[GFS2] Remove all_list from lock_dlm

I discovered that we had a list onto which every lock_dlm
lock was being put. Its only function was to discover whether
we'd got any locks left after umount. Since there was already
a counter for that purpose as well, I removed the list. The
saving is sizeof(struct list_head) per glock - well worth
having.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

diff --git a/fs/gfs2/locking/dlm/lock.c b/fs/gfs2/locking/dlm/lock.c
index 894df45..2482c90 100644 (file)
--- a/fs/gfs2/locking/dlm/lock.c
+++ b/fs/gfs2/locking/dlm/lock.c
@@ -58,9 +58,6 @@ static void gdlm_delete_lp(struct gdlm_lock *lp)
        spin_lock(&ls->async_lock);
        if (!list_empty(&lp->delay_list))
                list_del_init(&lp->delay_list);
-       gdlm_assert(!list_empty(&lp->all_list), "%x,%llx", lp->lockname.ln_type,
-                   (unsigned long long)lp->lockname.ln_number);
-       list_del_init(&lp->all_list);
        ls->all_locks_count--;
        spin_unlock(&ls->async_lock);
 
@@ -397,7 +394,6 @@ static int gdlm_create_lp(struct gdlm_ls *ls, struct lm_lockname *name,
        INIT_LIST_HEAD(&lp->delay_list);
 
        spin_lock(&ls->async_lock);
-       list_add(&lp->all_list, &ls->all_locks);
        ls->all_locks_count++;
        spin_unlock(&ls->async_lock);
 
@@ -710,22 +706,3 @@ void gdlm_submit_delayed(struct gdlm_ls *ls)
        wake_up(&ls->thread_wait);
 }
 
-int gdlm_release_all_locks(struct gdlm_ls *ls)
-{
-       struct gdlm_lock *lp, *safe;
-       int count = 0;
-
-       spin_lock(&ls->async_lock);
-       list_for_each_entry_safe(lp, safe, &ls->all_locks, all_list) {
-               list_del_init(&lp->all_list);
-
-               if (lp->lvb && lp->lvb != junk_lvb)
-                       kfree(lp->lvb);
-               kfree(lp);
-               count++;
-       }
-       spin_unlock(&ls->async_lock);
-
-       return count;
-}
-

diff --git a/fs/gfs2/locking/dlm/lock_dlm.h b/fs/gfs2/locking/dlm/lock_dlm.h
index 845a27f..21cf466 100644 (file)
--- a/fs/gfs2/locking/dlm/lock_dlm.h
+++ b/fs/gfs2/locking/dlm/lock_dlm.h
@@ -74,7 +74,6 @@ struct gdlm_ls {
        spinlock_t              async_lock;
        struct list_head        delayed;
        struct list_head        submit;
-       struct list_head        all_locks;
        u32             all_locks_count;
        wait_queue_head_t       wait_control;
        struct task_struct      *thread;
@@ -112,7 +111,6 @@ struct gdlm_lock {
        unsigned long           flags;          /* lock_dlm flags LFL_ */
 
        struct list_head        delay_list;     /* delayed */
-       struct list_head        all_list;       /* all locks for the fs */
        struct gdlm_lock        *hold_null;     /* NL lock for hold_lvb */
 };
 

diff --git a/fs/gfs2/locking/dlm/mount.c b/fs/gfs2/locking/dlm/mount.c
index fa31c54..947e706 100644 (file)
--- a/fs/gfs2/locking/dlm/mount.c
+++ b/fs/gfs2/locking/dlm/mount.c
@@ -28,7 +28,6 @@ static struct gdlm_ls *init_gdlm(lm_callback_t cb, struct gfs2_sbd *sdp,
        spin_lock_init(&ls->async_lock);
        INIT_LIST_HEAD(&ls->delayed);
        INIT_LIST_HEAD(&ls->submit);
-       INIT_LIST_HEAD(&ls->all_locks);
        init_waitqueue_head(&ls->thread_wait);
        init_waitqueue_head(&ls->wait_control);
        ls->jid = -1;
@@ -173,7 +172,6 @@ out:
 static void gdlm_unmount(void *lockspace)
 {
        struct gdlm_ls *ls = lockspace;
-       int rv;
 
        log_debug("unmount flags %lx", ls->flags);
 
@@ -187,9 +185,7 @@ static void gdlm_unmount(void *lockspace)
        gdlm_kobject_release(ls);
        dlm_release_lockspace(ls->dlm_lockspace, 2);
        gdlm_release_threads(ls);
-       rv = gdlm_release_all_locks(ls);
-       if (rv)
-               log_info("gdlm_unmount: %d stray locks freed", rv);
+       BUG_ON(ls->all_locks_count);
 out:
        kfree(ls);
 }