lkml.org 
[lkml]   [2014]   [Jan]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH net 1/2] macvlan: forbid L2 fowarding offload for macvtap
On 01/10/2014 02:06 AM, Jason Wang wrote:
> On 01/10/2014 05:39 AM, Stephen Hemminger wrote:
>> On Thu, 09 Jan 2014 16:55:07 +0800
>> Jason Wang <jasowang@redhat.com> wrote:
>>
>>> What if use do want a qdisc and want to change the its queue length for
>>> tun/macvlan? And the the name tx_queue_length is misleading. For tun it
>>> may make sense since it was used in transmission path. For macvtap it
>>> was not. So maybe what we need is just a new ioctl for both tun/macvtap
>>> and a new feature flag. If user create the device with new feature flag,
>>> the socket receive queue length could be changed by ioctl instead of
>>> dev->tx_queue_length. If not, the old behaviour could be kept.
>> The overloading of tx_queue_len in macvtap was the original design mistake.
>> Can't this just be undone and expose rx_queue_len as sysfs attribute?
>
> That works. But we current allow user to change the socket sndbuf
> through TUNSNDBUF. Maybe we need a similar one for receive.
>

That would make sense. Since the user interacts with tun fd almost as a
socket and there is actually a socket hiding in the kernel, it almost
begs for actual SO_SNDBUF/SO_RCVBUF support :)

-vlad


\
 
 \ /
  Last update: 2014-01-10 18:21    [W:0.069 / U:1.088 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site