ext4: fix lazyinit hang after removing request

When the request has been removed from the list and no other request
has been issued, we will end up with next wakeup scheduled to
MAX_JIFFY_OFFSET which is bad. So check for that.

Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 40131b777af66c3112bb1df16265faadac435d0f..8d1d9423ce9a61dfd3bbff7bce085b45aa9ab574 100644 (file)
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -2740,7 +2740,8 @@ cont_thread:
                if (freezing(current))
                        refrigerator();
 
-               if (time_after_eq(jiffies, next_wakeup)) {
+               if ((time_after_eq(jiffies, next_wakeup)) ||
+                   (MAX_JIFFY_OFFSET == next_wakeup)) {
                        cond_resched();
                        continue;
                }