https://github.com/torvalds/linux
- HEAD
- refs/heads/arm64-uaccess
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/certifi-2024.7.4
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/idna-3.7
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/requests-2.32.2
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/setuptools-70.0.0
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/urllib3-2.2.2
- refs/heads/master
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Tip revision: df0cc57e057f18e44dac8e6c18aba47ab53202f9 authored by Linus Torvalds on 09 January 2022, 22:55:34 UTC
Linux 5.16
Linux 5.16
Tip revision: df0cc57
README
============
LITMUS TESTS
============
Each subdirectory contains litmus tests that are typical to describe the
semantics of respective kernel APIs.
For more information about how to "run" a litmus test or how to generate
a kernel test module based on a litmus test, please see
tools/memory-model/README.
atomic (/atomic derectory)
--------------------------
Atomic-RMW+mb__after_atomic-is-stronger-than-acquire.litmus
Test that an atomic RMW followed by a smp_mb__after_atomic() is
stronger than a normal acquire: both the read and write parts of
the RMW are ordered before the subsequential memory accesses.
Atomic-RMW-ops-are-atomic-WRT-atomic_set.litmus
Test that atomic_set() cannot break the atomicity of atomic RMWs.
NOTE: Require herd7 7.56 or later which supports "(void)expr".
RCU (/rcu directory)
--------------------
MP+onceassign+derefonce.litmus (under tools/memory-model/litmus-tests/)
Demonstrates the use of rcu_assign_pointer() and rcu_dereference() to
ensure that an RCU reader will not see pre-initialization garbage.
RCU+sync+read.litmus
RCU+sync+free.litmus
Both the above litmus tests demonstrate the RCU grace period guarantee
that an RCU read-side critical section can never span a grace period.