From: Jeff Layton Date: Thu, 19 Mar 2020 16:00:16 +0000 (-0400) Subject: ceph: don't take i_ceph_lock in handle_cap_import X-Git-Tag: v5.10.7~2392^2~20 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=7833323363233c75fd8d10b5ceefbb9515cb3e32;p=platform%2Fkernel%2Flinux-rpi.git ceph: don't take i_ceph_lock in handle_cap_import Just take it before calling it. This means we have to do a couple of minor in-memory operations under the spinlock now, but those shouldn't be an issue. Signed-off-by: Jeff Layton Signed-off-by: Ilya Dryomov --- diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c index 34aa9f4..f135660 100644 --- a/fs/ceph/caps.c +++ b/fs/ceph/caps.c @@ -3805,7 +3805,6 @@ static void handle_cap_import(struct ceph_mds_client *mdsc, struct ceph_mds_cap_peer *ph, struct ceph_mds_session *session, struct ceph_cap **target_cap, int *old_issued) - __acquires(ci->i_ceph_lock) { struct ceph_inode_info *ci = ceph_inode(inode); struct ceph_cap *cap, *ocap, *new_cap = NULL; @@ -3830,14 +3829,13 @@ static void handle_cap_import(struct ceph_mds_client *mdsc, dout("handle_cap_import inode %p ci %p mds%d mseq %d peer %d\n", inode, ci, mds, mseq, peer); - retry: - spin_lock(&ci->i_ceph_lock); cap = __get_cap_for_mds(ci, mds); if (!cap) { if (!new_cap) { spin_unlock(&ci->i_ceph_lock); new_cap = ceph_get_cap(mdsc, NULL); + spin_lock(&ci->i_ceph_lock); goto retry; } cap = new_cap; @@ -4051,6 +4049,7 @@ void ceph_handle_caps(struct ceph_mds_session *session, } else { down_read(&mdsc->snap_rwsem); } + spin_lock(&ci->i_ceph_lock); handle_cap_import(mdsc, inode, h, peer, session, &cap, &extra_info.issued); handle_cap_grant(inode, session, cap,