From: Christian Iwainsky (sichiwai_at_informatik.stud.uni-erlangen.de)
Date: Tue Oct 11 2005 - 05:52:18 PDT
Hello,
I have a problem, with the blcr.
I have written a distributed program, which is sucessfully checkpointed.
But once I try to restart the second instance on one machine of the
program, the cr_restart function aborts with:
cri_syscall(CR_OP_RSTRT_REAP): Invalid argument
in /var/log/messages:
Oct 11 14:15:40 faui21l kernel: thaw_threads returned error, aborting. -22
Oct 11 14:15:40 faui21l kernel: vmadump: invalid signature
Oct 11 14:15:40 faui21l kernel: thaw_threads returned error, aborting. -22
Oct 11 14:15:40 faui21l kernel: vmadump: invalid signature
Oct 11 14:15:40 faui21l kernel: thaw_threads returned error, aborting. -22
Oct 11 14:15:40 faui21l kernel: vmadump: invalid signature
Oct 11 14:15:40 faui21l kernel: thaw_threads returned error, aborting. -22
Oct 11 14:15:40 faui21l kernel: vmadump: invalid signature
Oct 11 14:15:40 faui21l kernel: thaw_threads returned error, aborting. -22
Oct 11 14:15:40 faui21l kernel: vmadump: invalid signature
Oct 11 14:15:40 faui21l kernel: thaw_threads returned error, aborting. -22
Oct 11 14:15:40 faui21l kernel: vmadump: invalid signature
Oct 11 14:15:40 faui21l kernel: thaw_threads returned error, aborting. -22
Oct 11 14:15:40 faui21l kernel: vmadump: invalid signature
Oct 11 14:15:40 faui21l kernel: thaw_threads returned error, aborting. -22
Oct 11 14:15:40 faui21l kernel: vmadump: invalid signature
Oct 11 14:15:40 faui21l kernel: thaw_threads returned error, aborting. -22
Oct 11 14:15:40 faui21l kernel: vmadump: invalid signature
Oct 11 14:15:40 faui21l kernel: thaw_threads returned error, aborting. -22
Oct 11 14:15:40 faui21l kernel: vmadump: invalid signature
Oct 11 14:15:40 faui21l kernel: thaw_threads returned error, aborting. -22
Oct 11 14:15:40 faui21l kernel: vmadump: invalid signature
Oct 11 14:15:40 faui21l kernel: thaw_threads returned error, aborting. -22
What is the problem? (The Pid is free)
I also experience an interesting behaviour:
I use the following code for the checkpoint-callback:
dsm_checkpoint_read is initialized to 0
/***********************************************************/
int chkpt_callback(void * aptr){
fprintf(stderr,"chkpt_callback\n");
if (!dsm_checkpoint_ready){
// the checkpoint thread function is asleap ... don't checkpoint yet
but awa
ken the checkpoint thread
dsm_checkpoint_sleep=0;
// postpone the checkpoint till jackal has a consistant state
fprintf(stderr,"Postponing checkpoint ..\n");
//cr_checkpoint(CR_CHECKPOINT_READY);
cr_checkpoint(CR_CHECKPOINT_TEMP_FAILURE);
return 0;
}
fprintf(stderr,"checkpopint callback: taking checkpoint\n");
int chkptResult=cr_checkpoint(CR_CHECKPOINT_READY);
if (chkptResult>0){
fprintf(stderr,"Restarting ...\n");
dsm_checkpoint_wakeup=1;
} else if (chkptResult==0){
fprintf(stderr,"checkpointing ........\n");
}else {
fprintf(stderr,"Checkpoint Failure\n");
cr_checkpoint(CR_CHECKPOINT_PERM_FAILURE);
return -1;
}
return 0;
}
one the callback postponed the checkpoint the program state is brought
to a checkpoint state, and then the cr_request_file is called to do the
real checkpoint.
The program crashes on the call to cr_request_file:
Regards,
Christian