Re: Testing Linux-CR -- Some Documentation

["Serge E. Hallyn" <serge-A9i7LUbDfNHQT0dZR+AlfA@public.gmane.org>]

Quoting Raghu D K (dk.raghu-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org):
> Hello All,
> 
> Further to some checking out the sources ( linux-cr, user-cr and
> test-cr ), I was able to make some progress after reading the
> "linux/Documentation/checkpoint".
> I just wanted to summarize the steps I did for reaching what I see. I
> have a Ubuntu 10.10 64-bit machine ( however I have installed only a
> 32-bit ) Ubuntu version.
> 
> Checking out Source Code:
> 
> 1. $ mkdir test-linux-cr
> 2. $ git clone git://www.linux-cr.org/pub/git/linux-cr
> 3. $ git clone git://www.linux-cr.org/pub/git/user-cr
> 4. $ git clone git://www.linux-cr.org/pub/git/tests-cr
> 
> I am behind a firewall so I had to configure my proxy setting since
> GIT server port "9418" was not open, this is well documented in the
> community. However for completeness.
> 
> Setting Proxy:
> 
> $ apt-get install socat
> 
> Create a file "gitproxy.sh" and give it execute permission.
> 
> #!/bin/bash
> _proxy=<your proxy ip>
> _proxyport=<your port>
> 
> exec socat STDIO PROXY:$_proxy:$1:$2,proxyport=$_proxyport
> 
> Edit ".bashrc" or ".profile" file and add
> 
> $ export GIT_PROXY_COMMAND=$(HOME)/gitproxy.sh
> 
> Compiling and Building Linux Kernel:
> 
> 1. Since I have a Ubuntu 10.10 running, I used the kernel
> configuration file "config-2.6.35-28-generic" from "/boot" folder
> 
> $ cp /boot/config-2.6.35-28-generic ~test-linux-cr/linux-cr/.config
> 
> Ensure the following tokens are enabled in the ".config" file.
> CONFIG_CHECKPOINT_SUPPORT=y
> CONFIG_SYSVIPC_CHECKPOINT=y
> CONFIG_CHECKPOINT=y
> CONFIG_NETNS_CHECKPOINT=y
> CONFIG_CHECKPOINT_DEBUG=y
> CONFIG_CGROUPS=y
> CONFIG_CGROUP_FREEZER=y
> CONFIG_NAMESPACES=y
> CONFIG_CGROUP_NS=y
> CONFIG_UTS_NS=y
> CONFIG_IPC_NS=y
> CONFIG_USER_NS=y
> CONFIG_PID_NS=y
> CONFIG_NET_NS=y
> CONFIG_FREEZER=y
> 
> $ sudo fakeroot make-kpkg --intrd --append-to-version=-cr kernel_image
> kernel_headers
> 
> On a successful build we'll have two ".deb" packages for "kernel" and
> "headers" and they can be installed with
> 
> $ sudo dpkg -i linux-image-2.6.37-cr.Custom_i386.deb
> $ sudo dpkg -i linux-headers-2.6.37-cr.Custom_i386.deb
> 
> On the Ubuntu 10.10 the GRUB2 is automatically updated when the

Heh, right bc it's on 2.6.35.  If you were on natty, you'd have
to force it since it comes with 2.6.38.

Got lucky :)

> package is successfully installed. Reboot and you are in
> "Checkpoint/Reset" capable kernel :-)
> 
> Building "user-cr" and "tests-cr":
> $ cd ~/test-linux-cr/user-cr
> $ cd scripts
> $ bash ./extract-headers.sh --kernel-src=< path to Linux kernel>
> $ cd ..
> $ make all
> 
> $ cd ~/test-linux-cr/tests-cr
> $ bash ./rewrite-cr-header.sh --- This will create a "cr.h" header
> file with appropriate macro defines for "__NR_checkpoint" and
> "__NR_restart"
> $ make all
> $ cd simple
> $ ./ckpt
> $ cat /tmp/cr-test.out
> Invoking checkpoint syscall... PASSED.
> ret = 1
> 
> $ restart < /tmp/out
> Invoking checkpoint syscall... PASSED.
> ret = 0
> 
> However I was not able to run the test scripts ( runall.sh ) as it
> gave some errors. Also analyzing the "out" file using "ckptinfo"
> results in EOF error.
> Any additional help on this is appreciated.

Since you're on Ubuntu, sh points to dah, so many cr_tests will break
because they expect sh to point to bash.  You can fix that by going
through all the scripts and changing that.  I haven't had a chance to do
so yet, and definately won't today.  If you go through the effort,
please feel free to send a patch to Oren or myself.

Once you fix that, you'll likely still have trouble, but it'll look much
better than what you see right now.  There definately are some bugs in
the 2.6.37 tree.  If you can help us debug those that would be terrific.

thanks,
-serge