Ceph

Hi!
when i test the rados suites by zhe newest version of the master branch, there are so many core dump and the osd cann't up.

the log list:
2016-07-15T10:42:17.667 INFO:tasks.ceph.mon.c.plana142.stderr:*** Caught signal (Segmentation fault)
2016-07-15T10:42:17.668 INFO:tasks.ceph.mon.c.plana142.stderr: in thread 7faa84d7b700 thread_name:ms_async_worker
2016-07-15T10:42:17.670 INFO:tasks.ceph.mon.c.plana142.stderr: ceph version v11.0.0-613-g88f3292 (88f32923c7ac29f544ee33c33163ae9c85c9e525)
2016-07-15T10:42:17.671 INFO:tasks.ceph.mon.c.plana142.stderr: 1: (ceph::BackTrace::BackTrace(int)+0x2d) [0x135ef6b]
2016-07-15T10:42:17.671 INFO:tasks.ceph.mon.c.plana142.stderr: 2: ceph-mon() [0x16479f3]
2016-07-15T10:42:17.671 INFO:tasks.ceph.mon.c.plana142.stderr: 3: (()+0x10340) [0x7faa8afb2340]
2016-07-15T10:42:17.671 INFO:tasks.ceph.mon.c.plana142.stderr: 4: [0x7faa8cd281c8]
2016-07-15T10:42:17.672 INFO:tasks.ceph.mon.c.plana142.stderr:2016-07-15 10:42:17.669022 7faa84d7b700 -1 Caught signal (Segmentation fault)
2016-07-15T10:42:17.672 INFO:tasks.ceph.mon.c.plana142.stderr: in thread 7faa84d7b700 thread_name:ms_async_worker
2016-07-15T10:42:17.672 INFO:tasks.ceph.mon.c.plana142.stderr:
2016-07-15T10:42:17.672 INFO:tasks.ceph.mon.c.plana142.stderr: ceph version v11.0.0-613-g88f3292 (88f32923c7ac29f544ee33c33163ae9c85c9e525)
2016-07-15T10:42:17.673 INFO:tasks.ceph.mon.c.plana142.stderr: 1: (ceph::BackTrace::BackTrace(int)+0x2d) [0x135ef6b]
2016-07-15T10:42:17.673 INFO:tasks.ceph.mon.c.plana142.stderr: 2: ceph-mon() [0x16479f3]
2016-07-15T10:42:17.673 INFO:tasks.ceph.mon.c.plana142.stderr: 3: (()+0x10340) [0x7faa8afb2340]
2016-07-15T10:42:17.673 INFO:tasks.ceph.mon.c.plana142.stderr: 4: [0x7faa8cd281c8]
2016-07-15T10:42:17.674 INFO:tasks.ceph.mon.c.plana142.stderr: NOTE: a copy of the executable, or `objdump -rdS <executable>` is needed to interpret this.
2016-07-15T10:42:17.674 INFO:tasks.ceph.mon.c.plana142.stderr:
2016-07-15T10:42:17.674 INFO:tasks.ceph.mon.c.plana142.stderr: -105> 2016-07-15 10:42:17.547711 7faa8cd014c0 -1 WARNING: the following dangerous and experimental features are enabled: *
2016-07-15T10:42:17.674 INFO:tasks.ceph.mon.c.plana142.stderr: -104> 2016-07-15 10:42:17.547927 7faa8cd014c0 -1 WARNING: the following dangerous and experimental features are enabled: *
2016-07-15T10:42:17.675 INFO:tasks.ceph.mon.c.plana142.stderr: -102> 2016-07-15 10:42:17.550033 7faa8cd014c0 -1 WARNING: the following dangerous and experimental features are enabled: *
2016-07-15T10:42:17.675 INFO:tasks.ceph.mon.b.plana148.stdout:starting mon.b rank 1 at 192.168.34.148:6789/0 mon_data /var/lib/ceph/mon/ceph-b fsid 01564858-7e3a-40eb-9142-b8b186518716
2016-07-15T10:42:17.676 INFO:tasks.ceph.mon.c.plana142.stderr: -1> 2016-07-15 10:42:17.669022 7faa84d7b700 -1 * Caught signal (Segmentation fault) *
2016-07-15T10:42:17.676 INFO:tasks.ceph.mon.c.plana142.stderr: in thread 7faa84d7b700 thread_name:ms_async_worker
2016-07-15T10:42:17.676 INFO:tasks.ceph.mon.c.plana142.stderr:
2016-07-15T10:42:17.677 INFO:tasks.ceph.mon.c.plana142.stderr: ceph version v11.0.0-613-g88f3292 (88f32923c7ac29f544ee33c33163ae9c85c9e525)
2016-07-15T10:42:17.677 INFO:tasks.ceph.mon.c.plana142.stderr: 1: (ceph::BackTrace::BackTrace(int)+0x2d) [0x135ef6b]
2016-07-15T10:42:17.677 INFO:tasks.ceph.mon.c.plana142.stderr: 2: ceph-mon() [0x16479f3]
2016-07-15T10:42:17.677 INFO:tasks.ceph.mon.c.plana142.stderr: 3: (()+0x10340) [0x7faa8afb2340]
2016-07-15T10:42:17.677 INFO:tasks.ceph.mon.c.plana142.stderr: 4: [0x7faa8cd281c8]
2016-07-15T10:42:17.678 INFO:tasks.ceph.mon.c.plana142.stderr: NOTE: a copy of the executable, or `objdump -rdS <executable>` is needed to interpret this.
2016-07-15T10:42:17.678 INFO:tasks.ceph.mon.c.plana142.stderr:
2016-07-15T10:42:17.678 INFO:tasks.ceph.mon.a.plana142.stdout:starting mon.a rank 0 at 192.168.34.142:6789/0 mon_data /var/lib/ceph/mon/ceph-a fsid 01564858-7e3a-40eb-9142-b8b186518716