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Date: Mon, 30 Nov 2009 12:20:15 -0800 From: John Fastabend <john.r.fastabend@...el.com> To: Eric Dumazet <eric.dumazet@...il.com> CC: David Miller <davem@...emloft.net>, "Waskiewicz Jr, Peter P" <peter.p.waskiewicz.jr@...el.com>, "robert@...julf.net" <robert@...julf.net>, "hawk@...u.dk" <hawk@...u.dk>, "netdev@...r.kernel.org" <netdev@...r.kernel.org> Subject: Re: ixgbe question Eric Dumazet wrote: > David Miller a écrit : > >> From: John Fastabend <john.r.fastabend@...el.com> >> 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. >> > > Sure, I guess we need a more generic way to handle this. > > Eric, I'll resubmit your patch with a small update to fix my concerns soon. thanks, john. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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