Only debugfs uses this list. By omitting it, we save some memory and
reduce lock contention on `caps_list_lock`.
Signed-off-by: Max Kellermann <max.kellermann@xxxxxxxxx>
---
fs/ceph/caps.c | 6 ++++++
fs/ceph/mds_client.c | 2 ++
fs/ceph/mds_client.h | 6 ++++++
3 files changed, 14 insertions(+)
diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c
index c4941ba245ac..772879aa26ee 100644
--- a/fs/ceph/caps.c
+++ b/fs/ceph/caps.c
@@ -3067,10 +3067,13 @@ int __ceph_get_caps(struct inode *inode, struct ceph_file_info *fi, int need,
flags, &_got);
WARN_ON_ONCE(ret == -EAGAIN);
if (!ret) {
+#ifdef CONFIG_DEBUG_FS
struct ceph_mds_client *mdsc = fsc->mdsc;
struct cap_wait cw;
+#endif
DEFINE_WAIT_FUNC(wait, woken_wake_function);
+#ifdef CONFIG_DEBUG_FS
cw.ino = ceph_ino(inode);
cw.tgid = current->tgid;
cw.need = need;
@@ -3079,6 +3082,7 @@ int __ceph_get_caps(struct inode *inode, struct ceph_file_info *fi, int need,
spin_lock(&mdsc->caps_list_lock);
list_add(&cw.list, &mdsc->cap_wait_list);
spin_unlock(&mdsc->caps_list_lock);
+#endif // CONFIG_DEBUG_FS
/* make sure used fmode not timeout */
ceph_get_fmode(ci, flags, FMODE_WAIT_BIAS);
@@ -3097,9 +3101,11 @@ int __ceph_get_caps(struct inode *inode, struct ceph_file_info *fi, int need,
remove_wait_queue(&ci->i_cap_wq, &wait);
ceph_put_fmode(ci, flags, FMODE_WAIT_BIAS);
+#ifdef CONFIG_DEBUG_FS
spin_lock(&mdsc->caps_list_lock);
list_del(&cw.list);
spin_unlock(&mdsc->caps_list_lock);
+#endif
if (ret == -EAGAIN)
continue;
diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c
index c2157f6e0c69..62238f3e6e19 100644
--- a/fs/ceph/mds_client.c
+++ b/fs/ceph/mds_client.c
@@ -5505,7 +5505,9 @@ int ceph_mdsc_init(struct ceph_fs_client *fsc)
INIT_DELAYED_WORK(&mdsc->delayed_work, delayed_work);
mdsc->last_renew_caps = jiffies;
INIT_LIST_HEAD(&mdsc->cap_delay_list);
+#ifdef CONFIG_DEBUG_FS
INIT_LIST_HEAD(&mdsc->cap_wait_list);
+#endif
spin_lock_init(&mdsc->cap_delay_lock);
INIT_LIST_HEAD(&mdsc->cap_unlink_delay_list);
INIT_LIST_HEAD(&mdsc->snap_flush_list);
diff --git a/fs/ceph/mds_client.h b/fs/ceph/mds_client.h
index cfa18cf915a0..13dd83f783ec 100644
--- a/fs/ceph/mds_client.h
+++ b/fs/ceph/mds_client.h
@@ -416,6 +416,8 @@ struct ceph_quotarealm_inode {
struct inode *inode;
};
+#ifdef CONFIG_DEBUG_FS
+
struct cap_wait {
struct list_head list;
u64 ino;
@@ -424,6 +426,8 @@ struct cap_wait {
int want;
};
+#endif // CONFIG_DEBUG_FS
+
enum {
CEPH_MDSC_STOPPING_BEGIN = 1,
CEPH_MDSC_STOPPING_FLUSHING = 2,
@@ -512,7 +516,9 @@ struct ceph_mds_client {
spinlock_t caps_list_lock;
struct list_head caps_list; /* unused (reserved or
unreserved) */
+#ifdef CONFIG_DEBUG_FS
struct list_head cap_wait_list;
+#endif
int caps_total_count; /* total caps allocated */
int caps_use_count; /* in use */
int caps_use_max; /* max used caps */
