Date: Tue, 24 Feb 2004 18:22:27 +0100 From: Andre Oppermann <oppermann@pipeline.ch> To: Steve Kargl <sgk@troutmask.apl.washington.edu> Cc: cvs-src@freebsd.org Subject: Re: cvs commit: src/sys/netinet tcp_input.c tcp_subr.c tcp_var.h Message-ID: <403B8853.45CBEE28@pipeline.ch> References: <200402241527.i1OFRgdm072232@repoman.freebsd.org> <403B6FBB.F1BD933C@freebsd.org> <403B7157.8030502@freebsd.org> <20040224171706.GA59202@troutmask.apl.washington.edu>
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Steve Kargl wrote:
>
> On Tue, Feb 24, 2004 at 08:44:23AM -0700, Scott Long wrote:
> > Andre Oppermann wrote:
> > >Andre Oppermann wrote:
> > >
> > >>andre 2004/02/24 07:27:42 PST
> > >>
> > >> FreeBSD src repository
> > >>
> > >> Modified files:
> > >> sys/netinet tcp_input.c tcp_subr.c tcp_var.h
> > >> Log:
> > >> Convert the tcp segment reassembly queue to UMA and limit the maximum
> > >> amount of segments it will hold.
> > >>
> > >> The following tuneables and sysctls control the behaviour of the tcp
> > >> segment reassembly queue:
> > >>
> > >> net.inet.tcp.reass.maxsegments (loader tuneable)
> > >> specifies the maximum number of segments all tcp reassemly queues can
> > >> hold (defaults to 1/16 of nmbclusters).
> > >>
> > >> net.inet.tcp.reass.maxqlen
> > >> specifies the maximum number of segments any individual tcp session
> > >> queue
> > >> can hold (defaults to 48).
> > >>
> > >> net.inet.tcp.reass.cursegments (readonly)
> > >> counts the number of segments currently in all reassembly queues.
> > >>
> > >> net.inet.tcp.reass.overflows (readonly)
> > >> counts how often either the global or local queue limit has been
> > >> reached.
> > >>
> > >> Tested by: bms, silby
> > >> Reviewed by: bms, silby
> > >
> > >
> > >This changes sizeof(struct tcpcb) and makes a recompile of libkvm and
> > >related userland network utilities neccessary.
> > >
> >
> > Please make this statement a little louder via a HEADS UP message, and
> > add an entry to src/UPDATING.
> >
>
> Does this require a _FreeBSD_version bump? In other words, will
> it affect ports/{net,www,sysutils}?
No, it doesn't. Only things like netstat are affected because they use
the libkvm to access in-kernel structures.
--
Andre
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