Confused about rtnl routing mutex scalability

nick xerofoify at
Wed Sep 7 23:28:54 EDT 2016

Greetings All,
I am curious as it after reading the network code for a while it seems that to me
at least the rtnl mutex lock is a bottleneck. Is there any reason that we are still
using a global mutex for all routing changes in the networking stack for the Linux
kernel or does it actually scale only, seems to me that it is causing nothing but
problems with deadlocks related to it or issues with locking timeouts on separate
netdev routing tables for two different networks. Is this just me or does this lock
actually cause serious issues or can do so.

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