Hi all, Currently it is not allowed to issue an evict op (CEPH_OSD_OP_CACHE_EVICT) on an object which has watchers (e.g. the rbd header). EBUSY is returned in this case. This leads to the the flush-evict-all failure during removing a cache tier, something like below: rbd_header.4fc06b8b4567 failed to evict /rbd_header.4fc06b8b4567: (16) Device or resource busy My question is that do we actually need to do so? The object in the base pool should have the watcher information as well after the flush. Probably we could remove this 'watcher' check to make flush-evict-all happy? -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
