Comment 485 for bug 500069
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35a32c5
(Get the code!)
My system also locks up when it tries to access swap. This is on Ubuntu Jaunty with both the Ubuntu 2.6.28 kernel and Ubuntu's vanilla 2.6.30.rc3 kernel. This machine has 4GB of RAM and 4GB of swap and is running on a root ext4 partition.
My test case is to run multiple VirtualBox VMs (eg Jaunty installations) with say 1.4GB of RAM assigned to each. When I run the third one, as soon as the kernel starts to hit swap, it thrashes the hard drive, X rapidly becomes unresponsive and I have to hard reset the the machine. I am able to move the mouse (slowly) but clicking on individual windows doesn't work and the keyboard doesn't respond. atop -d manages to update itself as far as about 300MB of swap use and then stops updating.
I've left it as long as 15 minutes to see if it will recover, but it doesn't.