Ceph » CephFS

I discovered this while trying to reproduce the issue
in http://tracker.ceph.com/issues/4706.

I documented it there, but I'm pretty sure it's a
quite different problem from that one.Specifically what I'm doing:

Here's how to reproduce it:

machine 1
---------
hostname > /mnt/ceph/foo
cat /mnt/ceph/foo
(shows hostname)
                         machine 2
                         ---------
                         cat /mnt/ceph/foo
                         (shows machine 1 hostname)
                         hostname > /mnt/ceph/foo
                         cat /mnt/ceph/foo
                         (shows machine 2 hostname,
                          then hangs)
cat /mnt/ceph/foo
(no output, hangs)

I got this running this for ceph-client (current "testing"):
51122dd libceph: make method call data be a separate data item

and this for ceph (the current "bobtail" branch) (or close):
daa6ed2 Merge pull request #210 from dalgaaf/wip-da-bobtail-pybind

I have tested the commands listed above on a system with the
patches described here:
http://tracker.ceph.com/issues/4679

I no longer see the hang.

This issue can be marked resolves as soon as those are committed.
Assigning this to myself as a reminder to do this.

The following have been committed to the "testing" branch
of the ceph-client git repository. With them in place
I no longer see this hang.

625d6ec ceph: fix race between writepages and truncate
8bc726f ceph: apply write checks in ceph_aio_write
e7a4c3e ceph: take i_mutex before getting Fw cap