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Date: Mon, 13 May 2019 17:11:46 +0800 From: Yuyang Du <duyuyang@...il.com> To: peterz@...radead.org, will.deacon@....com, mingo@...nel.org Cc: bvanassche@....org, ming.lei@...hat.com, frederic@...nel.org, tglx@...utronix.de, boqun.feng@...il.com, linux-kernel@...r.kernel.org, Yuyang Du <duyuyang@...il.com> Subject: [PATCH 00/17] Support for read-write lock deadlock detection 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
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