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Old 07-31-2008, 04:44 PM
"Richard W.M. Jones"
 
Default Anyone seeing serious network breakage in current Rawhide?

Just rebooted into a fully up to date Rawhide, and I'm experiencing
really odd network-related problems.

For example, ssh & scp work fine.

HTTP is totally broken: most web pages time out (either in DNS or
during page load), but occasionally I can get a whole webpage. Tested
this in all of Firefox, Seamonkey and w3m, so I'm fairly sure it's not
just a broken Firefox. I seem to have excluded local factors, such as
the router and network connection itself, since other machines in my
office work fine.

ping is OK with small and large packet sizes.

DNS lookups work fine from command line tools (eg. ping, ssh), but
fail quite a lot in browsers.

Linux thinkpad 2.6.27-0.186.rc0.git15.fc10.i686 #1 SMP Sun Jul 27 05:22:35 EDT 2008 i686 i686 i386 GNU/Linux

The network is wireless, using iwl3945 driver, configured by
NetworkManager. As far as I'm aware the kernel is untainted and there
is no non-free software installed on the machine.

Nothing very interesting in dmesg except some oopses in
sched_mc_power_savings_store which appear to be unrelated.

To be honest, I'm not even sure what to look at next ...

Rich.

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Old 07-31-2008, 04:58 PM
Bill Nottingham
 
Default Anyone seeing serious network breakage in current Rawhide?

Richard W.M. Jones (rjones@redhat.com) said:
> Just rebooted into a fully up to date Rawhide, and I'm experiencing
> really odd network-related problems.

I noticed this, backed down to an earlier kernel, and everything was
fine.

Bill

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Old 07-31-2008, 06:32 PM
"Tom London"
 
Default Anyone seeing serious network breakage in current Rawhide?

On Thu, Jul 31, 2008 at 9:58 AM, Bill Nottingham <notting@redhat.com> wrote:
> Richard W.M. Jones (rjones@redhat.com) said:
>> Just rebooted into a fully up to date Rawhide, and I'm experiencing
>> really odd network-related problems.
>
> I noticed this, backed down to an earlier kernel, and everything was
> fine.
>
> Bill
>
I had a similar issue: "curl http://hostname" failing on my Rawhide
system with DNS complaints, but "nslookup hostname" would work.
Typically, "curl" would time out after 5 seconds, while "nslookup"
would succed in less than a tenth of a second. [Alternatively, try
"time getent ahosts hostname".]

Long BZ report here: https://bugzilla.redhat.com/show_bug.cgi?id=454206

My issue appears to be my ISP's DNS servers not properly handling
IPv6 type requests. [Actually, some would work, some wouldn't.]

This sound like your issue?

tom

[Thanks to Ulrich Drepper for all his help on this....]
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Old 07-31-2008, 07:57 PM
Dan Williams
 
Default Anyone seeing serious network breakage in current Rawhide?

On Thu, 2008-07-31 at 17:44 +0100, Richard W.M. Jones wrote:
> Just rebooted into a fully up to date Rawhide, and I'm experiencing
> really odd network-related problems.
>
> For example, ssh & scp work fine.
>
> HTTP is totally broken: most web pages time out (either in DNS or
> during page load), but occasionally I can get a whole webpage. Tested
> this in all of Firefox, Seamonkey and w3m, so I'm fairly sure it's not
> just a broken Firefox. I seem to have excluded local factors, such as
> the router and network connection itself, since other machines in my
> office work fine.
>
> ping is OK with small and large packet sizes.
>
> DNS lookups work fine from command line tools (eg. ping, ssh), but
> fail quite a lot in browsers.
>
> Linux thinkpad 2.6.27-0.186.rc0.git15.fc10.i686 #1 SMP Sun Jul 27 05:22:35 EDT 2008 i686 i686 i386 GNU/Linux
>
> The network is wireless, using iwl3945 driver, configured by
> NetworkManager. As far as I'm aware the kernel is untainted and there
> is no non-free software installed on the machine.
>
> Nothing very interesting in dmesg except some oopses in
> sched_mc_power_savings_store which appear to be unrelated.

There's breakage upstream in wireless-land for all mac80211-based
drivers (b43, b43-legacy, iwl3945, iwl4965, ath5k, rt2x00, etc) while
fallout from Dave Miller's multiqueue patches is fixed up. mac80211 was
incorrectly using the skb->cb field that the multiqueue patches are now
also using, and that conflict is causing a lot of random weirdness.

Dan


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Old 08-01-2008, 06:45 AM
Ralf Ertzinger
 
Default Anyone seeing serious network breakage in current Rawhide?

Hi.

On Thu, 31 Jul 2008 15:57:36 -0400, Dan Williams wrote:

> There's breakage upstream in wireless-land for all mac80211-based
> drivers (b43, b43-legacy, iwl3945, iwl4965, ath5k, rt2x00, etc) while
> fallout from Dave Miller's multiqueue patches is fixed up. mac80211
> was incorrectly using the skb->cb field that the multiqueue patches
> are now also using, and that conflict is causing a lot of random
> weirdness.

