On 04/14/2014 09:31 AM, Michael S. Tsirkin wrote:
> On Mon, Apr 14, 2014 at 09:21:47AM -0400, Steven Galgano wrote:
>> Added optional per queue flow control support using IFF_FLOW_CONTROL. When
>> the
>> IFF_FLOW_CONTROL TUNSETIFF flag is specified it will set a per queue
IFF_MULTI_QUEUE, IFF_FLOW_CONTROL will apply to
the single queue. No changes were made to the default drop frame policy.
This change adds support for back pressure use cases.
Reported-by: Brian Adamson
Tested-by: Joseph Giovatto
Signed-off-by: Steven Galgano
---
Version 3 patch reformatted commit
On 04/13/2014 09:40 PM, David Miller wrote:
> From: Steven Galgano
> Date: Sun, 13 Apr 2014 21:30:27 -0400
>
>> Added optional per queue flow control support using IFF_FLOW_CONTROL. When
>> the IFF_FLOW_CONTROL TUNSETIFF flag is specified it will set a per queue
>>
IFF_MULTI_QUEUE, IFF_FLOW_CONTROL will apply to
the single queue. No changes were made to the default drop frame policy.
This change adds support for back pressure use cases.
Reported-by: Brian Adamson
Tested-by: Joseph Giovatto
Signed-off-by: Steven Galgano
---
Previous version of patch did not
pecify
the flow control behavior on a queue by queue basis. This would let the
application decide what should happen once a queue is full: discard or
netif_tx_stop_queue().
I'm not hopeful this solution will be accepted but it might be helpful
to someone else.
>> BTW, in my initial notic
On 04/10/2014 06:29 AM, Michael S. Tsirkin wrote:
> On Wed, Apr 09, 2014 at 10:19:40PM -0400, Steven Galgano wrote:
>> Add tuntap flow control support for use by back pressure routing protocols.
>> Setting the new TUNSETIFF flag IFF_FLOW_CONTROL, will signal resources as
>>
Signed-off-by: Steven Galgano
---
diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index ee328ba..268130c 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -783,8 +783,19 @@ static netdev_tx_t tun_net_xmit(struct sk_buff *skb,
struct net_device *dev)
* number of queues
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