HEADS UP: inpcb/inpcbinfo rwlocking: coming to a 7-STABLE branch near you

[Mike Tancsa]

At 12:55 PM 8/18/2008, Kip Macy wrote:
>got it

Thanks.  The problem manifests itself soon after boot. There is 
nothing special about the box, it has 2 em network interfaces doing a 
lot of sendmail as well as local recursive DNS for itself and a few 
other sendmail boxes and also talks to a cluster of spam / virus 
scanning machines over tcp and UDP.

         ---Mike

>On Mon, Aug 18, 2008 at 9:22 AM, Mike Tancsa <mike at sentex.net> wrote:
> > At 10:24 AM 8/18/2008, John Baldwin wrote:
> >
> >> >   Edit src/sys/conf/files
> >> >    Add delta 1.1243.2.32 2008.07.30.20.35.41 kmacy
> >> >   Edit src/sys/netinet/tcp_subr.c
> >> >    Add delta 1.300.2.4 2008.07.30.20.35.41 kmacy
> >> >   Edit src/sys/netinet/tcp_syncache.c
> >> >    Add delta 1.130.2.9 2008.07.30.20.35.41 kmacy
> >> >    Add delta 1.130.2.10 2008.07.30.20.51.20 kmacy
> >> >   Edit src/sys/netinet/tcp_syncache.h
> >> >    Add delta 1.1.2.1 2008.07.30.20.35.41 kmacy
> >> >   Edit src/sys/netinet/tcp_usrreq.c
> >> >    Add delta 1.163.2.4 2008.07.30.20.35.41 kmacy
> >>
> >> These are changes by Kip to do TCP offload (181013, 181014).
> >>
> >> Given that, I think the likeliest changes to cause this are the TCP
> >> offload
> >> changes.  Note that Kip later MFC'd this change which changed ARP stuff:
> >>
> >> However, I would stary by narrowing it down to see if Kip's commits cause
> >> the
> >> change.
> >
> >
> > As I dont have the skills to unwind Robert's patch, I have done the
> > following
> >
> > csup with date=2008.08.01.00.00.00
> >
> > which shows the problem.  I then manually grabbed the prior versions of the
> > above files
> >
> > 0[smtp2]% ident src/sys/conf/files
> > src/sys/conf/files:
> >     $FreeBSD: src/sys/conf/files,v 1.1243.2.30 2008/07/25 
> 17:46:01 jhb Exp $
> > 0[smtp2]% ident src/sys/netinet/tcp_subr.c
> > src/sys/netinet/tcp_subr.c:
> >     $FreeBSD: src/sys/netinet/tcp_subr.c,v 1.300.2.3 2008/07/24 01:13:22
> > julian Exp $
> > 0[smtp2]% ident src/sys/netinet/tcp_syncache.c
> > src/sys/netinet/tcp_syncache.c:
> >     $FreeBSD: src/sys/netinet/tcp_syncache.c,v 1.130.2.8 
> 2008/07/24 01:13:22
> > julian Exp $
> > 0[smtp2]% ident src/sys/netinet/tcp_syncache.h
> > src/sys/netinet/tcp_syncache.h:
> >     $FreeBSD: src/sys/netinet/tcp_syncache.h,v 1.1 2007/07/27 
> 00:57:06 silby
> > Exp $
> > 0[smtp2]% ident src/sys/netinet/tcp_usrreq.c
> > src/sys/netinet/tcp_usrreq.c:
> >     $FreeBSD: src/sys/netinet/tcp_usrreq.c,v 1.163.2.3 2008/03/01 11:50:00
> > rwatson Exp $
> > 0[smtp2]%
> >
> > All is OK.  So it looks like the above introduced the bug.
> >
> >        ---Mike
> >