Sjur Brændeland writes:
> Zero-Copy data transport on the modem is primary goal for CAIF Virtio.
> In order to achieve Zero-Copy the direction of the Virtio rings are
> flipped in the RX direction. So we have implemented the Virtio
> access-function similar to what is found in vhost.c.
So, this a
On (Tue) 23 Oct 2012 [12:17:49], Rusty Russell wrote:
> sjur.brandel...@stericsson.com writes:
> > From: Sjur Brændeland
> > @@ -1415,7 +1524,16 @@ static void remove_port_data(struct port *port)
> >
> > /* Remove buffers we queued up for the Host to send us data in. */
> > while ((buf
From: Wei Yongjun
Remove duplicated include.
dpatch engine is used to auto generate this patch.
(https://github.com/weiyj/dpatch)
Signed-off-by: Wei Yongjun
---
arch/x86/xen/enlighten.c | 1 -
1 file changed, 1 deletion(-)
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
inde
From: "Michael S. Tsirkin"
Date: Wed, 31 Oct 2012 12:31:06 +0200
> -void vhost_zerocopy_callback(struct ubuf_info *ubuf)
> +void vhost_zerocopy_callback(struct ubuf_info *ubuf, int zerocopy_status)
If you're only reporting true/false values, even just for now,
please use 'bool' for this.
___
On Thu, Nov 01, 2012 at 11:50:24AM -0400, David Miller wrote:
> From: "Michael S. Tsirkin"
> Date: Wed, 31 Oct 2012 12:31:06 +0200
>
> > -void vhost_zerocopy_callback(struct ubuf_info *ubuf)
> > +void vhost_zerocopy_callback(struct ubuf_info *ubuf, int zerocopy_status)
>
> If you're only reporti
From: "Michael S. Tsirkin"
Date: Thu, 1 Nov 2012 18:16:11 +0200
> Do you think it's over-engineering, or a good idea?
Engineer what you need, not what you might need.
___
Virtualization mailing list
Virtualization@lists.linux-foundation.org
https://lis
On 10/31/2012 10:36 PM, Stephen Rothwell wrote:
> Hi all,
>
> New trees: rr-fixes and swiotlb
>
> Changes since 20121031:
>
arch/x86/xen/enlighten.c:109:0: warning: "xen_pvh_domain" redefined
include/xen/xen.h:23:0: note: this is the location of the previous definition
Full randconfig file i
* * *
This series of VMCI linux upstreaming patches include latest udpate from
VMware.
Summary of changes:
- Use RCU for context lookup.
- Remove redundant init()/empty functions.
- Remove unnecessary ASSERTs.
- Remove delayed event callbacks.
- Cleanup so
VMCI Context code maintains state for vmci and allows the driver to communicate
with multiple VMs.
Signed-off-by: George Zhang
---
drivers/misc/vmw_vmci/vmci_context.c | 1247 ++
drivers/misc/vmw_vmci/vmci_context.h | 183 +
2 files changed, 1430 insertions(
VMCI datagram Implements datagrams to allow data to be sent between host
and guest.
Signed-off-by: George Zhang
---
drivers/misc/vmw_vmci/vmci_datagram.c | 506 +
drivers/misc/vmw_vmci/vmci_datagram.h | 52 +++
2 files changed, 558 insertions(+), 0 deletions(-
VMCI doorbell code allows for notifcations between host and guest.
Signed-off-by: George Zhang
---
drivers/misc/vmw_vmci/vmci_doorbell.c | 645 +
drivers/misc/vmw_vmci/vmci_doorbell.h | 53 +++
2 files changed, 698 insertions(+), 0 deletions(-)
create mode 10
VMCI driver code implementes both the host and guest personalities of
the VMCI driver.
Signed-off-by: George Zhang
---
drivers/misc/vmw_vmci/vmci_driver.c | 116 +++
drivers/misc/vmw_vmci/vmci_driver.h | 50 +++
2 files changed, 166 insertions(+),
VMCI event code that manages event handlers and handles callbacks when specific
events fire.
Signed-off-by: George Zhang
---
drivers/misc/vmw_vmci/vmci_event.c | 229
drivers/misc/vmw_vmci/vmci_event.h | 25
2 files changed, 254 insertions(+), 0 dele
VMCI handle code adds support for dynamic arrays that will grow if they need to.
Signed-off-by: George Zhang
---
drivers/misc/vmw_vmci/vmci_handle_array.c | 142 +
drivers/misc/vmw_vmci/vmci_handle_array.h | 52 +++
2 files changed, 194 insertions(+), 0 de
VMCI resource tracks all used resources within the vmci code.
