[ovs-discuss] OVS kernel module - BUG as the data rate increases

Jesse Gross jesse at nicira.com
Wed Sep 4 18:39:03 UTC 2013


On Wed, Sep 4, 2013 at 11:28 AM, Sujayyendhiren RS <sujayy1983 at gmail.com> wrote:
> Hi Jesse
>
> I must have added some more description with that post.
> Description:
> (i) It is reproducible.
> (ii) OpenVSwitch version is 1.9.0
> (iii) The dmesg is observed because of the following code that i have added,
> which sends a copy of data packet to userspace via Tunnel Interface "TunX".
>
>                     skb_out =  skb_clone ( skb, GFP_KERNEL);

You can't use GFP_KERNEL in interrupt context because it can sleep.
You must use GFP_ATOMIC.

When reporting problems in the future, please make it clear that you
have modified the code.



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