Re: [linux-vrf-core] VRF number limitation

[Cho K. H. <dru...@ho...>]

"possibly" the problem of the limit of the kernel stack size.. as linux-vrf 
0.900 patch lets the kernel keep routing table(fib_table)s as many as 
VRF_MAX and other structures also. 

Linux kernel really has a hard(and low) limit on its stack size and when 
the stack overflow happens, it is possible to see kernel panic.. 

i'm really not sure about it as i tried only 8 with my VRF_MAX. 


==========================
행복한 현재가 좋다!

dru...@ho... (조경현)



>From: Affandi Indraji <aff...@gm...>
>Reply-To: Affandi Indraji <aff...@gm...>
>To: lin...@li...
>Subject: Re: [linux-vrf-core] VRF number limitation
>Date: Mon, 18 Jul 2005 15:00:56 +0800
>
>Thanks to Steffen and Kyung Hyun,
>
>I'm able to set more than 8 vrf, after I modify rtnetlink.h. The max
>that i can configure is 190, if more than that i can't boot, the
>system said that "kernel panic" and the system hang. Just curious, how
>many vrf is the max number that can be configured?
>
>Another thing is, i can boot using the kernel with 190 vrf, but once i
>run something (i run "tar xjf" on a file), it said that "system out of
>memory" and i was kicked out from the SSH session, or if i'm in the
>console, i will be automatically logout. Any of you know about the
>limitation of the max number of VRF whereby the server can still run
>with the stable condition?
>
>Really appreciate your help. Thanks.
>
>Regards,
>Fandi
>
>On 7/14/05, Cho Kyung Hyun <dru...@ho...> wrote:
> > The parameter VRF_MAX is included in rtnetlink.h if the kernel
> > source(header) has been "patched" with linux-vrf 0.900.
> >
> > You may change the value of VRF_MAX(which is 7 by default) to whichever 
u
> > like, and the re-compiled kernel will be capable to create vrfs as many 
as
> > u designated in rtnetlink.h.
> >
> > i hope it answers.
> >
> > have a great day.
> >
> >
> > ==========================
> > 행복한 현재가 좋다!
> >
> > dru...@ho... (조경현)
> >
> >
> >
> > >From: Affandi Indraji <aff...@gm...>
> > >Reply-To: Affandi Indraji <aff...@gm...>
> > >To: lin...@li...
> > >Subject: [linux-vrf-core] VRF number limitation
> > >Date: Wed, 13 Jul 2005 14:36:14 +0800
> > >
> > >Hi,
> > >
> > >I would like to ask about the limitation of the VRF, i can only
> > >configure it up to 8 VRF (while 0 it's already being used). From di
> > >archive, i saw the reply about the limitation of the VRF, but i don't
> > >quite understand what it means. Here is the previous posting regarding
> > >the limitation on VRF.
> > 
>---------------------------------------------------------------------------------------------------------------------

> >
> > >Currently there is a hard limit of 8 VRFs (0-7).  While working out 
bugs I
> > >  have decided not to dynamically allocation all of the data 
structures
> > required
> > >  to keep track of TCP, UDP, and raw sockets per VRF.
> > >
> > >  Until I make the conversion to dynamically allocating per VRF data 
you
> > can
> > >  change the compile time limit by modifying VRF_MAX in
> > >  linux/include/linux/rtnetlink.h
> > 
>--------------------------------------------------------------------------------------------------------------------

> >
> > >The question is is there any parameter that i can change so i can have
> > >more that 8 VRF? I have tried to find VRF_MAX variable in rtnetlink.h,
> > >but no luck.
> > >
> > >Really appreciate your help. Thank you
> > >
> > >--
> > >Regards,
> > >Affandi Indraji
> > >
> > >
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> >
> >
>
>
>--
>Regards,
>Affandi Indraji