Sorry, forgot to mention the patchset is based on my previous small improvements:
[PATCH v2 00/23] locking/lockdep: Small improvements (https://lkml.org/lkml/2019/5/6/106). On Mon, 13 May 2019 at 17:13, Yuyang Du <duyuy...@gmail.com> wrote: > > 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 >
