[uml-devel] Re: Hang at ipv4 setup is a cpufreq issue!

[uml-devel] Re: Hang at ipv4 setup is a cpufreq issue!

[roland]

see: http://www.redhat.com/archives/fedora-test-list/2003-July/msg01141.html

maybe this is valuable information for all "underclockers" of you :)

regards
roland



----- Original Message ----- 
From: "roland" <for_spam@gmx.de>
To: "BlaisorBlade" <blaisorblade_spam@yahoo.it>; <user-mode-linux-devel@lists.sourceforge.net>; "Jeff Dike" <jdike@addtoit.com>
Cc: "uml-user" <user-mode-linux-user@lists.sourceforge.net>
Sent: Thursday, March 04, 2004 12:11 AM
Subject: Hang at ipv4 setup is a cpufreq issue!


> hi paolo,
> no - this doesnt help fixing the "hang at NET:..." bug.
>
> but the mail from jonathan boler gave the essential hint and i tried further.
> conclusion: this bug indeed seems to be related to cpu frequency!
>
> so - what did i do ?
>
> i did an
> "modprobe p4-clockmod"
> and then
> "echo 0%40%50%performance >/proc/cpufreq"
> to reduce the speed of my 2.6 ghz p4 (40% minimum, 50% maximum)
>
> and........
>
> THE UML STARTS FINE AND THE HANG AT IPV4 SETUP IS GONE!
>
> so - this is the workaround.
>
> now we need a patch ;)
>
> do we need the so called "rtc fix" ?
> does it exist already for 2.6 kernel ?
>
> regards
> roland
>
>
>
> ----- Original Message ----- 
> From: "BlaisorBlade" <blaisorblade_spam@yahoo.it>
> To: <user-mode-linux-user@lists.sourceforge.net>
> Sent: Tuesday, March 02, 2004 8:05 PM
> Subject: Re: [uml-user] Hang at ipv4 setup
>
>
> Alle 11:07, lunedì 1 marzo 2004, Jonathan Boler ha scritto:
> > I was just wondering if there has there been any progress in fixing the
> > hang at NET: Registered protocol family 2 bug ?
> >
> > Is there a patch available ?
> >
> > Thanks
> >
> > Jonathan
>
> Yes. At least, it should work (that is a fix for what we think is another
> symptom of the your bug). Get these two patches and apply them with patch -l
> -p1 (it is a little mangled for spaces by the mailer). So, please report even
> if you get success. If you have any problem, try using only the first one.
>
> http://marc.theaimsgroup.com/?l=user-mode-linux-devel&m=107781791123823&w=2
>
> http://marc.theaimsgroup.com/?l=user-mode-linux-devel&m=107699168512707&w=2
> -- 
> Paolo Giarrusso, aka Blaisorblade
> Linux registered user n. 292729
>
>
>
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>



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[uml-devel] Hang at ipv4 setup is a cpufreq issue!

[roland]

hi paolo,
no - this doesnt help fixing the "hang at NET:..." bug.

but the mail from jonathan boler gave the essential hint and i tried further.
conclusion: this bug indeed seems to be related to cpu frequency!

so - what did i do ?

i did an
"modprobe p4-clockmod"
and then
"echo 0%40%50%performance >/proc/cpufreq"
to reduce the speed of my 2.6 ghz p4 (40% minimum, 50% maximum)

and........

THE UML STARTS FINE AND THE HANG AT IPV4 SETUP IS GONE!

so - this is the workaround.

now we need a patch ;)

do we need the so called "rtc fix" ?
does it exist already for 2.6 kernel ?

regards
roland



----- Original Message ----- 
From: "BlaisorBlade" <blaisorblade_spam@yahoo.it>
To: <user-mode-linux-user@lists.sourceforge.net>
Sent: Tuesday, March 02, 2004 8:05 PM
Subject: Re: [uml-user] Hang at ipv4 setup


Alle 11:07, lunedì 1 marzo 2004, Jonathan Boler ha scritto:
> I was just wondering if there has there been any progress in fixing the
> hang at NET: Registered protocol family 2 bug ?
>
> Is there a patch available ?
>
> Thanks
>
> Jonathan

Yes. At least, it should work (that is a fix for what we think is another
symptom of the your bug). Get these two patches and apply them with patch -l
-p1 (it is a little mangled for spaces by the mailer). So, please report even
if you get success. If you have any problem, try using only the first one.

http://marc.theaimsgroup.com/?l=user-mode-linux-devel&m=107781791123823&w=2

http://marc.theaimsgroup.com/?l=user-mode-linux-devel&m=107699168512707&w=2
-- 
Paolo Giarrusso, aka Blaisorblade
Linux registered user n. 292729



-------------------------------------------------------
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Build and deploy apps & Web services for Linux with
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[uml-devel] Re: Hang at ipv4 setup is a cpufreq issue!

[Jeff Dike]

for_spam@gmx.de said:
> i did an "modprobe p4-clockmod" and then "echo 0%40%50%performance >/
> proc/cpufreq" to reduce the speed of my 2.6 ghz p4 (40% minimum, 50%
> maximum)
> and........
> THE UML STARTS FINE AND THE HANG AT IPV4 SETUP IS GONE!
> so - this is the workaround.
> now we need a patch ;)
> do we need the so called "rtc fix" ? does it exist already for 2.6
> kernel ? 

2.4 and 2.6 are identical as far as the rtc stuff goes.  So, there's something
else wrong.  I'm wondering whether this is somehow related to the rdtsc
problem that came up recently.

				Jeff



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[uml-devel] Re: Hang at ipv4 setup is a cpufreq issue!

[Jeff Dike]

for_spam@gmx.de said:
> THE UML STARTS FINE AND THE HANG AT IPV4 SETUP IS GONE! 

Excellent.  Thanks for tracking it down and letting us know what the problem
was.

				Jeff



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