Hi guys, I just checked out the code on 12.2.8. I found that Client::open() (other functions have same problem) will hold a global lock at the beginning and will release it at the end. Suppose that Client::path_walk() will check a file which has n layers folder path, it will send n requests to server and wait for feedback. During that time, it will hold the global lock. Is it a performance issue and is there any plan to fix this issue? I also checked the code on cephfs kernel driver, the ceph_mdsc_do_request() will also hold a global lock, but it will release the lock when it wait. So it seems it's better than libcephfs. Thanks, Marvin Zhang
