Hi,
I just saw a kernel crash on one of my machines. It had the cephfs from the
ceph cluster mounted using the in-kernel client:
[522247.751071] [<ffffffff814d3383>] ? release_sock+0xe3/0x110
[522247.751182] [<ffffffff815ea438>] __bad_area_nosemaphore+0x1d1/0x1f0
[522247.751290] [<ffffffff815ea46a>] bad_area_nosemaphore+0x13/0x15
[522247.751397] [<ffffffff815f7b76>] do_page_fault+0x416/0x4f0
[522247.751503] [<ffffffff814ce5dd>] ? sock_recvmsg+0x11d/0x140
[522247.751611] [<ffffffff812c0ea6>] ? cpumask_next_and+0x36/0x50
[522247.751718] [<ffffffff815f4475>] page_fault+0x25/0x30
[522247.751828] [<ffffffffa03ccba4>] ? ceph_x_destroy_authorizer+0x14/0x40
[libceph]
[522247.751995] [<ffffffffa040f9be>] get_authorizer+0x6e/0x140 [ceph]
[522247.752104] [<ffffffff814ce646>] ? kernel_recvmsg+0x46/0x60
[522247.752213] [<ffffffffa03b969a>] prepare_write_connect+0x17a/0x270
[libceph]
[522247.752378] [<ffffffffa03bba75>] con_work+0x755/0x2c40 [libceph]
[522247.752486] [<ffffffff810876a3>] ? update_rq_clock+0x43/0x1b0
[522247.752598] [<ffffffffa03bb320>] ? ceph_msg_new+0x2d0/0x2d0 [libceph]
[522247.752707] [<ffffffff810747ae>] process_one_work+0x11e/0x470
[522247.752815] [<ffffffff810755bf>] worker_thread+0x15f/0x360
[522247.752925] [<ffffffff81075460>] ? manage_workers+0x230/0x230
[522247.753032] [<ffffffff81079da3>] kthread+0x93/0xa0
[522247.753137] [<ffffffff815fd2a4>] kernel_thread_helper+0x4/0x10
[522247.753245] [<ffffffff81079d10>] ?
kthread_freezable_should_stop+0x70/0x70
[522247.753355] [<ffffffff815fd2a0>] ? gs_change+0x13/0x13
[522247.753459] ---[ end trace b9ba686594d99f89 ]---
These lines are all that I could still read on the screen. (Good thing there's
Opens Source OCR programs out there...) I do not know how to extract more
information about that crash (scrolling up does not work), but I'm leaving the
machine like that over night in case someone can tell me.
Kernel version was 3.3.6-3.fc16.x86_64, Ceph cluster is version 0.47.2. The
crash happened after I issued an rbd command. Another thing that might be
related is that I stopped and restarted the entire cluster twice since
mounting the cephfs. The first time, I disabled cephx, the second time I
enabled it again.
Regards,
Guido
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