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Date: Sun, 29 Nov 2009 16:51:09 -0700
To: pyunyh@gmail.com
From: Brett Glass <brett@lariat.net>
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Cc: freebsd-usb@freebsd.org
Subject: Re: usb/140883: [axe] USB gigabit ethernet hangs after short
 period of traffic
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At 02:38 PM 11/29/2009, Pyun YongHyeon wrote:

>I'm not sure buffer size allowed in driver is 4K. Long time ago I
>increased Rx buffer size to 16KB from 2KB for 88178/88772. That
>change was essential to get 220Mbps for 88178/88772 on Rx. The
>patch was not made into 8.0-RELEASE though.

If not, it certainly ought to get into 8.1-RELEASE and 7.3-RELEASE...
so long as it doesn't cause the USB stack to freeze up. 16 KB is a
much more reasonable buffer size.

By the way, I've done some stress testing with the patch I posted, and
it seems very solid. It appears that the AX88772A chip can safely be
treated like an AX88772.

--Brett Glass