[NOTABUG] Re: [Xen-users] Sun and BEA 1.5 64-bit JVMs not happy w/ Xen on x86_64

[Charles Duffy <cduffy@xxxxxxxxxxx>]

Ian Pratt wrote:
> Please can you give us a recipe for provoking the bug using the sun jvm
> (or better, a little program that just does the mmap).
>
> [or are you saying that just running 'jave -version' a bunch of times
> causes the issue? ]
>   
Running "java -version" causes the issue every time, starting 
immediately after boot.
I just strace'd the Sun JVM, and it appears that the only mmap failing 
is requesting a full 1GB of RAM, and that only inconsequential amounts 
have been allocated hitherto. Looking into this further, I've found 
evidence that there's a bug in Sun's 64-bit JVMs causing them to 
allocate much more memory than is needed:
http://forum.java.sun.com/thread.jspa?threadID=651637

...and, further, that "ulimit -v" isn't being set appropriately on this 
system on account of an administration bug. [Swap was enabled only 
*after* boot, whereas SLES calculates the default ulimit -v as a 
percentage of total ram+swap at boot time].
Oops; sorry for the noise.

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