From: "Michael Büsch" <m@bues.ch>
To: b43-dev@lists.infradead.org
Subject: problems with b43 and greedy traffic
Date: Sun, 12 Jun 2011 01:19:35 +0200 [thread overview]
Message-ID: <20110612011935.486868ff@maggie> (raw)
In-Reply-To: <4167DD4F-0350-4EA1-98A6-CAC427989FED@ing.unibs.it>
On Sun, 12 Jun 2011 00:55:58 +0200
francesco.gringoli at ing.unibs.it wrote:
> Anyway if you put some printk in b43_tx_work you will see that some TCP segments are discarded by it trying to send packets to the dma even if the rings are full. This prevents packets to queue up correctly in the qdisc, so shaping traffic through a b43 interface becomes really difficult.
So this doesn't sound like a b43 problem to me.
The driver disables the software queues, if the hardware queue is full.
If the stack continues to push packets to the driver while queues are stopped,
the only thing the driver can do is discard them.
next prev parent reply other threads:[~2011-06-11 23:19 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-21 18:31 problems with b43 and greedy traffic francesco.gringoli at ing.unibs.it
2011-04-21 18:35 ` Michael Büsch
2011-04-21 21:08 ` Larry Finger
2011-04-22 10:09 ` francesco.gringoli at ing.unibs.it
2011-04-22 19:37 ` francesco.gringoli at ing.unibs.it
2011-04-22 19:58 ` Francesco Gringoli
2011-04-22 21:07 ` Tom Gundersen
2011-04-22 23:37 ` francesco.gringoli at ing.unibs.it
2011-04-26 10:11 ` francesco.gringoli at ing.unibs.it
2011-04-26 14:53 ` Rafał Miłecki
2011-04-26 15:21 ` problems with b43 and greedy (UDP) traffic Larry Finger
2011-04-30 17:03 ` francesco.gringoli at ing.unibs.it
2011-04-30 15:54 ` problems with b43 and greedy traffic francesco.gringoli at ing.unibs.it
2011-04-30 16:01 ` francesco.gringoli at ing.unibs.it
2011-06-11 20:28 ` Rafał Miłecki
2011-06-11 20:34 ` Michael Büsch
2011-06-11 20:48 ` Rafał Miłecki
2011-06-11 21:17 ` Rafał Miłecki
2011-06-11 21:46 ` Michael Büsch
2011-06-11 22:55 ` francesco.gringoli at ing.unibs.it
2011-06-11 23:19 ` Michael Büsch [this message]
2011-06-12 5:28 ` francesco.gringoli at ing.unibs.it
2011-06-12 8:19 ` Michael Büsch
2011-06-12 12:53 ` Rafał Miłecki
2011-06-12 15:33 ` francesco.gringoli at ing.unibs.it
2011-06-12 14:45 ` Rafał Miłecki
2011-06-11 22:48 ` francesco.gringoli at ing.unibs.it
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