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authorYan, Zheng <zheng.z.yan@intel.com>2013-09-22 10:15:58 +0800
committerSage Weil <sage@inktank.com>2013-11-23 11:00:59 -0800
commita096b09aeec6ff99edfdfd8cee24d6f25377d585 (patch)
treed32a4a15cd391c2c84205c855e7d997070279cc6 /fs/ceph/caps.c
parent81c6aea5275eae453719d7f3924da07e668265c5 (diff)
downloadop-kernel-dev-a096b09aeec6ff99edfdfd8cee24d6f25377d585.zip
op-kernel-dev-a096b09aeec6ff99edfdfd8cee24d6f25377d585.tar.gz
ceph: queue cap release in __ceph_remove_cap()
call __queue_cap_release() in __ceph_remove_cap(), this avoids acquiring s_cap_lock twice. Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com> Reviewed-by: Sage Weil <sage@inktank.com>
Diffstat (limited to 'fs/ceph/caps.c')
-rw-r--r--fs/ceph/caps.c21
1 files changed, 11 insertions, 10 deletions
diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c
index 13976c3..d2d6e40 100644
--- a/fs/ceph/caps.c
+++ b/fs/ceph/caps.c
@@ -897,7 +897,7 @@ static int __ceph_is_any_caps(struct ceph_inode_info *ci)
* caller should hold i_ceph_lock.
* caller will not hold session s_mutex if called from destroy_inode.
*/
-void __ceph_remove_cap(struct ceph_cap *cap)
+void __ceph_remove_cap(struct ceph_cap *cap, bool queue_release)
{
struct ceph_mds_session *session = cap->session;
struct ceph_inode_info *ci = cap->ci;
@@ -909,6 +909,10 @@ void __ceph_remove_cap(struct ceph_cap *cap)
/* remove from session list */
spin_lock(&session->s_cap_lock);
+ if (queue_release)
+ __queue_cap_release(session, ci->i_vino.ino, cap->cap_id,
+ cap->mseq, cap->issue_seq);
+
if (session->s_cap_iterator == cap) {
/* not yet, we are iterating over this very cap */
dout("__ceph_remove_cap delaying %p removal from session %p\n",
@@ -1023,7 +1027,6 @@ void __queue_cap_release(struct ceph_mds_session *session,
struct ceph_mds_cap_release *head;
struct ceph_mds_cap_item *item;
- spin_lock(&session->s_cap_lock);
BUG_ON(!session->s_num_cap_releases);
msg = list_first_entry(&session->s_cap_releases,
struct ceph_msg, list_head);
@@ -1052,7 +1055,6 @@ void __queue_cap_release(struct ceph_mds_session *session,
(int)CEPH_CAPS_PER_RELEASE,
(int)msg->front.iov_len);
}
- spin_unlock(&session->s_cap_lock);
}
/*
@@ -1067,12 +1069,8 @@ void ceph_queue_caps_release(struct inode *inode)
p = rb_first(&ci->i_caps);
while (p) {
struct ceph_cap *cap = rb_entry(p, struct ceph_cap, ci_node);
- struct ceph_mds_session *session = cap->session;
-
- __queue_cap_release(session, ceph_ino(inode), cap->cap_id,
- cap->mseq, cap->issue_seq);
p = rb_next(p);
- __ceph_remove_cap(cap);
+ __ceph_remove_cap(cap, true);
}
}
@@ -2791,7 +2789,7 @@ static void handle_cap_export(struct inode *inode, struct ceph_mds_caps *ex,
}
spin_unlock(&mdsc->cap_dirty_lock);
}
- __ceph_remove_cap(cap);
+ __ceph_remove_cap(cap, false);
}
/* else, we already released it */
@@ -2931,9 +2929,12 @@ void ceph_handle_caps(struct ceph_mds_session *session,
if (!inode) {
dout(" i don't have ino %llx\n", vino.ino);
- if (op == CEPH_CAP_OP_IMPORT)
+ if (op == CEPH_CAP_OP_IMPORT) {
+ spin_lock(&session->s_cap_lock);
__queue_cap_release(session, vino.ino, cap_id,
mseq, seq);
+ spin_unlock(&session->s_cap_lock);
+ }
goto flush_cap_releases;
}
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