Like not being able to associate with an AP?

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Old 08-01-2008, 11:01 AM
Dan Williams
 
Default Anyone seeing serious network breakage in current Rawhide?

On Fri, 2008-08-01 at 08:45 +0200, Ralf Ertzinger wrote:
> Hi.
>
> On Thu, 31 Jul 2008 15:57:36 -0400, Dan Williams wrote:
>
> > There's breakage upstream in wireless-land for all mac80211-based
> > drivers (b43, b43-legacy, iwl3945, iwl4965, ath5k, rt2x00, etc) while
> > fallout from Dave Miller's multiqueue patches is fixed up. mac80211
> > was incorrectly using the skb->cb field that the multiqueue patches
> > are now also using, and that conflict is causing a lot of random
> > weirdness.
>
> Like not being able to associate with an AP?

Definitely. That doesn't mean your problem is caused by this upstream
breakage, but that's got to get fixed before we could debug the issue at
all.

Dan


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Old 08-01-2008, 01:38 PM
Michael Solberg
 
Default Anyone seeing serious network breakage in current Rawhide?

On Fri, 2008-08-01 at 07:01 -0400, Dan Williams wrote:
> On Fri, 2008-08-01 at 08:45 +0200, Ralf Ertzinger wrote:
> > Hi.
> >
> > On Thu, 31 Jul 2008 15:57:36 -0400, Dan Williams wrote:
> >
> > > There's breakage upstream in wireless-land for all mac80211-based
> > > drivers (b43, b43-legacy, iwl3945, iwl4965, ath5k, rt2x00, etc) while
> > > fallout from Dave Miller's multiqueue patches is fixed up. mac80211
> > > was incorrectly using the skb->cb field that the multiqueue patches
> > > are now also using, and that conflict is causing a lot of random
> > > weirdness.
> >
> > Like not being able to associate with an AP?
>
> Definitely. That doesn't mean your problem is caused by this upstream
> breakage, but that's got to get fixed before we could debug the issue at
> all.

FWIW I'm also seeing these issues with iwl3945 in
kernel-2.6.25.10-47.fc8. Is there an open BZ on this?

Michael.


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Old 08-01-2008, 02:03 PM
Dan Williams
 
Default Anyone seeing serious network breakage in current Rawhide?

On Fri, 2008-08-01 at 09:38 -0400, Michael Solberg wrote:
> On Fri, 2008-08-01 at 07:01 -0400, Dan Williams wrote:
> > On Fri, 2008-08-01 at 08:45 +0200, Ralf Ertzinger wrote:
> > > Hi.
> > >
> > > On Thu, 31 Jul 2008 15:57:36 -0400, Dan Williams wrote:
> > >
> > > > There's breakage upstream in wireless-land for all mac80211-based
> > > > drivers (b43, b43-legacy, iwl3945, iwl4965, ath5k, rt2x00, etc) while
> > > > fallout from Dave Miller's multiqueue patches is fixed up. mac80211
> > > > was incorrectly using the skb->cb field that the multiqueue patches
> > > > are now also using, and that conflict is causing a lot of random
> > > > weirdness.
> > >
> > > Like not being able to associate with an AP?
> >
> > Definitely. That doesn't mean your problem is caused by this upstream
> > breakage, but that's got to get fixed before we could debug the issue at
> > all.
>
> FWIW I'm also seeing these issues with iwl3945 in
> kernel-2.6.25.10-47.fc8. Is there an open BZ on this?

That specific kernel version shouldn't be related to the upstream
multiqueue stuff though; only rawhide should be affected here.

Dan


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Old 08-01-2008, 02:05 PM
"Richard W.M. Jones"
 
Default Anyone seeing serious network breakage in current Rawhide?

On Fri, Aug 01, 2008 at 09:38:32AM -0400, Michael Solberg wrote:
> FWIW I'm also seeing these issues with iwl3945 in
> kernel-2.6.25.10-47.fc8. Is there an open BZ on this?

Not that I'm aware of. The BZ mentioned earlier in this thread
appears to related to something quite different (broken IPv6 DNS
servers). If you open one, please let us know.

Rich.

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Old 08-01-2008, 03:01 PM
Michael Solberg
 
Default Anyone seeing serious network breakage in current Rawhide?

On Fri, 2008-08-01 at 15:05 +0100, Richard W.M. Jones wrote:
> On Fri, Aug 01, 2008 at 09:38:32AM -0400, Michael Solberg wrote:
> > FWIW I'm also seeing these issues with iwl3945 in
> > kernel-2.6.25.10-47.fc8. Is there an open BZ on this?
>
> Not that I'm aware of. The BZ mentioned earlier in this thread
> appears to related to something quite different (broken IPv6 DNS
> servers). If you open one, please let us know.

I will - I was responding to Ralf's comment about not being able to
associate with APs - the latest FC8 kernel associates and un-associates
at random for me, while the previous version doesn't. I just poked
around and didn't see an open bug for it.

Michael.


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