ocfs2: move dlm work to a private work queue
The work that is done can block for long periods of time and so is not
appropriate for keventd.
Signed-off-by: Kurt Hackel <kurt.hackel@oracle.com>
Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
diff --git a/fs/ocfs2/dlm/dlmcommon.h b/fs/ocfs2/dlm/dlmcommon.h
index 9bea5c6..9bdc9cf 100644
--- a/fs/ocfs2/dlm/dlmcommon.h
+++ b/fs/ocfs2/dlm/dlmcommon.h
@@ -131,6 +131,7 @@
struct o2hb_callback_func dlm_hb_down;
struct task_struct *dlm_thread_task;
struct task_struct *dlm_reco_thread_task;
+ struct workqueue_struct *dlm_worker;
wait_queue_head_t dlm_thread_wq;
wait_queue_head_t dlm_reco_thread_wq;
wait_queue_head_t ast_wq;
diff --git a/fs/ocfs2/dlm/dlmdomain.c b/fs/ocfs2/dlm/dlmdomain.c
index 3511930..c3462ea 100644
--- a/fs/ocfs2/dlm/dlmdomain.c
+++ b/fs/ocfs2/dlm/dlmdomain.c
@@ -303,11 +303,21 @@
return ret;
}
+static void dlm_destroy_dlm_worker(struct dlm_ctxt *dlm)
+{
+ if (dlm->dlm_worker) {
+ flush_workqueue(dlm->dlm_worker);
+ destroy_workqueue(dlm->dlm_worker);
+ dlm->dlm_worker = NULL;
+ }
+}
+
static void dlm_complete_dlm_shutdown(struct dlm_ctxt *dlm)
{
dlm_unregister_domain_handlers(dlm);
dlm_complete_thread(dlm);
dlm_complete_recovery_thread(dlm);
+ dlm_destroy_dlm_worker(dlm);
/* We've left the domain. Now we can take ourselves out of the
* list and allow the kref stuff to help us free the
@@ -1151,6 +1161,13 @@
goto bail;
}
+ dlm->dlm_worker = create_singlethread_workqueue("dlm_wq");
+ if (!dlm->dlm_worker) {
+ status = -ENOMEM;
+ mlog_errno(status);
+ goto bail;
+ }
+
do {
unsigned int backoff;
status = dlm_try_to_join_domain(dlm);
@@ -1191,6 +1208,7 @@
dlm_unregister_domain_handlers(dlm);
dlm_complete_thread(dlm);
dlm_complete_recovery_thread(dlm);
+ dlm_destroy_dlm_worker(dlm);
}
return status;
@@ -1256,6 +1274,7 @@
dlm->dlm_thread_task = NULL;
dlm->dlm_reco_thread_task = NULL;
+ dlm->dlm_worker = NULL;
init_waitqueue_head(&dlm->dlm_thread_wq);
init_waitqueue_head(&dlm->dlm_reco_thread_wq);
init_waitqueue_head(&dlm->reco.event);
diff --git a/fs/ocfs2/dlm/dlmmaster.c b/fs/ocfs2/dlm/dlmmaster.c
index f186e09..733d9a5 100644
--- a/fs/ocfs2/dlm/dlmmaster.c
+++ b/fs/ocfs2/dlm/dlmmaster.c
@@ -1962,7 +1962,7 @@
list_add_tail(&item->list, &dlm->work_list);
spin_unlock(&dlm->work_lock);
- schedule_work(&dlm->dispatched_work);
+ queue_work(dlm->dlm_worker, &dlm->dispatched_work);
return 0;
}
diff --git a/fs/ocfs2/dlm/dlmrecovery.c b/fs/ocfs2/dlm/dlmrecovery.c
index f0549e9..22e6a5b 100644
--- a/fs/ocfs2/dlm/dlmrecovery.c
+++ b/fs/ocfs2/dlm/dlmrecovery.c
@@ -157,12 +157,21 @@
struct list_head *iter, *iter2;
struct dlm_work_item *item;
dlm_workfunc_t *workfunc;
+ int tot=0;
+
+ if (!dlm_joined(dlm))
+ return;
spin_lock(&dlm->work_lock);
list_splice_init(&dlm->work_list, &tmp_list);
spin_unlock(&dlm->work_lock);
list_for_each_safe(iter, iter2, &tmp_list) {
+ tot++;
+ }
+ mlog(0, "%s: work thread has %d work items\n", dlm->name, tot);
+
+ list_for_each_safe(iter, iter2, &tmp_list) {
item = list_entry(iter, struct dlm_work_item, list);
workfunc = item->func;
list_del_init(&item->list);
@@ -851,7 +860,7 @@
spin_lock(&dlm->work_lock);
list_add_tail(&item->list, &dlm->work_list);
spin_unlock(&dlm->work_lock);
- schedule_work(&dlm->dispatched_work);
+ queue_work(dlm->dlm_worker, &dlm->dispatched_work);
dlm_put(dlm);
return 0;
@@ -1401,7 +1410,7 @@
spin_lock(&dlm->work_lock);
list_add_tail(&item->list, &dlm->work_list);
spin_unlock(&dlm->work_lock);
- schedule_work(&dlm->dispatched_work);
+ queue_work(dlm->dlm_worker, &dlm->dispatched_work);
leave:
dlm_put(dlm);