[Openmcl-devel] Linux x86-64 notes

R. Matthew Emerson rme at clozure.com
Fri Dec 9 12:34:36 PST 2011

If you run CCL on Linux/x86-64, you might want to look at

The upshot is that the kernel can fail to restore the
processor's FPU state in certain circumstances, and this
can cause CCL to crash or perhaps produce incorrect
floating-point results.  The problem seems to be more likely
to surface when kernel preemption is enabled.  See the link
above for the gory details.

The moral of the story: please consider using an up-to-date
Linux kernel. It appears that kernel versions 2.6.37 and later
should be OK.

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