Ceph » Linux kernel client

This leads to sync hanging.

relevant log on the client side:

Jun 23 23:54:58 uml kernel: [ 482.100000] ceph: caps.c:1385 : inode 0000000065055270 now flushing seq 5689
Jun 23 23:54:58 uml kernel: [ 482.100000] ceph: caps.c:1096 : __send_cap 0000000065055270 cap 0000000065021bb8 session 000000006ffd4240 pAsxLsXsxFsxcrwb > pAsxLsXsxFsxcrwb (revoking -)
Jun 23 23:54:58 uml kernel: [ 482.100000] ceph: caps.c:1139 : cap_flush_tid 1
Jun 23 23:54:58 uml kernel: [ 482.100000] ceph: caps.c:933 : send_cap_msg update 1cf3 10000000db4 caps pAsxLsXsxFsxcrwb wanted Fcb dirty AxFxw seq 1/1 mseq 0 follows 1 size 3135/3135 xattr_ver 0 xattr_len 0
Jun 23 23:54:58 uml kernel: [ 482.100000] ceph: messenger.c:2002 : ---- 000000006fe5ed68 to mds0 784=client_caps len 176+0+0 -----
...
Jun 23 23:54:59 uml kernel: [ 482.850000] ceph: caps.c:2741 : op import ino 10000000db4.fffffffffffffffe inode 0000000065055270
...
Jun 24 00:00:00 uml kernel: [ 660.450000] ceph: mds_client.c:1211 : check_cap_flush still flushing 0000000065055270 seq 5689 <= 32328 to mds0

log on the mds side:

10.06.23_16:54:58.002410 418aa950 -- 10.0.1.245:6802/7461 <== client4104 10.0.1.202:0/13390511 12304 ==== client_caps(update ino 10000000db4 7411 seq 1 caps=pAsxLsXsxFsxcrwb dirty=AxFxw wanted=Fcb follows 1 size 3135/3135 mtime 10.01.18_10:23:35.000000 tws 2) ==== 176+0+0 (172349719 0 0) 0x7f7554264050
...
10.06.23_16:54:58.632868 418aa950 -- 10.0.1.245:6802/7461 --> 10.0.1.202:0/13390511 -- client_caps(export ino 10000000db4 7411 seq 1 caps=pAsxLsXsxFsxcrwb dirty=- wanted=pAsxXsxFxwb follows 0 size 0/0 mtime 0.000000) v1 -- ?+0 0x2472660