Hi Peter and Ingo,
Historically, the read-write locks (recursive-read locks included) are not
well supported in lockdep. This patchset attempts to solve this problem
sound and complete.
The bulk of the algorithm is in patch #10, which is actually not complex at
all. Hopefully, it simply works.
Now that we have read-write locks suppported, we have all the 262 cases
passed, though I have to flip some cases which, I think, are wrong.
P.S. To Boqun, I haven't got time to read your patchset except that I did
carefully read your design doc and learnt from it a lot. It is helpful.
Please give this patchset at least a look.
Thanks,
Yuyang
--
Yuyang Du (17):
locking/lockdep: Add lock type enum to explicitly specify read or
write locks
locking/lockdep: Add read-write type for dependency
locking/lockdep: Add helper functions to operate on the searched path
locking/lockdep: Update direct dependency's read-write type if it
exists
locking/lockdep: Rename deadlock check functions
locking/lockdep: Adjust BFS algorithm to support multiple matches
locking/lockdep: Introduce mark_lock_unaccessed()
locking/lockdep: Introduce chain_hlocks_type for held lock's
read-write type
locking/lockdep: Hash held lock's read-write type into chain key
locking/lockdep: Support read-write lock's deadlock detection
locking/lockdep: Adjust lockdep selftest cases
locking/lockdep: Remove useless lock type assignment
locking/lockdep: Add nest lock type
locking/lockdep: Support recursive read locks
locking/lockdep: Adjust selftest case for recursive read lock
locking/lockdep: Add more lockdep selftest cases
locking/lockdep: Remove irq-safe to irq-unsafe read check
include/linux/lockdep.h | 40 +-
kernel/locking/lockdep.c | 454 +++++++++++----
kernel/locking/lockdep_internals.h | 4 +
lib/locking-selftest.c | 1099 +++++++++++++++++++++++++++++++++++-
4 files changed, 1464 insertions(+), 133 deletions(-)
--
1.8.3.1