Signed-off-by: George Zhang
---
drivers/misc/vmw_vmci/vmci_resource.c | 232 +
drivers/misc/vmw_vmci/vmci_resource.h | 59
2 files changed, 291 insertions(+), 0 deletions(-)
create mode 10
VMCI routing code is responsible for routing between various hosts/guests as
well as routing in nested scenarios.
Signed-off-by: George Zhang
---
drivers/misc/vmw_vmci/vmci_route.c | 233
drivers/misc/vmw_vmci/vmci_route.h | 30 +
2 files changed, 263
VMCI guest side driver code implementation.
Signed-off-by: George Zhang
---
drivers/misc/vmw_vmci/vmci_guest.c | 762
1 files changed, 762 insertions(+), 0 deletions(-)
create mode 100644 drivers/misc/vmw_vmci/vmci_guest.c
diff --git a/drivers/misc/vmw_vm
VMCI host side driver code implementation.
Signed-off-by: George Zhang
---
drivers/misc/vmw_vmci/vmci_host.c | 1036 +
1 files changed, 1036 insertions(+), 0 deletions(-)
create mode 100644 drivers/misc/vmw_vmci/vmci_host.c
diff --git a/drivers/misc/vmw_vmc
VMCI head config patch Adds all the necessary files to enable building of the
VMCI module with the Linux Makefiles and Kconfig systems. Also adds the header
files used for building modules against the driver.
Signed-off-by: George Zhang
---
drivers/misc/Kconfig|1
drive
tun supports zero copy transmit since 0690899b4d4501b3505be069b9a687e68ccbe15b,
however you can only enable this mode if you know your workload does not
trigger heavy guest to host/host to guest traffic - otherwise you
get a (minor) performance regression.
This patchset addresses this problem by n
Even if skb is marked for zero copy, net core might still decide
to copy it later which is somewhat slower than a copy in user context:
besides copying the data we need to pin/unpin the pages.
Add a parameter reporting such cases through zero copy callback:
if this happens a lot, device can take t
Orphaning frags for zero copy skbs needs to allocate data in atomic
context so is has a chance to fail. If it does we currently discard
the skb which is safe, but we don't report anything to the caller,
so it can not recover by e.g. disabling zero copy.
Add an API to free skb reporting such errors
When tun transmits a zero copy skb, it orphans the frags
which might need to allocate extra memory, in atomic context.
If that fails, notify ubufs callback before freeing the skb
as a hint that device should disable zerocopy mode.
Signed-off-by: Michael S. Tsirkin
---
drivers/net/tun.c | 1 +
1
Zerocopy handling code is vhost-net specific.
Move it from vhost.c/vhost.h out to net.c
Signed-off-by: Michael S. Tsirkin
---
drivers/vhost/net.c | 45
drivers/vhost/tcm_vhost.c | 1 +
drivers/vhost/vhost.c | 53 +++-
Even when vhost-net is in zero-copy transmit mode,
net core might still decide to copy the skb later
which is somewhat slower than a copy in user
context: data copy overhead is added to the cost of
page pin/unpin. The result is that enabling tx zero copy
option leads to higher CPU utilization for g
It seems that to avoid deadlocks it is enough to poll vq before
we are going to use the last buffer. This is faster than
c70aa540c7a9f67add11ad3161096fb95233aa2e.
Signed-off-by: Michael S. Tsirkin
---
drivers/vhost/net.c | 14 --
1 file changed, 12 insertions(+), 2 deletions(-)
di
Better document macros for DMA tracking. Add an
explicit one for DMA in progress instead of
relying on user supplying len != 1.
Signed-off-by: Michael S. Tsirkin
---
drivers/vhost/net.c | 3 ++-
drivers/vhost/vhost.c | 2 +-
drivers/vhost/vhost.h | 12 +---
3 files changed, 12 insert
This will be used to disable zerocopy when error rate
is high.
Signed-off-by: Michael S. Tsirkin
---
drivers/vhost/vhost.c | 7 ---
drivers/vhost/vhost.h | 4
2 files changed, 8 insertions(+), 3 deletions(-)
diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c
index f23cf89..5aff
On Thu, Nov 01, 2012 at 10:18:47AM -0700, Randy Dunlap wrote:
> On 10/31/2012 10:36 PM, Stephen Rothwell wrote:
>
> > Hi all,
> >
> > New trees: rr-fixes and swiotlb
> >
> > Changes since 20121031:
> >
>
>
> arch/x86/xen/enlighten.c:109:0: warning: "xen_pvh_domain" redefined
> include/xen/xen
Amit Shah writes:
> On (Tue) 23 Oct 2012 [12:17:49], Rusty Russell wrote:
>> sjur.brandel...@stericsson.com writes:
>> > From: Sjur Brændeland
>
>> > @@ -1415,7 +1524,16 @@ static void remove_port_data(struct port *port)
>> >
>> >/* Remove buffers we queued up for the Host to send us data i
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