize the vhost-net backend driver for
copy-less data transfer between guest FE and host NIC.
It pins the guest user space to the host memory and
provides proto_ops as sendmsg/recvmsg to vhost-net.
Signed-off-by: Xin Xiaohui xiaohui@intel.com
Signed-off-by: Zhao Yu yzha
The vhost-net backend now only supports synchronous send/recv
operations. The patch provides multiple submits and asynchronous
notifications. This is needed for zero-copy case.
Signed-off-by: Xin Xiaohui xiaohui@intel.com
---
drivers/vhost/net.c | 145
Eric,
Thanks. I will look into that. But don't stop there.
Please comments more. :-)
Thanks
Xiaohui
-Original Message-
From: Eric Dumazet [mailto:eric.duma...@gmail.com]
Sent: Wednesday, February 10, 2010 11:18 PM
To: Xin, Xiaohui
Cc: net...@vger.kernel.org; kvm@vger.kernel.org; linux
On Wednesday 10 February 2010, Xin Xiaohui wrote:
The idea is simple, just to pin the guest VM user space and then
let host NIC driver has the chance to directly DMA to it.
The patches are based on vhost-net backend driver. We add a device
which provides proto_ops as sendmsg/recvmsg to vhost
Hi, Chris
We are interested in joining the conference, since we are now working on the
zero copy patch based on vhost-net.
Thanks
Xiaohui
-Original Message-
From: kvm-ow...@vger.kernel.org [mailto:kvm-ow...@vger.kernel.org] On Behalf Of
Chris Wright
Sent: Tuesday, January 12, 2010
Hi, Michael,
What's your deferring skb allocation patch mentioned here, may you elaborate it
a little more detailed?
Thanks
Xiaohui
-Original Message-
From: kvm-ow...@vger.kernel.org [mailto:kvm-ow...@vger.kernel.org] On Behalf Of
Michael S. Tsirkin
Sent: Tuesday, November 03, 2009
use in this function)
Which qemu tree or patch do you use for kvm_irqfd and kvm_ioeventfd?
Thanks
Xiaohui
-Original Message-
From: Michael S. Tsirkin [mailto:m...@redhat.com]
Sent: Sunday, September 13, 2009 1:46 PM
To: Xin, Xiaohui
Cc: Ira W. Snyder; net...@vger.kernel.org;
virtualizat
Michael,
We are very interested in your patch and want to have a try with it.
I have collected your 3 patches in kernel side and 4 patches in queue side.
The patches are listed here:
PATCHv5-1-3-mm-export-use_mm-unuse_mm-to-modules.patch
PATCHv5-2-3-mm-reduce-atomic-use-on-use_mm-fast-path.patch
the page has
been slower than copying
It may be, we have not thought about this more . Thanks.
Thanks
Xiaohui
-Original Message-
From: Stephen Hemminger [mailto:shemmin...@vyatta.com]
Sent: Wednesday, September 02, 2009 12:05 AM
To: Xin, Xiaohui
Cc: m...@redhat.com; net...@vger.kernel.org
[RFC] Virtual Machine Device Queues (VMDq) support on KVM
Network adapter with VMDq technology presents multiple pairs of tx/rx queues,
and renders network L2 sorting mechanism based on MAC addresses and VLAN tags
for each tx/rx queue pair. Here we present a generic framework, in
: Arnd Bergmann [mailto:a...@arndb.de]
Sent: Monday, August 31, 2009 11:24 PM
To: Xin, Xiaohui
Cc: m...@redhat.com; net...@vger.kernel.org;
virtualizat...@lists.linux-foundation.org; kvm@vger.kernel.org;
linux-ker...@vger.kernel.org; mi...@elte.hu; linux...@kvack.org;
a...@linux-foundation.org; h
-Original Message-
From: Anthony Liguori [mailto:anth...@codemonkey.ws]
Sent: Tuesday, September 01, 2009 5:57 AM
To: Avi Kivity
Cc: Xin, Xiaohui; m...@redhat.com; net...@vger.kernel.org;
virtualizat...@lists.linux-foundation.org; kvm@vger.kernel.org;
linux-ker...@vger.kernel.org; mi...@elte.hu
Hi, Michael
That's a great job. We are now working on support VMDq on KVM, and since the
VMDq hardware presents L2 sorting based on MAC addresses and VLAN tags, our
target is to implement a zero copy solution using VMDq. We stared from the
virtio-net architecture. What we want to proposal is to
, 2009 1:52 AM
To: Xin, Xiaohui
Cc: m...@redhat.com; net...@vger.kernel.org;
virtualizat...@lists.linux-foundation.org; kvm@vger.kernel.org;
linux-ker...@vger.kernel.org; mi...@elte.hu; linux...@kvack.org;
a...@linux-foundation.org; h...@zytor.com; gregory.hask...@gmail.com
Subject: Re: [PATCHv5 3
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