Compiling libjvm.so as PIC

[Matthias Klose]

Omair Majid schrieb:
> Ionana and I have been trying to get icedtea to work when built as a
> normal user with SELinux enabled. SELinux stops java from loading
> libjvm.so which is built as non-PIC. Please see
> http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6538311 for more
> information.
> 
> The bug report states that building libjvm.so as PIC has performance
> penalties. Ioana and I have been comparing the performance of a JVM
> built as PIC with one built as non-PIC for the last few days. For the
> JVM built as PIC, the fastest run was about 3% faster than the slowest.
> For the JVM built as non-PIC, the fastest run was about 1% faster than
> the slowest. Comparing the average performance, the PIC JVM seems to be
> faster by 0.59% which indicates that any difference in performance is
> negligible.
> 
> Building libjmv.so as PIC should also result in memory savings as the
> code segment will be shared across processes.
> 
> The attached patch will build libjvm.so as PIC. Any objections to
> applying it?

does it make a difference with SELinux disabled?