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Lei Yang | 1 Oct 2004 01:30

[uml-user] uml 2.6.8.1 doesn't compile

Dear fellows,

I've been trying to get uml kernel 2.6.8.1 compile and work for a while. 
I downloaded linux-2.6.8.1.tar.bz2 and uml-patch-2.6.8.1-1.bz2,  patched 
the kernel and 'make oldconfig ARCH=um'.
Then I did 'make linux ARCH=um' and goodness, a bounch of errors come out:

In file included from include/linux/capability.h:45,
                 from include/linux/sched.h:7,
                 from include/linux/module.h:10,
                 from init/main.c:16:
include/linux/spinlock.h:39:26: asm/spinlock.h: No such file or directory
In file included from include/linux/capability.h:45,
                 from include/linux/sched.h:7,
                 from include/linux/module.h:10,
                 from init/main.c:16:
include/linux/spinlock.h:397: error: parse error before "spinlock_t"
include/linux/spinlock.h:397: warning: function declaration isn't a 
prototype
In file included from include/linux/sched.h:7,
                 from include/linux/module.h:10,
                 from init/main.c:16:
include/linux/capability.h:47: error: parse error before 
"task_capability_lock"
include/linux/capability.h:47: warning: type defaults to `int' in 
declaration of `task_capability_lock'
include/linux/capability.h:47: warning: data definition has no type or 
storage class
In file included from include/linux/time.h:28,
                 from include/linux/timex.h:186,
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Damien Hull | 1 Oct 2004 02:02

[uml-user] how do I setup a netwrok

Here's what I have on my host system. (the one hosting the uml)
1. slack 10
2. kernel 2.4.26 ( the one from the cd)
3. I have /dev/net/tun
4. I have tap devices ie tun0, tun1 etc

here's what I have for my uml.
1. uml kernel 2.6.8-1 with networking
2. slack 10 root file system
3. 128mb swap_fs

How do I connect my uml to the net? 
1. I would like to use the switch daemon if I could
2. Would like people to be able to access it from the Internet. 

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Jeff Dike | 1 Oct 2004 03:32

Re: [uml-user] uml 2.6.8.1 doesn't compile

lya755 <at> ece.northwestern.edu said:
> the configuration is almost by default.

"almost"  Why so vague?  If CONFIG_SMP is in there, turn it off.

				Jeff

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Jeff Dike | 1 Oct 2004 04:30

Re: [uml-user] AMD 64 support

Johan.Verrept <at> advalvas.be said:
>     is there x86_64 support? Even only compiling uml in 32bit mode
> under x86_64 would be nice.
>     how hard would it be to add full x86_64 support?

If you want the incremental patches page, you'll see x86_64 support going
in.

				Jeff

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Jeff Dike | 1 Oct 2004 04:32

Re: [uml-user] Intermittent issues executing uml_net

huber <at> alum.wpi.edu said:
> This works fine, most of the time.  Sometimes, eth0 fails to be
> configured on VM startup.  Looking in dmesg, the errno for execl'ing
> uml_net is 2 (ENOENT).

What exactly goes into dmesg?

> When I use mem=128M, uml_net always is found.  If I increase the
> memory size to 256, uml_net is almost never found.  If I boot using
> 128M, then reboot using 256M, it typically works. (with no other
> changes!)
>
> Strange?  I think so... 

Yeah, me too.

				Jeff

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Terry | 1 Oct 2004 05:07
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Re: [uml-user] whitebox install - installing via ssh

I am reading more on this error:
cannot set up thread-local storage: cannot set up LDT for thread-local storage

I am coming up with things that relate to NPTL.  I believe I can
disable this on the host system with:
export LD_ASSUME_KERNEL=2.2.5

Then run the installation but it isn't working, gives same behavior. 
Does this spark someone's thinking perhaps?

On Thu, 30 Sep 2004 08:31:52 -0500, Terry <td3201 <at> gmail.com> wrote:
> I am having problems installing it with both 2.4.26 and 2.4.21.  But
> it must not be a kernel issue, just a guess.  The host kernel is 2.6.
> 
> 
> 
> 
> On Thu, 30 Sep 2004 20:10:04 +1200, Peter
> <peter.repliesignored <at> rimuhosting.com> wrote:
> > UML and the new 2.6 threading libraries don't play nice.  Are you getting this error with a 2.6 UML kernel? 
Try installing using a 2.4 kernel.  Then rm /lib/tls.  And run the distro with 2.6 after that (or keep using
2.4 is your safest best).
> >
> > Cheers, Peter
> >
> >
> > ----- Original Message -----
> > From: "Terry" <td3201 <at> gmail.com>
> > To: <user-mode-linux-user <at> lists.sourceforge.net>
> > Sent: Thursday, September 30, 2004 5:12 PM
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Josh | 1 Oct 2004 05:44
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Re: [uml-user] Intermittent issues executing uml_net

Jeff Dike <jdike <at> addtoit.com> writes:

> huber <at> alum.wpi.edu said:
>> This works fine, most of the time.  Sometimes, eth0 fails to be
>> configured on VM startup.  Looking in dmesg, the errno for execl'ing
>> uml_net is 2 (ENOENT).
>
> What exactly goes into dmesg?

