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Date:	Sun, 29 Nov 2009 00:18:56 -0800 (PST)
From:	David Miller <>
Subject: Re: ixgbe question

From: John Fastabend <>
Date: Tue, 24 Nov 2009 13:14:12 +0000

> Believe the below patch will break DCB and FCoE though, both features
> have the potential to set real_num_tx_queues to greater then the
> number of CPUs.  This could result in real_num_tx_queues >
> num_tx_queues.
> The current solution isn't that great though, maybe we should set to
> the minimum of MAX_TX_QUEUES and num_possible_cpus() * 2 + 8.
> That should cover the maximum possible queues for DCB, FCoE and their
> combinations.
> general multiq = num_possible_cpus()
> DCB = 8 tx queue's
> FCoE = 2*num_possible_cpus()
> FCoE + DCB = 8 tx queues + num_possible_cpus

Eric, I'm tossing your patch because of this problem, just FYI.
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