Year: 2018
Type: conference-paper
Abstract: Read-Copy Update (RCU) is a scalable, high-performance Linux-kernel synchronization mechanism that runs low-overhead readers concurrently with updaters. Production-quality RCU implementations are decidedly non-trivial and their stringent validation is mandatory. This suggests use of formal verification. Previous formal verification efforts for RCU either focus on simple implementations or use modeling languages. In this paper, we construct a model directly from the source code of Tree RCU in the Linux kernel, and use the CBMC program analyzer to verify its safety and liveness properties. To the best of our knowledge, this is the first verification of a significant part of RCU's source code - an important step towards integration of formal verification into the Linux kernel's regression test suite.
Authors: Lihao Liang, Paul E. McKenney, Daniel Kroening, Tom Melham
Institutions: University of Oxford, IBM (United States)
Language: English
Subfield: Computational Theory and Mathematics
Field: Computer Science
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2531616995