[Lustre-devel] Hangs with cgroup memory controller
Mark.Hills at framestore.com
Wed Jul 27 09:21:52 PDT 2011
We are unable to use the combination of Lustre and the cgroup memory
controller, because of intermittent hangs when trying to close the cgroup.
In a thread on LKML  we diagnosed that the problem was a leak of page
accounting or resources.
Memory pages are charged to the cgroup, but the cgroup is unable to
un-charge them, and so it spins. It suggests that, perhaps, at least one
page gets allocated but not placed in the LRU.
Using the NFS client, via a gateway, has never shown this problem.
I'm in the client code, but I really need some pointers. And disadvantaged
by being unable to find a reproducable test case. Any ideas?
Our system is Lustre 1.8.6 server, with clients on Linux 2.6.32 and Lustre
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