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[GFS2] Remove all_list from lock_dlm

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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>
This commit is contained in:
Steven Whitehouse 2008-06-04 15:06:21 +01:00
parent b2cad26cfc
commit 31fcba00fe
3 changed files with 1 additions and 30 deletions
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23
fs/gfs2/locking/dlm/lock.c
View file

@ -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;
}

2
fs/gfs2/locking/dlm/lock_dlm.h
View file

@ -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 */
};

6
fs/gfs2/locking/dlm/mount.c
View file

@ -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 @@ static int gdlm_mount(char *table_name, char *host_data,
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);
}