From: Xiubo Li <xiubli@xxxxxxxxxx> Changed in V2: - do not check the caps when reconnecting to mds - switch ceph_async_check_caps() to ceph_async_put_cap_refs() Changed in V3: - fix putting the cap refs leak By adding the put_cap_refs's queue work we can avoid the 'mdsc->mutex' and 'session->s_mutex' double lock issue and also the dead lock issue of them. There at least 10+ places have the above issues and most of them are caused by calling the ceph_mdsc_put_request() when releasing the 'req'. Xiubo Li (2): ceph: add ceph_async_put_cap_refs to avoid double lock and deadlock ceph: do not check the caps when reconnecting to mds fs/ceph/caps.c | 98 +++++++++++++++++++++++++++++++++++++++++++++------- fs/ceph/dir.c | 2 +- fs/ceph/file.c | 2 +- fs/ceph/inode.c | 3 ++ fs/ceph/mds_client.c | 14 +++++--- fs/ceph/mds_client.h | 3 +- fs/ceph/super.h | 7 ++++ 7 files changed, 110 insertions(+), 19 deletions(-) -- 1.8.3.1
