ext4: log a resize update to the console every 10 seconds

For very long online resizes, a periodic update to the console log is
helpful for debugging and for progress reporting.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

1 files changed, 8 insertions, 0 deletions

diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c
index 5932ab5ca53f..3c9367b9bebd 100644
--- a/fs/ext4/resize.c
+++ b/fs/ext4/resize.c
@@ -1869,6 +1869,7 @@ int ext4_resize_fs(struct super_block *sb, ext4_fsblk_t n_blocks_count)
         ext4_group_t n_group;
         ext4_fsblk_t o_blocks_count;
         ext4_fsblk_t n_blocks_count_retry = 0;
+        unsigned long last_update_time = 0;
         int err = 0, flexbg_size = 1 << sbi->s_log_groups_per_flex;
         int meta_bg;
 
@@ -1977,6 +1978,13 @@ retry:
          */
         while (ext4_setup_next_flex_gd(sb, flex_gd, n_blocks_count,
                                               flexbg_size)) {
+                if (jiffies - last_update_time > HZ * 10) {
+                        if (last_update_time)
+                                ext4_msg(sb, KERN_INFO,
+                                         "resized to %llu blocks",
+                                         ext4_blocks_count(es));
+                        last_update_time = jiffies;
+                }
                 if (ext4_alloc_group_tables(sb, flex_gd, flexbg_size) != 0)
                         break;
                 err = ext4_flex_group_add(sb, resize_inode, flex_gd);