Ceph » CephFS

[3]kdb> bt
Stack traceback for pid 22981
0xffff88020b6b0000    22981    21259  1    3   R  0xffff88020b6b0488 *ffsb
 ffff8802117c9938 0000000000000018 ffffffffa08cdd19 ffffea00078c6080
 ffffea00078c6080 ffff8802117c9998 ffffffff8113e187 ffff880200000024
 ffff8801ffffffff ffff880200000001 ffffea0000000001 ffff88019f96a440
Call Trace:
 [<ffffffffa08cdd19>] ? ceph_put_wrbuffer_cap_refs+0x39/0x360 [ceph]
 [<ffffffff8113e187>] ? test_clear_page_writeback+0x87/0x190
 [<ffffffffa08c74d3>] ? writepage_nounlock+0x243/0x3d0 [ceph]
 [<ffffffffa08c77b0>] ? ceph_update_writeable_page+0x150/0x4b0 [ceph]
 [<ffffffff81132581>] ? grab_cache_page_write_begin+0xa1/0xe0
 [<ffffffffa08c7b7c>] ? ceph_write_begin+0x6c/0xc0 [ceph]
 [<ffffffff81131e5a>] ? generic_file_buffered_write+0x11a/0x290
 [<ffffffffa08c4160>] ? ceph_aio_write+0x8f0/0xa90 [ceph]
 [<ffffffff81186203>] ? do_sync_write+0xa3/0xe0
 [<ffffffff811868f3>] ? vfs_write+0xb3/0x180
 [<ffffffff81186d95>] ? sys_write+0x55/0xa0
 [<ffffffff8167b559>] ? system_call_fastpath+0x16/0x1b

job was

kernel:
  kdb: true
  sha1: b5b09be30cf99f9c699e825629f02e3bce555d44
machine_type: plana
nuke-on-error: true
overrides:
  ceph:
    conf:
      mon:
        debug mon: 20
        debug ms: 20
        debug paxos: 20
      osd:
        filestore flush min: 0
        osd op thread timeout: 60
    fs: btrfs
    log-whitelist:
    - slow request
    sha1: fd901056831586e8135e28c8f4ba9c2ec44dfcf6
  s3tests:
    branch: next
  workunit:
    sha1: fd901056831586e8135e28c8f4ba9c2ec44dfcf6
roles:
- - mon.a
  - mon.c
  - osd.0
  - osd.1
  - osd.2
- - mon.b
  - mds.a
  - osd.3
  - osd.4
  - osd.5
- - client.0
tasks:
- chef: null
- clock.check: null
- install: null
- ceph:
    log-whitelist:
    - wrongly marked me down
    - objects unfound and apparently lost
- thrashosds: null
- kclient: null
- workunit:
    clients:
      all:
      - suites/ffsb.sh

have seen this several times in the last month or so.