Hi,
Many network drivers in the FreeBSD kernel use the IFQ_MAXLEN value to
set length of the outgoing packets queue. The default value for that
parameter is only 50, which is pretty low especially for the cases when
the system handles lot of small packets and can cause ENOBUFS in
applications under the load. The following patch makes IFQ_MAXLEN a
tunable. I am also tempted to bump the default value for IFQ_MAXLEN
10-fold, but would like to hear what do people think about it first.
http://sobomax.sippysoft.com/IFQ_MAXLEN.diff
-Maxim
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