Re: HEADSUP: Sleep queues added to kernel, so be careful.

On Sat, 28 Feb 2004, Robert Watson wrote:

>
> On Sat, 28 Feb 2004, Vincent Poy wrote:
>
> > > > >   Switch the sleep/wakeup and condition variable implementations to use the
> > > > >   sleep queue interface:
> > > >
> > > > There should be little user-visible effect from this change.
> > >
> > > Except for the kernel breakage, perhaps ;-) I guess John is away until
> > > Monday though.
> >
> > 	What kind of kernel breakage?
>
> I think Kris is referring to the tinderbox messages -- the midway driver
> appears to be having problems compiling because it relied on the
> cv_waitq_empty() primitive, which is no longer present following the sleep
> queue change.

	Thanks for explaining that!

> > What seems to happen for me is that I was originally on a September 23,
> > 2003 -CURRENT and then applied all /etc updates and then according to
> > src/UPDATING - I did a make buildworld, followed by a make buildkernel,
> > make installkernel and rebooted and things were still working.  Then I
> > did a make installworld and then recvsupped with the latest tree which
> > had src/sbin/savecore/savecore.c 1.68 as the latest thing, then repeated
> > the make buildworld, make buildkernel, make installkernel, make
> > installworld but this time as soon as I rebooted, the network seems to
> > not work at all.  I can't get past the machine.  Is this something
> > broken with ipfw since I can't ping the public IP but I can ping the
> > local 192.168.0.1 address but not anything beyond that and is connected
> > at 100Mbps Full Duplex.  Tried switching both NIC cards and cables just
> > in case they decided to fail but no go either.
>
> Could you confirm that your userspace and userland are really 100% in
> sync?  If you run without IPFW, do things work properly?

	Yep, they are in sync.  I guess I stayed up all night trying to
figure it out and right before your message, that's what I decided to do
by changing my /etc/rc.conf for firewall_enable="NO" from "YES" even
though I left the firewall_type="open".  My /etc/rc.firewall script does
use pipe and queues from dummynet so I don't know if that has an effect or
not.  But anyways, with the firewall disabled, this time ping and
traceroute doesn't seem to get anywhere and "ipfw show" shows:
65535   299    19878 deny ip from any to any
so I did a "ipfw add 65000 allow all from any to any" and then the box can
reach the outside fine so it seems like either the ipfw or dummynet is
broken.


Cheers,
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