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authorXiubo Li <xiubli@redhat.com>2020-06-30 03:52:16 -0400
committerIlya Dryomov <idryomov@gmail.com>2020-08-03 11:05:15 +0200
commit4f1d756def68588b88068af1d5a4a3b6dc7e6e2a (patch)
treeedfa235e919db5e27474367a2d7ea5e69a367086 /fs/ceph
parent3e699bd865527004773012da38febdf444fd5fa8 (diff)
downloadlinux-4f1d756def68588b88068af1d5a4a3b6dc7e6e2a.tar.bz2
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: Xiubo Li <xiubli@redhat.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Diffstat (limited to 'fs/ceph')
-rw-r--r--fs/ceph/caps.c2
-rw-r--r--fs/ceph/debugfs.c14
-rw-r--r--fs/ceph/mds_client.c1
-rw-r--r--fs/ceph/metric.c1
-rw-r--r--fs/ceph/metric.h1
5 files changed, 7 insertions, 12 deletions
diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c
index 972c13aa4225..5f4894063a73 100644
--- a/fs/ceph/caps.c
+++ b/fs/ceph/caps.c
@@ -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;
}
diff --git a/fs/ceph/debugfs.c b/fs/ceph/debugfs.c
index 070ed8481340..3030f5585085 100644
--- a/fs/ceph/debugfs.c
+++ b/fs/ceph/debugfs.c
@@ -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));
diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c
index 58c54d41aa40..f3c71230df93 100644
--- a/fs/ceph/mds_client.c
+++ b/fs/ceph/mds_client.c
@@ -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
diff --git a/fs/ceph/metric.c b/fs/ceph/metric.c
index 9217f35bc2b9..269eacbd2a15 100644
--- a/fs/ceph/metric.c
+++ b/fs/ceph/metric.c
@@ -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;
diff --git a/fs/ceph/metric.h b/fs/ceph/metric.h
index ccd81285a450..23a3373d5a3d 100644
--- a/fs/ceph/metric.h
+++ b/fs/ceph/metric.h
@@ -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;