Re: Making IFQ_MAXLEN tunable

On Fri, 30 Apr 2010 13:23:13 -0700
Maxim Sobolev <sobomax_at_sippysoft.com> wrote:

> 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
> 

Seems like a good idea, although I don't see where ifqmaxlen is being
initialized.

--
Gary Jennejohn