Re: tcp_vtw fail (was: Re: CVS commit: src)

[David Young <dyoung%pobox.com@localhost>]

On Thu, May 26, 2011 at 10:56:34PM +0900, Izumi Tsutsui wrote:
> > > > -int    tcp_vtw_entries = 1 << 16;      /* 64K vestigial TIME_WAIT 
> > > > entries */
> > > > +int    tcp_vtw_entries = 1 << 4;       /* 16 vestigial TIME_WAIT 
> > > > entries */
> > > 
> > > Strikes me as odd if they're really being allocated despite the feature
> > > being disabled.
> > > 
> > > I'm not very familiar with this other than the previous discussions
> > > about it here, but was 64K entries the default because it's
> > > performance-critical?
> > > 
> > > If so, would it be possible to dynamically resize these, controled by a
> > > sysctl stub (or even better, automatically via heuristics in the long
> > > run)?
> > 
> > In the short run, it is best if memory allocation is postponed until
> > after VTW is enabled.  I will look into it.  It may have to wait until
> > Monday.
> 
> Any progress on this issue?
> 
> sun3 and hp300 kernels have troubles with this problem
> and I can't test MD changes requested by a developer...

Sorry I didn't send an update, earlier, it's been a busy week.  I
understand the problem, and I have an idea how I will fix it.  I will
try to work on it tomorrow.

Dave

-- 
David Young             OJC Technologies
dyoung%ojctech.com@localhost      Urbana, IL * (217) 344-0444 x24