Hi Ingo and Peter,
A known shortcoming of the current lockdep implementation is that it requires
lock keys to be allocated statically and that this key sharing can cause false
positive deadlock reports. This patch series adds support for dynamic keys in
the lockdep code. I'm not claiming that this patch series is perfect. However,
the code in this patch series survives nontrivial tests so I think it's worth
a look. Two unrelated changes in this patch series are:
- Improve the lockdep tests.
- Complain if no name has been assigned to a lock object.
Thanks,
Bart.
Bart Van Assche (27):
lockdep tests: Display compiler warning and error messages
lockdep tests: Fix shellcheck warnings
lockdep tests: Improve testing accuracy
lockdep tests: Run lockdep tests a second time under Valgrind
liblockdep: Rename "trywlock" into "trywrlock"
liblockdep: Add dummy print_irqtrace_events() implementation
lockdep tests: Test the lockdep_reset_lock() implementation
locking/lockdep: Declare local symbols static
locking/lockdep: Inline __lockdep_init_map()
locking/lockdep: Introduce lock_class_cache_is_registered()
timekeeping: Assign a name to tk_core.seq.dep_map
net/core: Assign a name to devnet_rename_seq.dep_map
locking/lockdep: Complain if a lock object has no name
locking/lockdep: Remove a superfluous INIT_LIST_HEAD() statement
locking/lockdep: Make concurrent lockdep_reset_lock() calls safe
locking/lockdep: Stop using RCU primitives to access all_lock_classes
locking/lockdep: Make zap_class() remove all matching lock order
entries
locking/lockdep: Reorder struct lock_class members
locking/lockdep: Retain the class key and name while freeing a lock
class
locking/lockdep: Free lock classes that are no longer in use
locking/lockdep: Rename lock_list.entry into
lock_list.lock_order_entry
locking/lockdep: Reuse list entries that are no longer in use
locking/lockdep: Check data structure consistency
locking/lockdep: Introduce __lockdep_free_key_range()
locking/lockdep: Add support for dynamic keys
kernel/workqueue: Use dynamic lockdep keys for workqueues
lockdep tests: Test dynamic key registration
include/linux/lockdep.h | 45 +-
include/linux/workqueue.h | 28 +-
kernel/locking/lockdep.c | 640 +++++++++++++++---
kernel/locking/lockdep_proc.c | 2 +-
kernel/time/timekeeping.c | 4 +-
kernel/workqueue.c | 60 +-
net/core/dev.c | 2 +-
tools/lib/lockdep/include/liblockdep/common.h | 3 +
tools/lib/lockdep/include/liblockdep/mutex.h | 12 +-
tools/lib/lockdep/include/liblockdep/rwlock.h | 6 +-
tools/lib/lockdep/lockdep.c | 5 +
tools/lib/lockdep/run_tests.sh | 38 +-
tools/lib/lockdep/tests/AA.sh | 2 +
tools/lib/lockdep/tests/ABA.sh | 2 +
tools/lib/lockdep/tests/ABBA.c | 12 +
tools/lib/lockdep/tests/ABBA.sh | 2 +
tools/lib/lockdep/tests/ABBA_2threads.sh | 2 +
tools/lib/lockdep/tests/ABBCCA.c | 4 +
tools/lib/lockdep/tests/ABBCCA.sh | 2 +
tools/lib/lockdep/tests/ABBCCDDA.c | 5 +
tools/lib/lockdep/tests/ABBCCDDA.sh | 2 +
tools/lib/lockdep/tests/ABCABC.c | 4 +
tools/lib/lockdep/tests/ABCABC.sh | 2 +
tools/lib/lockdep/tests/ABCDBCDA.c | 5 +
tools/lib/lockdep/tests/ABCDBCDA.sh | 2 +
tools/lib/lockdep/tests/ABCDBDDA.c | 5 +
tools/lib/lockdep/tests/ABCDBDDA.sh | 2 +
tools/lib/lockdep/tests/WW.sh | 2 +
tools/lib/lockdep/tests/unlock_balance.c | 2 +
tools/lib/lockdep/tests/unlock_balance.sh | 2 +
30 files changed, 726 insertions(+), 178 deletions(-)
create mode 100755 tools/lib/lockdep/tests/AA.sh
create mode 100755 tools/lib/lockdep/tests/ABA.sh
create mode 100755 tools/lib/lockdep/tests/ABBA.sh
create mode 100755 tools/lib/lockdep/tests/ABBA_2threads.sh
create mode 100755 tools/lib/lockdep/tests/ABBCCA.sh
create mode 100755 tools/lib/lockdep/tests/ABBCCDDA.sh
create mode 100755 tools/lib/lockdep/tests/ABCABC.sh
create mode 100755 tools/lib/lockdep/tests/ABCDBCDA.sh
create mode 100755 tools/lib/lockdep/tests/ABCDBDDA.sh
create mode 100755 tools/lib/lockdep/tests/WW.sh
create mode 100755 tools/lib/lockdep/tests/unlock_balance.sh
--
2.20.0.rc0.387.gc7a69e6b6c-goog
