Re: [dm-crypt] system freezes when using swap that is encrypted

[Arno Wagner <arno@wagner.name>]

On Fri, Nov 12, 2010 at 08:40:43PM -0700, Nicolas Bock wrote:
> I think I have ruled out now that this is a hard crash. I have 8GB of
> physical memory and another 8GB as swap. I allocated 10GB in a C
> program and after it had written to about  7GB or so, the system
> froze. But after maybe 20 minutes the system got unstuck and had
> killed the job. Since I am on amd64, I am not sure why the job got
> killed, it should certainly have had enough memory to write to. 

I don't know what criteria lead to activation of the OOM killer,
but I use one application that allocates up to 150 MB of memory,
but never uses (accesses) it. This app runs fine in a qemu
with 16MB RAM and 200MB swap. It is possible that your process
gets killed, if it uses more memory than the larger of swap 
and main memory.

Arno


-- 
Arno Wagner, Dr. sc. techn., Dipl. Inform., CISSP -- Email: arno@wagner.name 
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