Hi,

this is still an issue for me.

When using no swap partition, this could be related to
Ubuntu Bug #159356, or to the following kernel bug:
http://groups.google.com/group/linux.kernel/browse_thread/thread/910c08e97eb0357e

But I still have the problem when using a swap partition. The system
becomes extremely unresponsive, i.e. processes are influenced which
don't even wait for harddisk i/o. Even the mouse pointer stalls when the
swap area is used. Using cryptographic swap (via the kernel-based
dm-crypt) further worsens the situation.

I've written a small C++ utility that allocates memory to simulate the
behaviour of an application requesting memory.

This file can be compiled with
"g++ memory_overcommit.cc -o memory_overcommit.bin" and run with
"./memory_overcommit.bin".

You could run a tool like "top" in another shell to watch the memory
usage and eventually terminate the process.


** Attachment added: "memory_overcommit.cc"
   http://launchpadlibrarian.net/23232266/memory_overcommit.cc

-- 
Whole system lock-up because of crashing application
https://bugs.launchpad.net/bugs/283420
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