ext4: increase wait time needed before reuse of deleted inode numbers

Current wait times have proven to be too short to protect against inode reuses that lead to metadata inconsistencies. Now that we will retry the inode allocation if we can't find any recently deleted inodes, it's a lot safer to increase the recently deleted time from 5 seconds to a minute. Link: https://lore.kernel.org/r/[email protected] Google-Bug-Id: 36602237 Signed-off-by: Theodore Ts'o <[email protected]>
ambv · Apr 16, 2020 · a17a9d9 · a17a9d9
1 parent 6488141
commit a17a9d9
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c
@@ -662,7 +662,7 @@ static int find_group_other(struct super_block *sb, struct inode *parent,
  * block has been written back to disk.  (Yes, these values are
  * somewhat arbitrary...)
  */
-#define RECENTCY_MIN	5
+#define RECENTCY_MIN	60
 #define RECENTCY_DIRTY	300
 
 static int recently_deleted(struct super_block *sb, ext4_group_t group, int ino)