netdev - tx_queue_len question

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Message-ID: <b0438a630903301049s7aa796b5t1658999bd4ee1f69@mail.gmail.com>
Date:	Mon, 30 Mar 2009 19:49:10 +0200
From:	Miguel Ángel Álvarez <gotzoncabanes@...il.com>
To:	netdev@...r.kernel.org, Krzysztof Halasa <khc@...waw.pl>
Subject: tx_queue_len question

Hi

Could anyone please tell me how tx_queue_len works? (Or where to take
a look to?).

I am facing two problems with it:
- Using ixp4xx_hss driver, I am not in the same situation if I let the
driver chose tx_queue_len in the initialization, or if I use ifconfig
with the same value (100). With the last it seems to be capable of
storing more frames.
- When I increment it to 300 using ifconfig, the behaviour seems to be
worse than in the case of 100 or 200. Which are the litis of the
value?

Thanks

Miguel Ángel Álvarez
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