Kernel 2.6.20 takes a long time to load

Kernel 2.6.20 takes a long time to load

[Helmut Auer]

Hello List,

The kernel 2.6.20 makes a long delay during booting ( about 15 seconds ) after showing:

NET: Registered protocol family 2

then it goes along with:

IP route cache hash table entries: 2048 (order: 1, 8192 bytes)
TCP established hash table entries: 8192 (order: 4, 98304 bytes)
...

I am using the kernel parameter lpj to avoid calculating processor speed during kernel load.
If I do not use the lpj parameter, the detection of cpu speed takes about 10 seconds, but then 
there is no delay after:
NET: Registered protocol family 2

Any hints what I can try to get a fast booting kernel ?
I am using 2.6.20 with some gentoo patches ( plain 2.6.20-4 has the same problem ).

My .config is here:
http://www.helmutauer.de/.config-2.6.20.3.gz

-- 
Helmut Auer, helmut@helmutauer.de

Re: Kernel 2.6.20 takes a long time to load

[Dave Jones]

On Sun, Mar 25, 2007 at 02:22:08PM +0200, Helmut Auer wrote:
 > Hello List,
 > 
 > The kernel 2.6.20 makes a long delay during booting ( about 15 seconds ) after showing:
 > 
 > NET: Registered protocol family 2
 > 
 > then it goes along with:
 > 
 > IP route cache hash table entries: 2048 (order: 1, 8192 bytes)
 > TCP established hash table entries: 8192 (order: 4, 98304 bytes)
 > ...
 > 
 > I am using the kernel parameter lpj to avoid calculating processor speed during kernel load.
 > If I do not use the lpj parameter, the detection of cpu speed takes about 10 seconds, but then 
 > there is no delay after:
 > NET: Registered protocol family 2
 > 
 > Any hints what I can try to get a fast booting kernel ?
 > I am using 2.6.20 with some gentoo patches ( plain 2.6.20-4 has the same problem ).

booting with initcall_debug will tell you the last thing it initialised before
the pause, which may give some clues.  Alternatively, git bisect ?

	Dave

-- 
http://www.codemonkey.org.uk

Re: Kernel 2.6.20 takes a long time to load

[Thomas Gleixner]

On Sun, 2007-03-25 at 14:22 +0200, Helmut Auer wrote:
> Hello List,
> 
> The kernel 2.6.20 makes a long delay during booting ( about 15 seconds ) after showing:
> 
> NET: Registered protocol family 2
> 
> then it goes along with:
> 
> IP route cache hash table entries: 2048 (order: 1, 8192 bytes)
> TCP established hash table entries: 8192 (order: 4, 98304 bytes)
> ...
> 
> I am using the kernel parameter lpj to avoid calculating processor speed during kernel load.
> If I do not use the lpj parameter, the detection of cpu speed takes about 10 seconds, but then 
> there is no delay after:
> NET: Registered protocol family 2
> 
> Any hints what I can try to get a fast booting kernel ?
> I am using 2.6.20 with some gentoo patches ( plain 2.6.20-4 has the same problem ).
> 
> My .config is here:
> http://www.helmutauer.de/.config-2.6.20.3.gz

Can you put up a complete bootlog too ?

	tglx