Commit 4f1d756d authored by Xiubo Li's avatar Xiubo Li Committed by Ilya Dryomov
Browse files

ceph: add global total_caps to count the mdsc's total caps number 



This will help to reduce using the global mdsc->mutex lock in many
places.

Signed-off-by: default avatarXiubo Li <xiubli@redhat.com>
Reviewed-by: default avatarJeff Layton <jlayton@kernel.org>
Signed-off-by: default avatarIlya Dryomov <idryomov@gmail.com>
parent 3e699bd8

fs/ceph/caps.c

+2 −0
Original line number Diff line number Diff line
@@ -668,6 +668,7 @@ void ceph_add_cap(struct inode *inode, 
		spin_lock(&session->s_cap_lock);

		list_add_tail(&cap->session_caps, &session->s_caps);

		session->s_nr_caps++;

		atomic64_inc(&mdsc->metric.total_caps);

		spin_unlock(&session->s_cap_lock);

	} else {

		spin_lock(&session->s_cap_lock);
@@ -1161,6 +1162,7 @@ void __ceph_remove_cap(struct ceph_cap *cap, bool queue_release) 
	} else {

		list_del_init(&cap->session_caps);

		session->s_nr_caps--;

		atomic64_dec(&mdsc->metric.total_caps);

		cap->session = NULL;

		removed = 1;

	}

fs/ceph/debugfs.c

+2 −12
Original line number Diff line number Diff line
@@ -145,7 +145,7 @@ static int metric_show(struct seq_file *s, void *p) 
	struct ceph_fs_client *fsc = s->private;

	struct ceph_mds_client *mdsc = fsc->mdsc;

	struct ceph_client_metric *m = &mdsc->metric;

	int i, nr_caps = 0;

	int nr_caps = 0;

	s64 total, sum, avg, min, max, sq;



	seq_printf(s, "item          total       avg_lat(us)     min_lat(us)     max_lat(us)     stdev(us)\n");
@@ -190,17 +190,7 @@ static int metric_show(struct seq_file *s, void *p) 
		   percpu_counter_sum(&m->d_lease_mis),

		   percpu_counter_sum(&m->d_lease_hit));



	mutex_lock(&mdsc->mutex);

	for (i = 0; i < mdsc->max_sessions; i++) {

		struct ceph_mds_session *s;



		s = __ceph_lookup_mds_session(mdsc, i);

		if (!s)

			continue;

		nr_caps += s->s_nr_caps;

		ceph_put_mds_session(s);

	}

	mutex_unlock(&mdsc->mutex);

	nr_caps = atomic64_read(&m->total_caps);

	seq_printf(s, "%-14s%-16d%-16lld%lld\n", "caps", nr_caps,

		   percpu_counter_sum(&m->i_caps_mis),

		   percpu_counter_sum(&m->i_caps_hit));

fs/ceph/mds_client.c

+1 −0
Original line number Diff line number Diff line
@@ -1485,6 +1485,7 @@ int ceph_iterate_session_caps(struct ceph_mds_session *session, 
			cap->session = NULL;

			list_del_init(&cap->session_caps);

			session->s_nr_caps--;

			atomic64_dec(&session->s_mdsc->metric.total_caps);

			if (cap->queue_release)

				__ceph_queue_cap_release(session, cap);

			else

fs/ceph/metric.c

+1 −0
Original line number Diff line number Diff line
@@ -22,6 +22,7 @@ int ceph_metric_init(struct ceph_client_metric *m) 
	if (ret)

		goto err_d_lease_mis;



	atomic64_set(&m->total_caps, 0);

	ret = percpu_counter_init(&m->i_caps_hit, 0, GFP_KERNEL);

	if (ret)

		goto err_i_caps_hit;

fs/ceph/metric.h

+1 −0
Original line number Diff line number Diff line
@@ -12,6 +12,7 @@ struct ceph_client_metric { 
	struct percpu_counter d_lease_hit;

	struct percpu_counter d_lease_mis;



	atomic64_t            total_caps;

	struct percpu_counter i_caps_hit;

	struct percpu_counter i_caps_mis;

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