cryo does not (cannot ?) recreate files if the application created a file before checkpoint and the file does not exist at the time of restart. Note that the 'flags' field in '/proc/$pid/fdinfo/$fd' will not have the O_CREAT (or O_TRUNC, O_EXCL, O_NOCTTY) flags. These are cleared in __dentry_open()). At the time of restart, is there a way for cryo to know that the file must be created ? To reproduce: - run following program, - checkpoint after the first printf - rm /tmp/foo1 - restart # fails to open file during restart --- #include <stdio.h> #include <unistd.h> #include <errno.h> #include <sys/fcntl.h> main() { int fd; int i; char *buf = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"; fd = open("/tmp/foo1", O_RDWR|O_CREAT|O_TRUNC, 0666); if (fd < 0) { perror("open"); exit(1); } printf("%d: Opened '/tmp/foo1', fd %d\n", getpid(), fd); for (i = 0; i < strlen(buf); i++) { if (write(fd, &buf[i], 1) < 0) { printf("Error %d writing %c to file, i %d\n", errno, buf[i], i); exit(1); } printf("%d: i %d, wrote %c\n", getpid(), i, buf[i]); sleep(2); } } _______________________________________________ Containers mailing list Containers@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/containers