Hi
On 2010/03/25, at 1:47, Serge E. Hallyn wrote:
> Quoting Jiro SEKIBA (jir@xxxxxxxxxxxxxxxxx):
>>> If it doesn't work, can you please describe again the exact order of
>>> commands that you use and the reported error(s) ?
>>>
>> I'll let you know in any cases.
>>
>> Thank you very much for the advice
>
> Hi Jiro,
>
> Can you fetch the latest cr_tests
> (git clone git://git.sr71.net/~hallyn/cr_tests)
>
> and
> cd cr_tests; make; cd simple
> sh runtests.sh
>
> and tell me whether the second (restart --self) test succeeds?
> If it fails, can you send me the cr_*/log2 contents?
>
I've tried on ckpt-v20 and the above test looks OK.
And looks like self_checkpointing is working fine so far.
However, I'm still not able to restart external checkpoint correctly.
Here are the program and scripts I used for the test.
I used user-cr ckpt-v20 branch for checkpoint/restart program.
This time I disconnect the program from tty completely.
----------8<----------8<----------test.c----------8<----------8<----------
#include <stdio.h>
#include <unistd.h>
int main(void)
{
FILE *fp;
int i;
pid_t pid;
int st;
if(fork()) {
return 0;
} else {
waitpid(getppid(), &st, NULL);
close(0);
close(1);
close(2);
setsid();
if(fork()) {
return 0;
} else
waitpid(getppid(), &st, NULL);
}
//unlink("/tmp/test.out");
fp = fopen("/tmp/test.out","w");
for(i=0;i<10;i++) {
fprintf(fp,"%d\n",i);
fflush(fp);
sleep(1);
}
fclose(fp);
return 0;
}
----------8<----------8<----------test.c----------8<----------8<----------
----------8<----------8<----------checkpoint.sh----------8<----------8<----------
#!/bin/sh
CLOG=checkpoint.log
RLOG=restart.log
rm -f $CLOG $RLOG
./test &
sleep 1
PID=$(ps x | grep test | grep -v grep |cut -f 2 -d' ')
sleep 2
echo $PID > /cgroup/0/tasks
echo FROZEN > /cgroup/0/freezer.state
./checkpoint -l $CLOG -v $PID > ckpt.image
mv /tmp/test.out /tmp/test.out.orig
cp /tmp/test.out.orig /tmp/test.out
echo THAWED > /cgroup/0/freezer.state
./restart --pidns -l $RLOG -v -i ckpt.image;
----------8<----------8<----------checkpoint.sh----------8<----------8<----------
When I run the above script, I got following:
# mount -t cgroup -o freezer cgroup /cgroup
# mkdir /cgroup/0
# sh checkpoint.sh
checkpoint id 8
Success
Then, I'm expecting to see number 0 to 9 in /tmp/test.out, but
I only got 0 to 3, which is the state I froze and checkpointed the process.
checkpoint.log and restart.log are empty.
I guess it means the programs worked fine.
I attached the dmesg I got by the single session of the script.
It looks the restart tries to reopen /tmp/test.out.
Could you give me any clues that I should check with?
My environment is Virtualbox VM.
I tried both with VT and without VT.
No virtualbox guest module is installed.
Attachment:
dmesg.log
Description: Binary data
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