On 11/03/14 19:41, Zoltan Kiss wrote:
On 07/03/14 17:59, Thomas Graf wrote:
On 03/07/2014 06:28 PM, Pravin Shelar wrote:
Problem is mapping SKBTX_DEV_ZEROCOPY pages to userspace. skb_zerocopy
is not doing that.
Unless I missing something, Current netlink code can not handle
skb-frags with zero
On 07/03/14 17:59, Thomas Graf wrote:
On 03/07/2014 06:28 PM, Pravin Shelar wrote:
Problem is mapping SKBTX_DEV_ZEROCOPY pages to userspace. skb_zerocopy
is not doing that.
Unless I missing something, Current netlink code can not handle
skb-frags with zero copy. So we have to copy skb anyways a
On Fri, Mar 7, 2014 at 10:05 AM, Thomas Graf wrote:
> On 03/07/2014 06:19 PM, Pravin Shelar wrote:
>>
>> On Fri, Mar 7, 2014 at 7:58 AM, Thomas Graf wrote:
>>>
>>> On 03/07/2014 05:46 AM, Pravin Shelar wrote:
But I found bug in datapath user-space queue code. I am not sure how
On Fri, Mar 7, 2014 at 9:59 AM, Thomas Graf wrote:
> On 03/07/2014 06:28 PM, Pravin Shelar wrote:
>>
>> Problem is mapping SKBTX_DEV_ZEROCOPY pages to userspace. skb_zerocopy
>> is not doing that.
>>
>> Unless I missing something, Current netlink code can not handle
>> skb-frags with zero copy. So
On 03/07/2014 06:19 PM, Pravin Shelar wrote:
On Fri, Mar 7, 2014 at 7:58 AM, Thomas Graf wrote:
On 03/07/2014 05:46 AM, Pravin Shelar wrote:
But I found bug in datapath user-space queue code. I am not sure how
this can work with skb fragments and MMAP-netlink socket.
Here is what happens, OVS
On 03/07/2014 06:28 PM, Pravin Shelar wrote:
Problem is mapping SKBTX_DEV_ZEROCOPY pages to userspace. skb_zerocopy
is not doing that.
Unless I missing something, Current netlink code can not handle
skb-frags with zero copy. So we have to copy skb anyways and no need
to orphan-frags here.
If you
On Fri, Mar 7, 2014 at 4:29 AM, Zoltan Kiss wrote:
> On 07/03/14 04:46, Pravin Shelar wrote:
>>
>> On Thu, Mar 6, 2014 at 9:09 AM, Zoltan Kiss
>> wrote:
>>>
>>> Do you have any feedback on this? I'm also adding KVM list as they might
>>> be
>>> interested in this.
>>>
>>> Zoli
>>>
>>>
>>> On 28/0
On Fri, Mar 7, 2014 at 8:23 AM, Thomas Graf wrote:
> On 02/28/2014 08:16 PM, Zoltan Kiss wrote:
>>
>> The kernel datapath now switched to zerocopy Netlink messages, but that
>> also
>> means that the pages on frags array are sent straight to userspace. If
>> those
>> pages came outside the kernel,
On Fri, Mar 7, 2014 at 7:58 AM, Thomas Graf wrote:
> On 03/07/2014 05:46 AM, Pravin Shelar wrote:
>>
>> But I found bug in datapath user-space queue code. I am not sure how
>> this can work with skb fragments and MMAP-netlink socket.
>> Here is what happens, OVS allocates netlink skb and adds frag
On 02/28/2014 08:16 PM, Zoltan Kiss wrote:
The kernel datapath now switched to zerocopy Netlink messages, but that also
means that the pages on frags array are sent straight to userspace. If those
pages came outside the kernel, we have to swap them out with local copies.
Signed-off-by: Zoltan Ki
On 03/07/2014 05:46 AM, Pravin Shelar wrote:
But I found bug in datapath user-space queue code. I am not sure how
this can work with skb fragments and MMAP-netlink socket.
Here is what happens, OVS allocates netlink skb and adds fragments to
skb using skb_zero_copy(), then calls genlmsg_unicast()
On 07/03/14 04:46, Pravin Shelar wrote:
On Thu, Mar 6, 2014 at 9:09 AM, Zoltan Kiss wrote:
Do you have any feedback on this? I'm also adding KVM list as they might be
interested in this.
Zoli
On 28/02/14 19:16, Zoltan Kiss wrote:
The kernel datapath now switched to zerocopy Netlink message
On Thu, Mar 6, 2014 at 9:09 AM, Zoltan Kiss wrote:
> Do you have any feedback on this? I'm also adding KVM list as they might be
> interested in this.
>
> Zoli
>
>
> On 28/02/14 19:16, Zoltan Kiss wrote:
>>
>> The kernel datapath now switched to zerocopy Netlink messages, but that
>> also
>> means
Do you have any feedback on this? I'm also adding KVM list as they might
be interested in this.
Zoli
On 28/02/14 19:16, Zoltan Kiss wrote:
The kernel datapath now switched to zerocopy Netlink messages, but that also
means that the pages on frags array are sent straight to userspace. If those
p
The kernel datapath now switched to zerocopy Netlink messages, but that also
means that the pages on frags array are sent straight to userspace. If those
pages came outside the kernel, we have to swap them out with local copies.
Signed-off-by: Zoltan Kiss
---
net/openvswitch/datapath.c |6 ++
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