* Re: Trouble with udevtrigger/udevsettle
2006-09-21 6:14 Trouble with udevtrigger/udevsettle Logan Rathbone
@ 2006-09-21 11:08 ` Bryan Kadzban
2006-09-21 19:29 ` Kay Sievers
` (2 subsequent siblings)
3 siblings, 0 replies; 5+ messages in thread
From: Bryan Kadzban @ 2006-09-21 11:08 UTC (permalink / raw)
To: linux-hotplug
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Oops, didn't send this to the list last time:
Bryan Kadzban wrote:
> Logan Rathbone wrote:
>
>>Thus I have to wait quite a while (about a minute or so) for
>>udevsettle to complete and have my bootup continue. Any ideas what
>>this could be about?
>
>
> Hmm... Just guessing here, but:
>
>
>>I never really have a network cable plugged into the via-rhine, but I
>>don't see why that would make a difference.
>
>
> Your distro may have a rule set up to try to ifup the interface when it
> sees an add event for it. If this ifup is trying to use DHCP, it *may*
> take a long time to fail when it can't find a DHCP server. I seem to
> remember a 30-second timeout with dhcpcd in the past, which it waits for
> twice; that would match up with the one-minute timing you're seeing.
>
> I would suspect that the DHCP client should to fail immediately if it
> doesn't detect a link, but I don't know for sure whether all of them do.
>
> You might try blacklisting via-rhine in modprobe.conf. That way you
> should never get an add event for eth0, and if the long delay is due to
> some rule that triggers from that, it shouldn't happen.
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^ permalink raw reply [flat|nested] 5+ messages in thread* Re: Trouble with udevtrigger/udevsettle
2006-09-21 6:14 Trouble with udevtrigger/udevsettle Logan Rathbone
2006-09-21 11:08 ` Bryan Kadzban
@ 2006-09-21 19:29 ` Kay Sievers
2006-09-22 3:10 ` Logan Rathbone
2006-09-22 15:21 ` Andrey Borzenkov
3 siblings, 0 replies; 5+ messages in thread
From: Kay Sievers @ 2006-09-21 19:29 UTC (permalink / raw)
To: linux-hotplug
On Thu, 2006-09-21 at 07:08 -0400, Bryan Kadzban wrote:
> Oops, didn't send this to the list last time:
>
> Bryan Kadzban wrote:
> > Logan Rathbone wrote:
> >
> >>Thus I have to wait quite a while (about a minute or so) for
> >>udevsettle to complete and have my bootup continue. Any ideas what
> >>this could be about?
> >
> >
> > Hmm... Just guessing here, but:
> >
> >
> >>I never really have a network cable plugged into the via-rhine, but I
> >>don't see why that would make a difference.
> >
> >
> > Your distro may have a rule set up to try to ifup the interface when it
> > sees an add event for it. If this ifup is trying to use DHCP, it *may*
> > take a long time to fail when it can't find a DHCP server. I seem to
> > remember a 30-second timeout with dhcpcd in the past, which it waits for
> > twice; that would match up with the one-minute timing you're seeing.
You may try to run "udevtest /class/net/eth0" and see what the event is
calling and which may take that long to finish. Your system/distro
should fix that by detaching with all such tools from the udev event
process, an operate in the background, instead of blocking the udev
queue.
Kay
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^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: Trouble with udevtrigger/udevsettle
2006-09-21 6:14 Trouble with udevtrigger/udevsettle Logan Rathbone
2006-09-21 11:08 ` Bryan Kadzban
2006-09-21 19:29 ` Kay Sievers
@ 2006-09-22 3:10 ` Logan Rathbone
2006-09-22 15:21 ` Andrey Borzenkov
3 siblings, 0 replies; 5+ messages in thread
From: Logan Rathbone @ 2006-09-22 3:10 UTC (permalink / raw)
To: linux-hotplug
Bryan Kadzban wrote:
> Oops, didn't send this to the list last time:
>
> Bryan Kadzban wrote:
>
>> Logan Rathbone wrote:
>>
>>
>>> Thus I have to wait quite a while (about a minute or so) for
>>> udevsettle to complete and have my bootup continue. Any ideas what
>>> this could be about?
>>>
>> Hmm... Just guessing here, but:
>>
>>
>>
>>> I never really have a network cable plugged into the via-rhine, but I
>>> don't see why that would make a difference.
>>>
>> Your distro may have a rule set up to try to ifup the interface when it
>> sees an add event for it. If this ifup is trying to use DHCP, it *may*
>> take a long time to fail when it can't find a DHCP server. I seem to
>> remember a 30-second timeout with dhcpcd in the past, which it waits for
>> twice; that would match up with the one-minute timing you're seeing.
>>
>> I would suspect that the DHCP client should to fail immediately if it
>> doesn't detect a link, but I don't know for sure whether all of them do.
>>
>> You might try blacklisting via-rhine in modprobe.conf. That way you
>> should never get an add event for eth0, and if the long delay is due to
>> some rule that triggers from that, it shouldn't happen.
>>
Yes, you are right! The udev SRPM I built from came from Mandriva, who
set up udev rules to automatically configure and start hotplugged
ethernet devices. I guess they don't use udevtrigger for coldplugging,
as that would probably produce the same problem I was having. I suppose
that I could reconfigure the rules to fork the dhclient process, but
then I'd possibly risk a race condition with some later services (not
likely, but possible). But I guess I'm doing that anyway since my
'network' initscript uses ifplugd to bring the interfaces up.
But I digress! Maybe in the future I'll toy around with it and have
udev rules handle the configuration and starting/stopping of my ethernet
devices, but I certainly don't need that functionality atm.
Thanks for your help, guys.
--Logan
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^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: Trouble with udevtrigger/udevsettle
2006-09-21 6:14 Trouble with udevtrigger/udevsettle Logan Rathbone
` (2 preceding siblings ...)
2006-09-22 3:10 ` Logan Rathbone
@ 2006-09-22 15:21 ` Andrey Borzenkov
3 siblings, 0 replies; 5+ messages in thread
From: Andrey Borzenkov @ 2006-09-22 15:21 UTC (permalink / raw)
To: linux-hotplug
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On Friday 22 September 2006 07:10, Logan Rathbone wrote:
> The udev SRPM I built from came from Mandriva, who
> set up udev rules to automatically configure and start hotplugged
> ethernet devices. I guess they don't use udevtrigger for coldplugging,
not yet. Should be in post-2007
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^ permalink raw reply [flat|nested] 5+ messages in thread