Cited from Wikipedia *To apply a patch, Ksplice first freezes execution of a computer so it is the only program running. The system verifies that no processors<http://en.wikipedia.org/wiki/Central_Processing_Unit> were in the middle of executing functions that will be modified by the patch. Ksplice modifies the beginning of changed functions so that they instead point to new, updated versions of those functions, and modifies data and structures in memory that need to be changed. Finally, Ksplice resumes each processor running where it left off.
*The bold text yields that only certain set of kernel patches are applicable with Ksplice?[?]
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