Here's what I get in dmesg when it works:

* modprobe tun
modprobe: Can't locate module tun
* ifconfig tap0 192.168.0.5 netmask 255.255.255.255 up
* bash -c echo 1 > /proc/sys/net/ipv4/ip_forward
* route add -host 192.168.0.11 dev tap0
* bash -c echo 1 > /proc/sys/net/ipv4/conf/tap0/proxy_arp
* arp -Ds 192.168.0.11 tap2 pub
* arp -Ds 192.168.0.11 tap1 pub
* arp -Ds 192.168.0.11 tap3 pub
* arp -Ds 192.168.0.11 eth0 pub

The options to the linux binary are:

ubd0=root_fs ubd1=cyrus_fs ubd2=www_fs ubd3=swapfile mem=256M
con=none con0=fd:0,fd:1 eth0=tuntap,,,192.168.0.5

I'm rebooting the VM right now with mem=256M...

(okay, it's working now.)
(Continue reading)

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Anthony Brock | 1 Oct 2004 06:11

RE: [uml-user] uml_mconsole and uml_kernel crashes after 5th proc meminfo

Martin,

You can find more information on this in the list archives. Specifically,
there is a work-around in the following article:

http://marc.theaimsgroup.com/?l=user-mode-linux-devel&m=109027118400445&w=2

Tony

> -----Original Message-----
> From: user-mode-linux-user-admin <at> lists.sourceforge.net
> [mailto:user-mode-linux-user-admin <at> lists.sourceforge.net]On Behalf Of
> Martin Weber
> Sent: Thursday, September 30, 2004 12:19 AM
> To: user-mode-linux-user <at> lists.sourceforge.net
> Subject: [uml-user] uml_mconsole and uml_kernel crashes after 5th proc
> meminfo
>
>
> Hi,
>
> When I call "proc meminfo" from the uml_mconsole around the 5th
> time both uml_mconsole and uml_kernel crashes.
> This happens with kernel 2.6.7 and uml-patch-2 and with kernel
> 2.6.8.1 and uml-patch-2.6.8.1-1.
> There seems to be no problem with kernel 2.4.23.
> Also "cat /proc/meminfo" from inside the uml-instance works correct.
>
> Does anybody know how to fix this proplem? Is there a patch or
> workaround?
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Johan Verrept | 1 Oct 2004 14:20
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Re: [uml-user] AMD 64 support

Jeff Dike wrote:

>Johan.Verrept <at> advalvas.be said:
>  
>
>>    is there x86_64 support? Even only compiling uml in 32bit mode
>>under x86_64 would be nice.
>>    how hard would it be to add full x86_64 support?
>>    
>>
>
>
>If you want the incremental patches page, you'll see x86_64 support going
>in.
>  
>

Thank you.
Can you tell me which of those patches I should apply to get a wrking build?
Since it seems to contain patches that do not build (x86-64-signals), I 
am reluctant to install them all.

regards,

    J.

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theo29 the29 | 1 Oct 2004 12:53
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[uml-user] More on kernel module debugging in 2.6.*


One other thing concerning debugging kernel modules.

I must know the start address of the module in kernel memory to manually 
point gdb to it. The umlgdb script does this by using the variable 
module_list. This variable is however not in the 2.6.6 kernel. Does anybody 
know how to get the start-address of module in 2.6.6?

Regards, Halldor

-----------------------------------
I am trying to debug a kernel module of mine, by using the umlgdb script. I 
follow all instructions (i.e. start the
kernel with the parameters output from umlgdb, before hitting enter), but I 
get an error when trying to attach:

(gdb) att 1
Attaching to program: 
/home/halldorisak/workspace/UserModeLinux-2.6.6/linux-2.6.6/linux, process 1
ptrace: Operation not permitted.

I am using skas-patch. Anybody knows why gdb won't attach? Otherwise I guess 
I need to just do this manually,
without umlgdb.

There was some post reporting the same problem a while ago, that person was 
also using skas. However I couldn't find
any solution to that problem there.

Regards, Halldor
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Gmane