Messages in this thread | | | Date | Fri, 10 Jan 2014 11:40:51 -0500 | From | Vlad Yasevich <> | Subject | Re: [PATCH net 1/2] macvlan: forbid L2 fowarding offload for macvtap |
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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
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