[ofa-general] RE: [PATCH 1/4] [NET_SCHED] explict hold dev tx lock

[Waskiewicz Jr, Peter P]

> I have submitted this before; but here it is again.
> Against net-2.6.24 from yesterday for this and all following patches. 
> 
> 
> cheers,
> jamal

Hi Jamal,
	I've been (slowly) working on resurrecting the original design
of my multiqueue patches to address this exact issue of the queue_lock
being a hot item.  I added a queue_lock to each queue in the subqueue
struct, and in the enqueue and dequeue, just lock that queue instead of
the global device queue_lock.  The only two issues to overcome are the
QDISC_RUNNING state flag, since that also serializes entry into the
qdisc_restart() function, and the qdisc statistics maintenance, which
needs to be serialized.  Do you think this work along with your patch
will benefit from one another?  I apologize for not having working
patches right now, but I am working on them slowly as I have some blips
of spare time.

Thanks,
-PJ Waskiewicz