ext4, jbd2: Drop unneeded printks at mount and unmount time

There are a number of kernel printk's which are printed when an ext4
filesystem is mounted and unmounted.  Disable them to economize space
in the system logs.  In addition, disabling the mballoc stats by
default saves a number of unneeded atomic operations for every block
allocation or deallocation.

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

diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 10a6309..10539e3 100644 (file)
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -2380,6 +2380,7 @@ void ext4_ext_init(struct super_block *sb)
         */
 
        if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS)) {
+#if defined(AGGRESSIVE_TEST) || defined(CHECK_BINSEARCH) || defined(EXTENTS_STATS)
                printk(KERN_INFO "EXT4-fs: file extents enabled");
 #ifdef AGGRESSIVE_TEST
                printk(", aggressive tests");
@@ -2391,6 +2392,7 @@ void ext4_ext_init(struct super_block *sb)
                printk(", stats");
 #endif
                printk("\n");
+#endif
 #ifdef EXTENTS_STATS
                spin_lock_init(&EXT4_SB(sb)->s_ext_stats_lock);
                EXT4_SB(sb)->s_ext_min = 1 << 30;

diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index c73d439..3e2320e 100644 (file)
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -2712,8 +2712,6 @@ int ext4_mb_init(struct super_block *sb, int needs_recovery)
 
        if (sbi->s_journal)
                sbi->s_journal->j_commit_callback = release_blocks_on_commit;
-
-       printk(KERN_INFO "EXT4-fs: mballoc enabled\n");
        return 0;
 }
 

diff --git a/fs/ext4/mballoc.h b/fs/ext4/mballoc.h
index 188d3d7..14f25f2 100644 (file)
--- a/fs/ext4/mballoc.h
+++ b/fs/ext4/mballoc.h
@@ -84,7 +84,7 @@ extern u8 mb_enable_debug;
  * with 'ext4_mb_stats' allocator will collect stats that will be
  * shown at umount. The collecting costs though!
  */
-#define MB_DEFAULT_STATS               1
+#define MB_DEFAULT_STATS               0
 
 /*
  * files smaller than MB_DEFAULT_STREAM_THRESHOLD are served

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 3f7e701..e5b206a 100644 (file)
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -1673,13 +1673,6 @@ static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es,
                        EXT4_INODES_PER_GROUP(sb),
                        sbi->s_mount_opt);
 
-       if (EXT4_SB(sb)->s_journal) {
-               ext4_msg(sb, KERN_INFO, "%s journal on %s",
-                      EXT4_SB(sb)->s_journal->j_inode ? "internal" :
-                      "external", EXT4_SB(sb)->s_journal->j_devname);
-       } else {
-               ext4_msg(sb, KERN_INFO, "no journal");
-       }
        return res;
 }
 
@@ -2885,12 +2878,12 @@ no_journal:
                         "available");
        }
 
-       if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) {
+       if (test_opt(sb, DELALLOC) &&
+           (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA)) {
                ext4_msg(sb, KERN_WARNING, "Ignoring delalloc option - "
                         "requested data journaling mode");
                clear_opt(sbi->s_mount_opt, DELALLOC);
-       } else if (test_opt(sb, DELALLOC))
-               ext4_msg(sb, KERN_INFO, "delayed allocation enabled");
+       }
 
        err = ext4_setup_system_zone(sb);
        if (err) {
@@ -3202,9 +3195,7 @@ static int ext4_load_journal(struct super_block *sb,
                        return -EINVAL;
        }
 
-       if (journal->j_flags & JBD2_BARRIER)
-               ext4_msg(sb, KERN_INFO, "barriers enabled");
-       else
+       if (!(journal->j_flags & JBD2_BARRIER))
                ext4_msg(sb, KERN_INFO, "barriers disabled");
 
        if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) {

diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
index 53b86e1..977a8da 100644 (file)
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -136,10 +136,6 @@ static int kjournald2(void *arg)
        journal->j_task = current;
        wake_up(&journal->j_wait_done_commit);
 
-       printk(KERN_INFO "kjournald2 starting: pid %d, dev %s, "
-              "commit interval %ld seconds\n", current->pid,
-              journal->j_devname, journal->j_commit_interval / HZ);
-
        /*
         * And now, wait forever for commit wakeup events.
         */
@@ -223,7 +219,8 @@ static int jbd2_journal_start_thread(journal_t *journal)
 {
        struct task_struct *t;
 
-       t = kthread_run(kjournald2, journal, "kjournald2");
+       t = kthread_run(kjournald2, journal, "jbd2/%s",
+                       journal->j_devname);
        if (IS_ERR(t))
                return PTR_ERR(t);
 
@@ -1115,7 +1112,7 @@ journal_t * jbd2_journal_init_inode (struct inode *inode)
        while ((p = strchr(p, '/')))
                *p = '!';
        p = journal->j_devname + strlen(journal->j_devname);
-       sprintf(p, ":%lu", journal->j_inode->i_ino);
+       sprintf(p, "-%lu", journal->j_inode->i_ino);
        jbd_debug(1,
                  "journal %p: inode %s/%ld, size %Ld, bits %d, blksize %ld\n",
                  journal, inode->i_sb->s_id, inode->i_ino,