For what it's worth, a deadlock took one of our production systems running 2.6.26-1-amd64 down last night. We had four backups scheduled to kick off at the same time (probably not a good idea in the first place, eh?). Each backup takes a snapshot of a different logical volume. The endgame was that we could still ssh into the system but the applications were very unstable (I'm guessing this is the high CPU utilization previously reported) and the only way to recover was to reboot.

Phil Turner




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