diff options
| -rw-r--r-- | mdmon.c | 14 |
1 files changed, 11 insertions, 3 deletions
@@ -171,6 +171,7 @@ static void try_kill_monitor(pid_t pid, char *devname, int sock) int fd; int n; long fl; + int rv; /* first rule of survival... don't off yourself */ if (pid == getpid()) @@ -201,9 +202,16 @@ static void try_kill_monitor(pid_t pid, char *devname, int sock) fl &= ~O_NONBLOCK; fcntl(sock, F_SETFL, fl); n = read(sock, buf, 100); - /* Ignore result, it is just the wait that - * matters - */ + + /* If there is I/O going on it might took some time to get to + * clean state. Wait for monitor to exit fully to avoid races. + * Ping it with SIGUSR1 in case that it is sleeping */ + for (n = 0; n < 25; n++) { + rv = kill(pid, SIGUSR1); + if (rv < 0) + break; + usleep(200000); + } } void remove_pidfile(char *devname) |