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After running ceph on XFS for some time, I decided to try btrfs again. Performance with the current "for-linux-min" branch and big metadata is much better. The only problem (?) I''m still seeing is a warning that seems to occur from time to time: [87703.784552] ------------[ cut here ]------------ [87703.789759] WARNING: at fs/btrfs/inode.c:2103

[Note: This message has also been sent to ceph-devel@vger.kernel.org & puppet-openstack@puppetlabs.com] Hi, I''m currently working on writing a Puppet module for Ceph. As after some research I found no existing module, I''ll start from scratch but I would be glad to hear from people who would already have started working or this or having any idea or pointers regarding this

We''ve been seeing warnings coming out of the orphan commit stuff forever from ceph. Turns out it''s because we''re racing with checking if the orphan block reserve is set, because we clear it outside of the spin_lock. So leave the normal fastpath checks where they are, but take the spin_lock and _recheck_ to make sure we haven''t had an orphan block rsv added in