Hello,
On Mon, 28 Sep 2015, Anand Gurram wrote:
> I am currently using kernel version 3.16.7 on a linux switch.
> While creating and destroying network namespaces I am observing below logs
> on the console
> "unregister_netdevice: waiting for lo to become free. Usage count = 1"
>
> Can you please suggest and provide instructions on how to debug this issue.
> If any fix already available can you please point me to the link.
There are two commits from Linux 4.2 that may help:
commit e9e4dd3267d0 ("net: do not process device backlog during unregistration")
commit 2c17d27c36dc ("net: call rcu_read_lock early in process_backlog")
For now I see them only in 3.2.71+ and 3.12.48+.
I think, they will appear in other stable versions too...
Regards
--
Julian Anastasov <j...@ssi.bg>
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