Upgraded the btrfs tree to 6-17 and all of the stability problems went
away on the single disk system, so not sure if this was a code problem
or hardware, but at least stable now.
Performance results updated at:
http://btrfs.boxacle.net/repository/single-disk/History/History.html
The fixed to the cow path are obvious for random write, although even on
single disk the CPU overhead is very noticeable as the efficiency graphs
show.
The good news is that now the only workload that Btrfs is not at or near
the top in performance for single disk is MailServer.
Steve
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