Comment updates

--HG--
branch : HEAD

diff --git a/src/lib/file-dotlock.c b/src/lib/file-dotlock.c
index 9f0a6b51bc0bdfd6206d80cd91dda2ee70b3976c..abaa4b717e87ecb1aeb67da1621a060bfdebbaa3 100644 (file)
--- a/src/lib/file-dotlock.c
+++ b/src/lib/file-dotlock.c
@@ -236,8 +236,10 @@ static int check_lock(time_t now, struct lock_info *lock_info)
        if (lock_info->have_pid) {
                /* we've local PID. Check if it exists. */
                if (kill(pid, 0) == 0 || errno != ESRCH) {
-                       if (pid != getpid())
+                       if (pid != getpid()) {
+                               /* process exists, don't override */
                                return 0;
+                       }
                        /* it's us. either we're locking it again, or it's a
                           stale lock file with same pid than us. either way,
                           recreate it.. */
@@ -434,6 +436,8 @@ static void dotlock_wait(struct lock_info *lock_info)
                usleep(LOCK_RANDOM_USLEEP_TIME);
                return;
        }
+       /* timeout after a random time even when using notify, since it
+          doesn't work reliably with e.g. NFS. */
        to = timeout_add(LOCK_RANDOM_USLEEP_TIME/1000,
                         dotlock_wait_end, ioloop);
        io_loop_run(ioloop);