btrfs: don't print information about space cache or tree every remount

btrfs currently prints information about space cache or free space tree
being in use on every remount, regardless whether such remount actually
enabled or disabled one of these features.

This is actually unnecessary since providing remount options changing the
state of these features will explicitly print the appropriate notice.

Let's instead print such unconditional information just on an initial mount
to avoid filling the kernel log when, for example, laptop-mode-tools
remount the fs on some events.

Signed-off-by: Maciej S. Szmigiero <maciej.szmigiero@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index f89beac3c665630982bff57c8a09d3706e32e4b3..f1c6ca59299e605f1d77234d4c16546e861636a9 100644 (file)
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -626,6 +626,7 @@ int btrfs_parse_options(struct btrfs_fs_info *info, char *options,
        int saved_compress_level;
        bool saved_compress_force;
        int no_compress = 0;
+       const bool remounting = test_bit(BTRFS_FS_STATE_REMOUNTING, &info->fs_state);
 
        if (btrfs_fs_compat_ro(info, FREE_SPACE_TREE))
                btrfs_set_opt(info->mount_opt, FREE_SPACE_TREE);
@@ -1137,10 +1138,12 @@ out:
        }
        if (!ret)
                ret = btrfs_check_mountopts_zoned(info);
-       if (!ret && btrfs_test_opt(info, SPACE_CACHE))
-               btrfs_info(info, "disk space caching is enabled");
-       if (!ret && btrfs_test_opt(info, FREE_SPACE_TREE))
-               btrfs_info(info, "using free space tree");
+       if (!ret && !remounting) {
+               if (btrfs_test_opt(info, SPACE_CACHE))
+                       btrfs_info(info, "disk space caching is enabled");
+               if (btrfs_test_opt(info, FREE_SPACE_TREE))
+                       btrfs_info(info, "using free space tree");
+       }
        return ret;
 }