softirqs are invoked while bottom halves are masked
eric.dumazet at gmail.com
Wed Jul 13 17:38:53 EST 2011
Le mercredi 13 juillet 2011 à 09:20 +0200, Thomas De Schampheleire a
> I just want to mention that, although you seem to think that we
> shouldn't have created this thread in the first place, your and Eric's
> remarks have actually helped us in identifying the problem and
> increasing our understanding.
Thread was fine IMHO, but should have mentioned the context of "non
standard linux-2.6 or net-next-2.6 trees"
I would like to mention NETIF_F_LLTX existence.
While being marked deprecated, it allows a lockless tx path :
The device transmit handler can then perform custom actions, including
its own locking if needed.
If the user wants a specific Qdisc setup (instead of a no qdisc one), it
veth, loopback, dummy, macvlan & bond devices use NETIF_F_LLTX for
But ndo_start_xmit() must always be called with BH disabled.
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