CONFIG_UNWINDER_ORC

This option enables the ORC (Oops Rewind Capability) unwinder for
unwinding kernel stack traces.  It uses a custom data format which is
a simplified version of the DWARF Call Frame Information standard.

This unwinder is more accurate across interrupt entry frames than the
frame pointer unwinder.  It also enables a 5-10% performance
improvement across the entire kernel compared to frame pointers.

Enabling this option will increase the kernel's runtime memory usage
by roughly 2-4MB, depending on your kernel config.


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