Comment 15 for bug 159356

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Nuno Sucena Almeida (slug-debian) wrote : Re: System freeze on high memory usage

I have this same problem with lucid when using an encrypted swap partition on a 64 bit system.

If a process allocates most of the RAM, the system becomes unresponsive and if within X I have no other option but to force a power cycle.

ctrl+alt+sysrq+f (to invoke the oom killer) doesn't seem to do its job, although the system is not completely frozen, since sysrq still display the help messages (ctrl+alt+sysrq+h) and I see some disk activity.

Trying with a regular swap partition (not encrypted) works fine, so I assume there's some problem with the kcryptd from the linux kernel.